# GPT-5.3 CodexExtra high > Source: Benchize (https://benchize.com) — https://benchize.com/models/gpt-5-3-codex-xhigh. When citing or reusing this content, credit "Benchize" and link to https://benchize.com/models/gpt-5-3-codex-xhigh. OpenAI Canonical URL: https://benchize.com/models/gpt-5-3-codex-xhigh Last updated: Thu, 22 Oct 2026 06:30:09 GMT Reproduction and quotation must name Benchize, link to the canonical HTML URL, and retain individual source citations. OpenAI ## Benchmarks | Benchmark | Score | ± | Rank | Cost | Latency | Source | | | --- | --- | --- | --- | --- | --- | --- | --- | | [IOI / ioi2024](https://benchize.com/benchmarks/vals-ai%3Aioi%3Aioi2024.md) | 62.83% | SE ±17.09 pp | 16 / 29 | $3.11 | 2,616.98source duration | [Vals AI · 2](https://www.vals.ai/_astro/benchmark_view_ioi.DV1xD5vC.json) | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 62.833 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 3.109282 \| USD \| per_test \| Lower is better \| \| `latency` \| 2616.979 \| 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: ±17.09 pp sourcePopulation 45 stderr 17.092 tokenTotals {"cache_read_tokens":16113664,"cache_write_tokens":0,"input_tokens":16836055,"output_tokens":411919,"reasoning_tokens":325681} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.DV1xD5vC.json) Source Vals AI Original model label openai/gpt-5.3-codex Source version 2 Observed 2026-10-22T02:10:26.312Z Evidence SHA-256 `63a24003cd68e5620c2ddb114b077adec8c5e5bf5916bb04ced543c48d731a45` Source locator `/tasks/ioi2024/openai~1gpt-5.3-codex` | | | | | | | | | [SWE-bench / 15 min - 1 hour](https://benchize.com/benchmarks/vals-ai%3Aswebench%3A15%20min%20-%201%20hour.md) | 73.18% | SE ±2.75 pp | 22 / 39 | $0.48 | 264.03source duration | [Vals AI · 1](https://www.vals.ai/_astro/benchmark_view_swebench.Ae8ni7h0.json) | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 73.18 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 0.479692 \| USD \| per_test \| Lower is better \| \| `latency` \| 264.025 \| 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: ±2.75 pp sourcePopulation 88 stderr 2.748 tokenTotals Not reported ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_swebench.Ae8ni7h0.json) Source Vals AI Original model label openai/gpt-5.3-codex Source version 1 Observed 2026-10-22T02:10:28.317Z Evidence SHA-256 `7a4e2e8485283caac500127419f68ec4bd5414c837ade114fc6afa5b2d34ccaa` Source locator `/tasks/15 min - 1 hour/openai~1gpt-5.3-codex` | | | | | | | | | [LiveCodeBench / overall](https://benchize.com/benchmarks/vals-ai%3Alcb%3Aoverall.md) | 87.31% | SE ±0.97 pp | 13 / 43 | $0.09 | 132.63source duration | [Vals AI · 1](https://www.vals.ai/_astro/benchmark_view_lcb.miyRUvVa.json) | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 87.313 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 0.091585 \| USD \| per_test \| Lower is better \| \| `latency` \| 132.631 \| 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: ±0.97 pp sourcePopulation 143 stderr 0.968 tokenTotals Not reported ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_lcb.miyRUvVa.json) Source Vals AI Original model label openai/gpt-5.3-codex Source version 1 Observed 2026-10-22T02:10:28.824Z Evidence SHA-256 `1a7c7dabc9d95a0182886b1edc42623987cac2095a0d407a5e334f37acdfa2f5` Source locator `/tasks/overall/openai~1gpt-5.3-codex` | | | | | | | | | [SWE-bench / 1-4 hours](https://benchize.com/benchmarks/vals-ai%3Aswebench%3A1-4%20hours.md) | 54.76% | SE ±7.77 pp | 13 / 39 | $0.82 | 405.87source duration | [Vals AI · 1](https://www.vals.ai/_astro/benchmark_view_swebench.Ae8ni7h0.json) | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 54.762 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 0.818585 \| USD \| per_test \| Lower is better \| \| `latency` \| 405.865 \| 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: ±7.77 pp sourcePopulation 88 stderr 7.773 tokenTotals Not reported ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_swebench.Ae8ni7h0.json) Source Vals AI Original model label openai/gpt-5.3-codex Source version 1 Observed 2026-10-22T02:10:28.317Z Evidence SHA-256 `7a4e2e8485283caac500127419f68ec4bd5414c837ade114fc6afa5b2d34ccaa` Source locator `/tasks/1-4 hours/openai~1gpt-5.3-codex` | | | | | | | | | [BullshitBench v2](https://benchize.com/benchmarks/bullshitbench%3Av2.md) | 19% | — | 141 / 191 | — | — | [bullshitbench · v2](https://api.github.com/repos/petergpt/bullshit-benchmark/contents/data/v2/latest/leaderboard.csv?ref=3c655234d15967738f95da696e3f938d4862dcf7) | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `green_rate` \| 0.19 \| score_fraction \| all_attempts \| Higher is better \| \| `red_rate` \| 0.5 \| score_fraction \| all_attempts \| Lower is better \| \| `refusal_rate` \| 0.0 \| score_fraction \| all_attempts \| Lower is better \| \| `avg_score` \| 0.6767 \| score \| judge_grade_0_to_2 \| Higher is better \| ### Configuration Reasoning effort xhigh suite v2 thinkingEnabled true ### Reported statistics acceptedCount 50 answeredCount 100 clearCount 19 errorCount 0 partialCount 31 rank 156 refusalCount 0 sampleSize 100 ### Source [Original source](https://api.github.com/repos/petergpt/bullshit-benchmark/contents/data/v2/latest/leaderboard.csv?ref=3c655234d15967738f95da696e3f938d4862dcf7) Source bullshitbench Original model label openai/gpt-5.3-codex Source version v2 Observed 2026-10-22T03:10:12.603Z Evidence SHA-256 `98b485e08764d1c97144bc4f7b28ced1a96d50850947c775870dfda0e5d749b5` Source locator `/rows/155` | | | | | | | | | [SWE-bench / overall](https://benchize.com/benchmarks/vals-ai%3Aswebench%3Aoverall.md) | 78% | SE ±1.85 pp | 19 / 39 | $0.46 | 246.53source duration | [Vals AI · 1](https://www.vals.ai/_astro/benchmark_view_swebench.Ae8ni7h0.json) | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 78 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 0.455384 \| USD \| per_test \| Lower is better \| \| `latency` \| 246.527 \| 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: ±1.85 pp sourcePopulation 88 stderr 1.854 tokenTotals Not reported ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_swebench.Ae8ni7h0.json) Source Vals AI Original model label openai/gpt-5.3-codex Source version 1 Observed 2026-10-22T02:10:28.317Z Evidence SHA-256 `7a4e2e8485283caac500127419f68ec4bd5414c837ade114fc6afa5b2d34ccaa` Source locator `/tasks/overall/openai~1gpt-5.3-codex` | | | | | | | | | [LiveCodeBench / easy](https://benchize.com/benchmarks/vals-ai%3Alcb%3Aeasy.md) | 99.07% | SE ±0.54 pp | 1 / 43 | $0.01 | 17.47source duration | [Vals AI · 1](https://www.vals.ai/_astro/benchmark_view_lcb.miyRUvVa.json) | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 99.068 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 0.013703 \| USD \| per_test \| Lower is better \| \| `latency` \| 17.469 \| 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: ±0.54 pp sourcePopulation 143 stderr 0.535 tokenTotals Not reported ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_lcb.miyRUvVa.json) Source Vals AI Original model label openai/gpt-5.3-codex Source version 1 Observed 2026-10-22T02:10:28.824Z Evidence SHA-256 `1a7c7dabc9d95a0182886b1edc42623987cac2095a0d407a5e334f37acdfa2f5` Source locator `/tasks/easy/openai~1gpt-5.3-codex` | | | | | | | | | [SWE-bench / >4 hours](https://benchize.com/benchmarks/vals-ai%3Aswebench%3A%3E4%20hours.md) | 33.33% | SE ±33.33 pp | 13 / 39 | $0.7 | 412.1source duration | [Vals AI · 1](https://www.vals.ai/_astro/benchmark_view_swebench.Ae8ni7h0.json) | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 33.333 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 0.69549 \| USD \| per_test \| Lower is better \| \| `latency` \| 412.097 \| 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: ±33.33 pp sourcePopulation 88 stderr 33.333 tokenTotals Not reported ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_swebench.Ae8ni7h0.json) Source Vals AI Original model label openai/gpt-5.3-codex Source version 1 Observed 2026-10-22T02:10:28.317Z Evidence SHA-256 `7a4e2e8485283caac500127419f68ec4bd5414c837ade114fc6afa5b2d34ccaa` Source locator `/tasks/>4 hours/openai~1gpt-5.3-codex` | | | | | | | | | [LiveCodeBench / medium](https://benchize.com/benchmarks/vals-ai%3Alcb%3Amedium.md) | 87.73% | SE ±1.68 pp | 20 / 43 | $0.05 | 74.05source duration | [Vals AI · 1](https://www.vals.ai/_astro/benchmark_view_lcb.miyRUvVa.json) | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 87.728 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 0.051518 \| USD \| per_test \| Lower is better \| \| `latency` \| 74.045 \| 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: ±1.68 pp sourcePopulation 143 stderr 1.677 tokenTotals Not reported ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_lcb.miyRUvVa.json) Source Vals AI Original model label openai/gpt-5.3-codex Source version 1 Observed 2026-10-22T02:10:28.824Z Evidence SHA-256 `1a7c7dabc9d95a0182886b1edc42623987cac2095a0d407a5e334f37acdfa2f5` Source locator `/tasks/medium/openai~1gpt-5.3-codex` | | | | | | | | | [Vibe Code Bench v1.1 / overall](https://benchize.com/benchmarks/vals-ai%3Avibe-code%3Aoverall.md) | 61.77% | SE ±4.71 pp | 35 / 59 | $11.91 | 4,548.12source duration | [Vals AI · 1.1](https://www.vals.ai/_astro/benchmark_view_vibe_code_bench.DcEBMbCA.json) | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 61.767 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 11.914536 \| USD \| per_test \| Lower is better \| \| `latency` \| 4548.115 \| source_duration \| reported_duration \| Lower is better \| ### Configuration computeEffort Not reported harness OpenHands maxOutputTokens 128000 provider OpenAI reasoning Not reported Reasoning effort xhigh Temperature Not reported topP Not reported verbosity Not reported ### Reported statistics Uncertainty Standard error: ±4.71 pp sourcePopulation 116 stderr 4.714 tokenTotals {"cache_read_tokens":null,"cache_write_tokens":null,"input_tokens":192538209,"output_tokens":4009383,"reasoning_tokens":null} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_vibe_code_bench.DcEBMbCA.json) Source Vals AI Original model label openai/gpt-5.3-codex Source version 1.1 Observed 2026-10-22T02:10:23.531Z Evidence SHA-256 `0e8c23f521a0f751c5592952620e197b376cade41c78578461b7aa5740a173e7` Source locator `/tasks/overall/openai~1gpt-5.3-codex` | | | | | | | | | [IOI / overall](https://benchize.com/benchmarks/vals-ai%3Aioi%3Aoverall.md) | 53.83% | SE ±6.31 pp | 16 / 29 | $2.68 | 1,791.69source duration | [Vals AI · 2](https://www.vals.ai/_astro/benchmark_view_ioi.DV1xD5vC.json) | | | ### 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 45 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.DV1xD5vC.json) Source Vals AI Original model label openai/gpt-5.3-codex Source version 2 Observed 2026-10-22T02:10:26.312Z Evidence SHA-256 `63a24003cd68e5620c2ddb114b077adec8c5e5bf5916bb04ced543c48d731a45` Source locator `/tasks/overall/openai~1gpt-5.3-codex` | | | | | | | | | [IOI / ioi2026](https://benchize.com/benchmarks/vals-ai%3Aioi%3Aioi2026.md) | 41.67% | SE ±12.36 pp | 22 / 29 | $2.76 | 1,436.98source duration | [Vals AI · 2](https://www.vals.ai/_astro/benchmark_view_ioi.DV1xD5vC.json) | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 41.667 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 2.758885 \| USD \| per_test \| Lower is better \| \| `latency` \| 1436.984 \| 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: ±12.36 pp sourcePopulation 45 stderr 12.355 tokenTotals {"cache_read_tokens":30763008,"cache_write_tokens":0,"input_tokens":31929158,"output_tokens":652073,"reasoning_tokens":484527} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.DV1xD5vC.json) Source Vals AI Original model label openai/gpt-5.3-codex Source version 2 Observed 2026-10-22T02:10:26.312Z Evidence SHA-256 `63a24003cd68e5620c2ddb114b077adec8c5e5bf5916bb04ced543c48d731a45` Source locator `/tasks/ioi2026/openai~1gpt-5.3-codex` | | | | | | | | | [SWE-bench / <15 min fix](https://benchize.com/benchmarks/vals-ai%3Aswebench%3A%3C15%20min%20fix.md) | 90.21% | SE ±2.14 pp | 11 / 39 | $0.34 | 185.93source duration | [Vals AI · 1](https://www.vals.ai/_astro/benchmark_view_swebench.Ae8ni7h0.json) | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 90.206 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 0.340336 \| USD \| per_test \| Lower is better \| \| `latency` \| 185.93 \| 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: ±2.14 pp sourcePopulation 88 stderr 2.14 tokenTotals Not reported ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_swebench.Ae8ni7h0.json) Source Vals AI Original model label openai/gpt-5.3-codex Source version 1 Observed 2026-10-22T02:10:28.317Z Evidence SHA-256 `7a4e2e8485283caac500127419f68ec4bd5414c837ade114fc6afa5b2d34ccaa` Source locator `/tasks/<15 min fix/openai~1gpt-5.3-codex` | | | | | | | | | [LiveCodeBench / hard](https://benchize.com/benchmarks/vals-ai%3Alcb%3Ahard.md) | 75.14% | SE ±2.31 pp | 7 / 43 | $0.21 | 306.38source duration | [Vals AI · 1](https://www.vals.ai/_astro/benchmark_view_lcb.miyRUvVa.json) | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 75.143 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 0.209533 \| USD \| per_test \| Lower is better \| \| `latency` \| 306.379 \| 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: ±2.31 pp sourcePopulation 143 stderr 2.31 tokenTotals Not reported ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_lcb.miyRUvVa.json) Source Vals AI Original model label openai/gpt-5.3-codex Source version 1 Observed 2026-10-22T02:10:28.824Z Evidence SHA-256 `1a7c7dabc9d95a0182886b1edc42623987cac2095a0d407a5e334f37acdfa2f5` Source locator `/tasks/hard/openai~1gpt-5.3-codex` | | | | | | | | | [IOI / ioi2025](https://benchize.com/benchmarks/vals-ai%3Aioi%3Aioi2025.md) | 57% | SE ±15.45 pp | 14 / 29 | $2.17 | 1,321.09source duration | [Vals AI · 2](https://www.vals.ai/_astro/benchmark_view_ioi.DV1xD5vC.json) | | | ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `accuracy` \| 57 \| percent \| reported \| Higher is better \| \| `cost_per_test` \| 2.174323 \| USD \| per_test \| Lower is better \| \| `latency` \| 1321.093 \| 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: ±15.45 pp sourcePopulation 45 stderr 15.452 tokenTotals {"cache_read_tokens":17182208,"cache_write_tokens":0,"input_tokens":18182442,"output_tokens":592046,"reasoning_tokens":451657} ### Source [Original source](https://www.vals.ai/_astro/benchmark_view_ioi.DV1xD5vC.json) Source Vals AI Original model label openai/gpt-5.3-codex Source version 2 Observed 2026-10-22T02:10:26.312Z Evidence SHA-256 `63a24003cd68e5620c2ddb114b077adec8c5e5bf5916bb04ced543c48d731a45` Source locator `/tasks/ioi2025/openai~1gpt-5.3-codex` | | | | | | | | --- Cite as: GPT-5.3 CodexExtra high — Benchize, https://benchize.com/models/gpt-5-3-codex-xhigh (retrieved 2026-10-22)