# Claude Sonnet 5.5Low

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Anthropic

Canonical URL: https://benchize.com/models/claude-sonnet-5-5-low
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.

Anthropic

## Benchmarks

| Benchmark | Score | ± | Rank | Cost | Source |  |
| --- | --- | --- | --- | --- | --- | --- |
| [FrontierCode 1.1 extended](https://benchize.com/benchmarks/frontiercode%3Av1_1%3Aextended.md) | 43.41% | — | 105 / 125 | $0.17 | [frontiercode](https://cognition.com/data/frontiercode-leaderboard/data.json) |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `score` \| 0.4341 \| score_fraction \| blocking_criteria_adjusted \| Higher is better \| \| `correct` \| 0.4787 \| score_fraction \| raw_rubric \| Higher is better \| \| `cost` \| 0.1688 \| USD \| per_rollout \| Lower is better \| ### Configuration harness claude-code Reasoning effort low sourceVersion v1_1 subset extended ### Reported statistics flaggedRate 0.004 sampleSize 150 ### Source [Original source](https://cognition.com/data/frontiercode-leaderboard/data.json) Source frontiercode Original model label Claude Sonnet 5.5 Observed 2026-10-22T05:40:03.220Z Evidence SHA-256 `ff0040778b7bdf69c705ad7474f771fb5e53cfaf5cf8573b3a4614153543d75f` Source locator `/v1_1/data/Claude%20Sonnet%205.5/low/extended` |  |  |  |  |  |  |
| [BullshitBench v2](https://benchize.com/benchmarks/bullshitbench%3Av2.md) | 60% | — | 45 / 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` \| 0.6 \| score_fraction \| all_attempts \| Higher is better \| \| `red_rate` \| 0.08 \| score_fraction \| all_attempts \| Lower is better \| \| `refusal_rate` \| 0.0 \| score_fraction \| all_attempts \| Lower is better \| \| `avg_score` \| 1.5267 \| score \| judge_grade_0_to_2 \| Higher is better \| ### Configuration Reasoning effort low suite v2 thinkingEnabled true ### Reported statistics acceptedCount 8 answeredCount 100 clearCount 60 errorCount 0 partialCount 32 rank 41 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 anthropic/claude-sonnet-5.5 Source version v2 Observed 2026-10-22T03:10:12.603Z Evidence SHA-256 `98b485e08764d1c97144bc4f7b28ced1a96d50850947c775870dfda0e5d749b5` Source locator `/rows/40` |  |  |  |  |  |  |
| [ARC-AGI-1](https://benchize.com/benchmarks/arc-prize%3Av1_Semi_Private.md) | 67% | — | 137 / 245 | 0.06usd per task | [arc prize · v1](https://arcprize.org/media/data/leaderboard/v1.json) |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `score` \| 0.67 \| score_fraction \| v1_Semi_Private \| Higher is better \| \| `cost_per_task` \| 0.06077602000000002 \| usd_per_task \| v1_Semi_Private \| Lower is better \| ### Configuration evaluationSplit v1_Semi_Private harness Not reported modelGroup anthropic-claude-sonnet-5-5 modelType CoT Reasoning effort low sourceModelVersion anthropic-claude-sonnet-5-5-low thinkingEnabled true ### Source [Original source](https://arcprize.org/media/data/leaderboard/v1.json) Source arc prize Original model label Claude Sonnet 5.5 (Low) Source version v1 Observed 2026-10-22T05:20:04.066Z Evidence SHA-256 `2bf68d22dafba37047d07ad833ebc0e8199c9aa2f9eeaed50c75c1b704462836` Source locator `/evaluations/297` |  |  |  |  |  |  |
| [FrontierCode 1.1 main](https://benchize.com/benchmarks/frontiercode%3Av1_1%3Amain.md) | 29.33% | — | 100 / 125 | $0.19 | [frontiercode](https://cognition.com/data/frontiercode-leaderboard/data.json) |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `score` \| 0.2933 \| score_fraction \| blocking_criteria_adjusted \| Higher is better \| \| `correct` \| 0.328 \| score_fraction \| raw_rubric \| Higher is better \| \| `cost` \| 0.194 \| USD \| per_rollout \| Lower is better \| ### Configuration harness claude-code Reasoning effort low sourceVersion v1_1 subset main ### Reported statistics flaggedRate 0 sampleSize 100 ### Source [Original source](https://cognition.com/data/frontiercode-leaderboard/data.json) Source frontiercode Original model label Claude Sonnet 5.5 Observed 2026-10-22T05:40:03.220Z Evidence SHA-256 `ff0040778b7bdf69c705ad7474f771fb5e53cfaf5cf8573b3a4614153543d75f` Source locator `/v1_1/data/Claude%20Sonnet%205.5/low/main` |  |  |  |  |  |  |
| [ToneBench Scriptwriting](https://benchize.com/benchmarks/tonebench%3Ascripts.md) | 1,789.4 | Range 1,750.8–1,826.2 | 53 / 126 | — | [tonebench](https://benchmark.towardsai.com/data/leaderboard.json) |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `elo` \| 1789.4 \| rating \| reported \| Higher is better \| \| `overall` \| 78.92 \| percent \| reported \| Higher is better \| \| `anti_slop_numbers` \| 73.38 \| source_score \| rubric \| Higher is better \| \| `continuity_emotion` \| 79.33 \| source_score \| rubric \| Higher is better \| \| `cue_quality` \| 73.27 \| source_score \| rubric \| Higher is better \| \| `hook_strength` \| 82.96 \| source_score \| rubric \| Higher is better \| \| `length_adherence` \| 75.72 \| source_score \| rubric \| Higher is better \| \| `slop` \| 83.47 \| source_score \| rubric \| Higher is better \| \| `slop_score` \| 93.55 \| source_score \| rubric \| Higher is better \| \| `substance_accuracy` \| 83.17 \| source_score \| rubric \| Higher is better \| \| `tone_voice` \| 76.61 \| source_score \| rubric \| Higher is better \| \| `writing_quality` \| 77.84 \| source_score \| rubric \| Higher is better \| \| `youtube_best_practices` \| 76.72 \| source_score \| rubric \| Higher is better \| ### Configuration provider claude-code Reasoning effort low scoreScope 10_task_current sourceConfiguration claude-sonnet-5-5-low thinkingEnabled true ### Reported statistics Uncertainty Reported interval: 1,750.8–1,826.2 interval [1750.8,1826.2] rank 53 runCount 5 ### Source [Original source](https://benchmark.towardsai.com/data/leaderboard.json) Source tonebench Original model label Claude Sonnet 5.5 (low) Evaluated 2026-10-08 Observed 2026-10-22T04:40:14.102Z Evidence SHA-256 `4264338337f418d3ded7ace250cad64fe12cacbd4b79a312bfaf0ae9268a01c3` Source locator `/rows/52` |  |  |  |  |  |  |
| [AutomationBench](https://benchize.com/benchmarks/zapier%3Aautomationbench.md) | 18.26% | — | 42 / 113 | $0.28 | [zapier](https://framerusercontent.com/sites/4WTSl4BNjd1q9QFEFibC6h/lOvLnhItj8S8-1vyjH_s33Jn-WmUXPmiJ5Diajl0Q38.CMutaHYl.mjs) |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `score` \| 18.26 \| percent \| reported \| Higher is better \| \| `cost` \| 0.28 \| USD \| per_task \| Lower is better \| ### Configuration benchmarkVersion 1.0.6 costFootnote false Fallback policy Provider default Reasoning effort low Model configuration Claude Sonnet 5.5 (default fallbacks, Low) thinkingEnabled true Fallback is enabled for refusals; this does not mean every task used a fallback model. ### Reported statistics rank 43 ### Source [Original source](https://framerusercontent.com/sites/4WTSl4BNjd1q9QFEFibC6h/lOvLnhItj8S8-1vyjH_s33Jn-WmUXPmiJ5Diajl0Q38.CMutaHYl.mjs) Source zapier Original model label Claude Sonnet 5.5 (default fallbacks, Low) Observed 2026-10-21T16:34:56.783Z Evidence SHA-256 `43978e38f018789fa59c11de5328abe9e5905bfa9a5a4d601fa3aa4d9c153b0d` Source locator `/rows/42` |  |  |  |  |  |  |
| [ARC-AGI-2](https://benchize.com/benchmarks/arc-prize%3Av2_Semi_Private.md) | 24.03% | — | 129 / 243 | 0.11usd per task | [arc prize · v2](https://arcprize.org/media/data/leaderboard/v2.json) |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `score` \| 0.24027777777777776 \| score_fraction \| v2_Semi_Private \| Higher is better \| \| `cost_per_task` \| 0.10923548333333331 \| usd_per_task \| v2_Semi_Private \| Lower is better \| ### Configuration evaluationSplit v2_Semi_Private harness Not reported modelGroup anthropic-claude-sonnet-5-5 modelType CoT Reasoning effort low sourceModelVersion anthropic-claude-sonnet-5-5-low thinkingEnabled true ### Source [Original source](https://arcprize.org/media/data/leaderboard/v2.json) Source arc prize Original model label Claude Sonnet 5.5 (Low) Source version v2 Observed 2026-10-22T05:20:04.306Z Evidence SHA-256 `4351eb696e78113b0459e9bb5f0258318b905efef34f473dcea51ce641b0d94d` Source locator `/evaluations/297` |  |  |  |  |  |  |
| [ARC-AGI-3](https://benchize.com/benchmarks/arc-prize%3Av3_Semi_Private.md) | 0.4% | — | 41 / 65 | 4,756.68usd | [arc prize · v3](https://arcprize.org/media/data/leaderboard/v3.json) |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `score` \| 0.004047513036164488 \| score_fraction \| v3_Semi_Private \| Higher is better \| \| `total_cost` \| 4756.680228 \| usd \| v3_Semi_Private \| Lower is better \| ### Configuration evaluationSplit v3_Semi_Private harness standard modelGroup anthropic-claude-sonnet-5-5 modelType CoT Reasoning effort low sourceModelVersion anthropic-claude-sonnet-5-5-low thinkingEnabled true ### Source [Original source](https://arcprize.org/media/data/leaderboard/v3.json) Source arc prize Original model label Claude Sonnet 5.5 (Low) Source version v3 Observed 2026-10-22T05:20:04.578Z Evidence SHA-256 `3ce335487296bb2dcf4ba9546c5a2a02b1907db5b08887cd9ff4429fed824916` Source locator `/evaluations/105` |  |  |  |  |  |  |

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Cite as: Claude Sonnet 5.5Low — Benchize, https://benchize.com/models/claude-sonnet-5-5-low (retrieved 2026-10-22)