# IOI / overall > Source: Benchize (https://benchize.com) — https://benchize.com/benchmarks/vals-ai%3Aioi%3Aoverall. When citing or reusing this content, credit "Benchize" and link to https://benchize.com/benchmarks/vals-ai%3Aioi%3Aoverall. Based on the International Olympiad in Informatics Canonical URL: https://benchize.com/benchmarks/vals-ai%3Aioi%3Aoverall Last updated: Wed, 21 Oct 2026 18:52:20 GMT Reproduction and quotation must name Benchize, link to the canonical HTML URL, and retain individual source citations. Conquered Based on the International Olympiad in Informatics Coding · Models tested: 29 · Score publishers: Vals AI ## Model results | # | Model | Score | ± | Cost | Latency | | | --- | --- | --- | --- | --- | --- | --- | | 1 | [Gemini 4 Argon](https://benchize.com/models/gemini-4-argon-high.md)High | 100% | SE ±0 pp | $5.31 | 1,459.27source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 100 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 5.307626 \| USD \| per_test \| Lower is better \| \| `latency` \| 1459.27 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 262144 provider Google reasoning Not reported Reasoning effort high Temperature 1 topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±0 pp sourcePopulation 44 stderr 0 tokenTotals {"cache_read_tokens":46123808,"cache_write_tokens":0,"input_tokens":48678879,"output_tokens":620036,"reasoning_tokens":445230} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label google/gemini-4-argon Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/google~1gemini-4-argon` | | | | | | | | 1 | [GPT-6 Astra](https://benchize.com/models/gpt-6-astra-max.md)Max | 100% | SE ±0 pp | $6.5 | 1,899.78source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 100 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 6.495051 \| USD \| per_test \| Lower is better \| \| `latency` \| 1899.783 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 128000 provider OpenAI reasoning Not reported Reasoning effort max Temperature Not reported topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±0 pp sourcePopulation 44 stderr 0 tokenTotals {"cache_read_tokens":1590180,"cache_write_tokens":166635,"input_tokens":1757046,"output_tokens":71209,"reasoning_tokens":40588} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label openai/gpt-6-astra Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/openai~1gpt-6-astra` | | | | | | | | 3 | [GPT-6.1 Sol](https://benchize.com/models/gpt-6-1-sol-max.md)Max | 96.89% | SE ±3.11 pp | $1.26 | 1,890.71source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 96.889 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 1.261598 \| USD \| per_test \| Lower is better \| \| `latency` \| 1890.714 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 128000 provider OpenAI reasoning Not reported Reasoning effort max Temperature Not reported topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±3.11 pp sourcePopulation 44 stderr 3.111 tokenTotals {"cache_read_tokens":1711529,"cache_write_tokens":205001,"input_tokens":1916776,"output_tokens":91537,"reasoning_tokens":61697} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label openai/gpt-6.1-sol Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/openai~1gpt-6.1-sol` | | | | | | | | 4 | [Claude Opus 5.5](https://benchize.com/models/claude-opus-5-5-max.md)Max | 95.06% | SE ±4.94 pp | $5.26 | 1,035.19source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 95.056 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 5.258418 \| USD \| per_test \| Lower is better \| \| `latency` \| 1035.191 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort max harness Not reported maxOutputTokens 128000 provider Anthropic reasoning Not reported Reasoning effort max Temperature 1 topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±4.94 pp sourcePopulation 44 stderr 4.944 tokenTotals {"cache_read_tokens":26284219,"cache_write_tokens":1186555,"input_tokens":27471087,"output_tokens":744246,"reasoning_tokens":630177} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label anthropic/claude-opus-5-5 Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/anthropic~1claude-opus-5-5` | | | | | | | | 5 | [GPT-5.6 Sol](https://benchize.com/models/gpt-5-6-sol-max.md)Max | 91.17% | SE ±4.51 pp | $7.98 | 3,711.63source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 91.167 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 7.982135 \| USD \| per_test \| Lower is better \| \| `latency` \| 3711.631 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 128000 provider OpenAI reasoning Not reported Reasoning effort max Temperature Not reported topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±4.51 pp sourcePopulation 44 stderr 4.51 tokenTotals {"cache_read_tokens":4104315,"cache_write_tokens":384882,"input_tokens":4489581,"output_tokens":156360,"reasoning_tokens":114595} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label openai/gpt-5.6-sol Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/openai~1gpt-5.6-sol` | | | | | | | | 6 | [Claude Fable 5.1](https://benchize.com/models/claude-fable-5-1-max.md)Max | 90.78% | SE ±4.65 pp | $11.2 | 1,805.91source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 90.778 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 11.196959 \| USD \| per_test \| Lower is better \| \| `latency` \| 1805.905 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort max harness Not reported maxOutputTokens 128000 provider Anthropic reasoning Not reported Reasoning effort max Temperature 1 topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±4.65 pp sourcePopulation 44 stderr 4.647 tokenTotals {"cache_read_tokens":35233518,"cache_write_tokens":1449894,"input_tokens":36683836,"output_tokens":982199,"reasoning_tokens":853725} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label anthropic/claude-fable-5-1 Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/anthropic~1claude-fable-5-1` | | | | | | | | 7 | [GPT-5.6 Terra](https://benchize.com/models/gpt-5-6-terra-max.md)Max | 87.61% | SE ±6.53 pp | $8.66 | 4,992.84source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 87.611 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 8.664009 \| USD \| per_test \| Lower is better \| \| `latency` \| 4992.838 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 128000 provider OpenAI reasoning Not reported Reasoning effort max Temperature Not reported topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±6.53 pp sourcePopulation 44 stderr 6.531 tokenTotals {"cache_read_tokens":8044366,"cache_write_tokens":410842,"input_tokens":8455718,"output_tokens":222620,"reasoning_tokens":182032} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label openai/gpt-5.6-terra Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/openai~1gpt-5.6-terra` | | | | | | | | 8 | [Claude Opus 5](https://benchize.com/models/claude-opus-5-max.md)Max | 84.33% | SE ±9.96 pp | $16.48 | 3,402.05source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 84.333 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 16.477241 \| USD \| per_test \| Lower is better \| \| `latency` \| 3402.045 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort max harness Not reported maxOutputTokens 128000 provider Anthropic reasoning Not reported Reasoning effort max Temperature 1 topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±9.96 pp sourcePopulation 44 stderr 9.964 tokenTotals {"cache_read_tokens":93265146,"cache_write_tokens":2811668,"input_tokens":96077494,"output_tokens":1386182,"reasoning_tokens":1125999} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label anthropic/claude-opus-5 Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/anthropic~1claude-opus-5` | | | | | | | | 9 | [Claude Sonnet 5.5](https://benchize.com/models/claude-sonnet-5-5-max.md)Max | 83.06% | SE ±3.74 pp | $7.52 | 2,751.08source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 83.056 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 7.524252 \| USD \| per_test \| Lower is better \| \| `latency` \| 2751.084 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort max harness Not reported maxOutputTokens 128000 provider Anthropic reasoning Not reported Reasoning effort max Temperature 1 topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±3.74 pp sourcePopulation 44 stderr 3.737 tokenTotals {"cache_read_tokens":103054095,"cache_write_tokens":3751464,"input_tokens":106806202,"output_tokens":1512099,"reasoning_tokens":1288748} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label anthropic/claude-sonnet-5-5 Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/anthropic~1claude-sonnet-5-5` | | | | | | | | 10 | [GPT-6 Sol](https://benchize.com/models/gpt-6-sol-max.md)Max | 82.61% | SE ±9.24 pp | $2.7 | 1,837.55source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 82.611 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 2.703348 \| USD \| per_test \| Lower is better \| \| `latency` \| 1837.553 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 128000 provider OpenAI reasoning Not reported Reasoning effort max Temperature Not reported topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±9.24 pp sourcePopulation 44 stderr 9.24 tokenTotals {"cache_read_tokens":3736261,"cache_write_tokens":324992,"input_tokens":4061594,"output_tokens":147384,"reasoning_tokens":114768} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label openai/gpt-6-sol Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/openai~1gpt-6-sol` | | | | | | | | 11 | [Gemini 3.7 Flash](https://benchize.com/models/gemini-3-7-flash-high.md)High | 67.83% | SE ±3.61 pp | $3.4 | 1,269.02source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 67.833 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 3.398069 \| USD \| per_test \| Lower is better \| \| `latency` \| 1269.021 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 65536 provider Google reasoning Not reported Reasoning effort high Temperature 1 topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±3.61 pp sourcePopulation 44 stderr 3.606 tokenTotals {"cache_read_tokens":39685727,"cache_write_tokens":0,"input_tokens":45709147,"output_tokens":720057,"reasoning_tokens":366849} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label google/gemini-3.7-flash Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/google~1gemini-3.7-flash` | | | | | | | | 12 | [Muse Wonder](https://benchize.com/models/muse-wonder-max.md)Max | 66.94% | SE ±4.91 pp | $4.54 | 1,502.07source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 66.944 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 4.541594 \| USD \| per_test \| Lower is better \| \| `latency` \| 1502.067 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 131072 provider Meta reasoning Not reported Reasoning effort max Temperature 1 topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±4.91 pp sourcePopulation 44 stderr 4.908 tokenTotals {"cache_read_tokens":45120168,"cache_write_tokens":0,"input_tokens":46010185,"output_tokens":725011,"reasoning_tokens":590661} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label meta/muse-wonder Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/meta~1muse-wonder` | | | | | | | | 13 | [GPT-5.6 Luna](https://benchize.com/models/gpt-5-6-luna-max.md)Max | 61.78% | SE ±11.61 pp | $0.58 | 4,175.41source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 61.778 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 0.57961 \| USD \| per_test \| Lower is better \| \| `latency` \| 4175.412 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 128000 provider OpenAI reasoning Not reported Reasoning effort max Temperature Not reported topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±11.61 pp sourcePopulation 44 stderr 11.613 tokenTotals {"cache_read_tokens":32366771,"cache_write_tokens":960008,"input_tokens":33327725,"output_tokens":460900,"reasoning_tokens":354484} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label openai/gpt-5.6-luna Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/openai~1gpt-5.6-luna` | | | | | | | | 14 | [Gemini 3.8 Flash](https://benchize.com/models/gemini-3-8-flash-high.md)High | 56.94% | SE ±2.26 pp | $3.98 | 860.47source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 56.944 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 3.976052 \| USD \| per_test \| Lower is better \| \| `latency` \| 860.465 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 65536 provider Google reasoning Not reported Reasoning effort high Temperature 1 topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±2.26 pp sourcePopulation 44 stderr 2.257 tokenTotals {"cache_read_tokens":77087994,"cache_write_tokens":0,"input_tokens":80760215,"output_tokens":904638,"reasoning_tokens":577481} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label google/gemini-3.8-flash Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/google~1gemini-3.8-flash` | | | | | | | | 15 | [GPT-6 Luna](https://benchize.com/models/gpt-6-luna-max.md)Max | 55.56% | SE ±8.87 pp | $0.2 | 2,147.14source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 55.556 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 0.199412 \| USD \| per_test \| Lower is better \| \| `latency` \| 2147.141 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 128000 provider OpenAI reasoning Not reported Reasoning effort max Temperature Not reported topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±8.87 pp sourcePopulation 44 stderr 8.866 tokenTotals {"cache_read_tokens":22466950,"cache_write_tokens":1008870,"input_tokens":23476341,"output_tokens":697861,"reasoning_tokens":642789} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label openai/gpt-6-luna Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/openai~1gpt-6-luna` | | | | | | | | 16 | [GPT-5.3 Codex](https://benchize.com/models/gpt-5-3-codex-xhigh.md)Extra high | 53.83% | SE ±6.31 pp | $2.68 | 1,791.69source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 53.833 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 2.68083 \| USD \| per_test \| Lower is better \| \| `latency` \| 1791.685 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 128000 provider OpenAI reasoning Not reported Reasoning effort xhigh Temperature Not reported topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±6.31 pp sourcePopulation 44 stderr 6.312 tokenTotals {"cache_read_tokens":21352960,"cache_write_tokens":0,"input_tokens":22315885,"output_tokens":552013,"reasoning_tokens":420622} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label openai/gpt-5.3-codex Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/openai~1gpt-5.3-codex` | | | | | | | | 17 | [Gemini 3.1 Pro Preview](https://benchize.com/models/gemini-3-1-pro-preview-high.md)High | 51.83% | SE ±2.59 pp | $1.25 | 722.64source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 51.833 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 1.25149 \| USD \| per_test \| Lower is better \| \| `latency` \| 722.637 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 65536 provider Google reasoning Not reported Reasoning effort high Temperature 1 topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±2.59 pp sourcePopulation 44 stderr 2.589 tokenTotals {"cache_read_tokens":6122209,"cache_write_tokens":0,"input_tokens":7336646,"output_tokens":321302,"reasoning_tokens":262939} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label google/gemini-3.1-pro-preview Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/google~1gemini-3.1-pro-preview` | | | | | | | | 18 | [DeepSeek V4 Pro 0813](https://benchize.com/models/deepseek-v4-pro-0813-max.md)Max | 51.61% | SE ±2.4 pp | $2.15 | 4,045.97source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 51.611 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 2.151589 \| USD \| per_test \| Lower is better \| \| `latency` \| 4045.972 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 384000 provider DeepSeek reasoning Not reported Reasoning effort max Temperature Not reported topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±2.4 pp sourcePopulation 44 stderr 2.4 tokenTotals {"cache_read_tokens":126531285,"cache_write_tokens":0,"input_tokens":126847094,"output_tokens":1737645,"reasoning_tokens":1498891} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label deepseek/deepseek-v4-pro-0813 Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/deepseek~1deepseek-v4-pro-0813` | | | | | | | | 19 | [MiMo-V2.6-Flash](https://benchize.com/models/mimo-v2-6-flash.md) | 47.67% | SE ±4.79 pp | $0.22 | 6,521.61source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 47.667 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 0.215104 \| USD \| per_test \| Lower is better \| \| `latency` \| 6521.606 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 128000 provider Xiaomi reasoning Not reported Reasoning effort unknown Temperature 1 topP 0.95 verbosity Not reported ### Reported statistics Uncertainty Standard error: ±4.79 pp sourcePopulation 44 stderr 4.785 tokenTotals {"cache_read_tokens":121214869,"cache_write_tokens":0,"input_tokens":123657830,"output_tokens":1422082,"reasoning_tokens":1254795} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label xiaomi/mimo-v2.6-flash Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/xiaomi~1mimo-v2.6-flash` | | | | | | | | 20 | [Claude Haiku 5.5](https://benchize.com/models/claude-haiku-5-5-max.md)Max | 47.28% | SE ±10.72 pp | $0.83 | 753.82source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 47.278 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 0.826826 \| USD \| per_test \| Lower is better \| \| `latency` \| 753.816 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort max harness Not reported maxOutputTokens 128000 provider Anthropic reasoning Not reported Reasoning effort max Temperature Not reported topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±10.72 pp sourcePopulation 44 stderr 10.721 tokenTotals {"cache_read_tokens":31449829,"cache_write_tokens":1921938,"input_tokens":33372069,"output_tokens":1490525,"reasoning_tokens":1377357} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label anthropic/claude-haiku-5-5 Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/anthropic~1claude-haiku-5-5` | | | | | | | | 21 | [Claude Sonnet 5](https://benchize.com/models/claude-sonnet-5-max.md)Max | 45% | SE ±2.75 pp | $12.89 | 3,583.88source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 45 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 12.889951 \| USD \| per_test \| Lower is better \| \| `latency` \| 3583.884 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort max harness Not reported maxOutputTokens 128000 provider Anthropic reasoning Not reported Reasoning effort max Temperature 1 topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±2.75 pp sourcePopulation 44 stderr 2.754 tokenTotals {"cache_read_tokens":222811755,"cache_write_tokens":4771571,"input_tokens":227584620,"output_tokens":2084584,"reasoning_tokens":1802695} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label anthropic/claude-sonnet-5 Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/anthropic~1claude-sonnet-5` | | | | | | | | 22 | [Muse Spark 1.3](https://benchize.com/models/muse-spark-1-3-xhigh.md)Extra high | 43.94% | SE ±1.45 pp | $2.36 | 1,791.13source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 43.944 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 2.360741 \| USD \| per_test \| Lower is better \| \| `latency` \| 1791.133 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 131072 provider Meta reasoning Not reported Reasoning effort xhigh Temperature 1 topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±1.45 pp sourcePopulation 44 stderr 1.448 tokenTotals {"cache_read_tokens":27101376,"cache_write_tokens":0,"input_tokens":28367260,"output_tokens":1984488,"reasoning_tokens":1867961} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label meta/muse_spark_1_3 Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/meta~1muse_spark_1_3` | | | | | | | | 23 | [DeepSeek V4.1 Flash](https://benchize.com/models/deepseek-v4-1-flash-high.md)High | 40.28% | SE ±2.56 pp | $0.24 | 1,109.58source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 40.278 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 0.24255 \| USD \| per_test \| Lower is better \| \| `latency` \| 1109.577 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 384000 provider DeepSeek reasoning Not reported Reasoning effort high Temperature Not reported topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±2.56 pp sourcePopulation 44 stderr 2.557 tokenTotals {"cache_read_tokens":39069653,"cache_write_tokens":0,"input_tokens":39221134,"output_tokens":970177,"reasoning_tokens":853932} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label deepseek/deepseek-v4.1-flash Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/deepseek~1deepseek-v4.1-flash` | | | | | | | | 24 | [MiMo-V2.6-Pro](https://benchize.com/models/mimo-v2-6-pro.md) | 39.33% | SE ±2.41 pp | $0.84 | 8,782.52source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 39.333 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 0.835497 \| USD \| per_test \| Lower is better \| \| `latency` \| 8782.516 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 128000 provider Xiaomi reasoning Not reported Reasoning effort unknown Temperature 1 topP 0.95 verbosity Not reported ### Reported statistics Uncertainty Standard error: ±2.41 pp sourcePopulation 44 stderr 2.406 tokenTotals {"cache_read_tokens":36201515,"cache_write_tokens":0,"input_tokens":39729593,"output_tokens":2885122,"reasoning_tokens":2836052} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label xiaomi/mimo-v2.6-pro Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/xiaomi~1mimo-v2.6-pro` | | | | | | | | 25 | [Step 5 Preview](https://benchize.com/models/step-5-preview.md) | 38.06% | SE ±6.69 pp | $2.03 | 4,820.9source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 38.056 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 2.025817 \| USD \| per_test \| Lower is better \| \| `latency` \| 4820.902 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 1024000 provider Stepfun reasoning Not reported Reasoning effort unknown Temperature 1 topP 0.95 verbosity Not reported ### Reported statistics Uncertainty Standard error: ±6.69 pp sourcePopulation 44 stderr 6.69 tokenTotals {"cache_read_tokens":84779520,"cache_write_tokens":0,"input_tokens":87277108,"output_tokens":1674540,"reasoning_tokens":0} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label stepfun/step-5-preview Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/stepfun~1step-5-preview` | | | | | | | | 26 | [Gemini 3.6 Flash](https://benchize.com/models/gemini-3-6-flash-high.md)High | 35.06% | SE ±5.7 pp | $8.67 | 2,903.31source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 35.056 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 8.66611 \| USD \| per_test \| Lower is better \| \| `latency` \| 2903.307 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 65536 provider Google reasoning Not reported Reasoning effort high Temperature 1 topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±5.7 pp sourcePopulation 44 stderr 5.695 tokenTotals {"cache_read_tokens":232068785,"cache_write_tokens":0,"input_tokens":238444814,"output_tokens":1016307,"reasoning_tokens":489296} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label google/gemini-3.6-flash Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/google~1gemini-3.6-flash` | | | | | | | | 27 | [DeepSeek V4 Flash 0731](https://benchize.com/models/deepseek-v4-flash-0731-high.md)High | 32.72% | SE ±2.35 pp | $0.37 | 1,663.09source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 32.722 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 0.373112 \| USD \| per_test \| Lower is better \| \| `latency` \| 1663.091 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 256000 provider DeepSeek reasoning Not reported Reasoning effort high Temperature Not reported topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±2.35 pp sourcePopulation 44 stderr 2.35 tokenTotals {"cache_read_tokens":53385216,"cache_write_tokens":0,"input_tokens":53634013,"output_tokens":1034888,"reasoning_tokens":889275} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label deepseek/deepseek-v4-flash-0731 Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/deepseek~1deepseek-v4-flash-0731` | | | | | | | | 28 | [Muse Spark 1.2](https://benchize.com/models/muse-spark-1-2-xhigh.md)Extra high | 21.78% | SE ±0.87 pp | $2.64 | 1,534.63source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 21.778 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 2.640493 \| USD \| per_test \| Lower is better \| \| `latency` \| 1534.626 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 131072 provider Meta reasoning Not reported Reasoning effort xhigh Temperature 1 topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±0.87 pp sourcePopulation 44 stderr 0.873 tokenTotals {"cache_read_tokens":60536406,"cache_write_tokens":0,"input_tokens":62253052,"output_tokens":1065782,"reasoning_tokens":811221} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label meta/muse_spark_1_2 Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/meta~1muse_spark_1_2` | | | | | | | | 29 | [Mercury 2.5](https://benchize.com/models/mercury-2-5-high.md)High | 2.44% | SE ±0.68 pp | $0.16 | 242.94source duration | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 2.444 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 0.160874 \| USD \| per_test \| Lower is better \| \| `latency` \| 242.94 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness Not reported maxOutputTokens 65536 provider Inception reasoning Not reported Reasoning effort high Temperature Not reported topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±0.68 pp sourcePopulation 44 stderr 0.683 tokenTotals {"cache_read_tokens":8024752,"cache_write_tokens":0,"input_tokens":11229915,"output_tokens":201476,"reasoning_tokens":194094} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.CuUolFNv.json) Source Vals AI Original model label inception/mercury-2.5 Source version 2 Observed 2026-10-21T16:46:11.757Z Evidence SHA-256 `e1545b21b5b5c98d037aefa9d441b65859d07a10550f242d0e16162a49b8e8ab` Source locator `/tasks/overall/inception~1mercury-2.5` | | | | | | | --- Cite as: IOI / overall — Benchize, https://benchize.com/benchmarks/vals-ai%3Aioi%3Aoverall (retrieved 2026-10-21)