# Claude Sonnet 5.5Medium

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Anthropic

Canonical URL: https://benchize.com/models/claude-sonnet-5-5-medium
Last updated: Thu, 22 Oct 2026 04:30:12 GMT

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Anthropic

## Benchmarks

| Benchmark | Score | ± | Rank | Cost | Source |  |
| --- | --- | --- | --- | --- | --- | --- |
| [FrontierCode 1.1 extended](https://benchize.com/benchmarks/frontiercode%3Av1_1%3Aextended.md) | 50.46% | — | 89 / 125 | $0.21 | [frontiercode](https://cognition.com/data/frontiercode-leaderboard/data.json) |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `score` \| 0.5046 \| score_fraction \| blocking_criteria_adjusted \| Higher is better \| \| `correct` \| 0.5547 \| score_fraction \| raw_rubric \| Higher is better \| \| `cost` \| 0.2051 \| USD \| per_rollout \| Lower is better \| ### Configuration harness claude-code Reasoning effort medium sourceVersion v1_1 subset extended ### Reported statistics flaggedRate 0.0053 sampleSize 150 ### Source [Original source](https://cognition.com/data/frontiercode-leaderboard/data.json) Source frontiercode Original model label Claude Sonnet 5.5 Observed 2026-10-21T16:31:00.878Z Evidence SHA-256 `ff0040778b7bdf69c705ad7474f771fb5e53cfaf5cf8573b3a4614153543d75f` Source locator `/v1_1/data/Claude%20Sonnet%205.5/medium/extended` |  |  |  |  |  |  |
| [FrontierCode 1.1 main](https://benchize.com/benchmarks/frontiercode%3Av1_1%3Amain.md) | 36.48% | — | 85 / 125 | $0.24 | [frontiercode](https://cognition.com/data/frontiercode-leaderboard/data.json) |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `score` \| 0.3648 \| score_fraction \| blocking_criteria_adjusted \| Higher is better \| \| `correct` \| 0.406 \| score_fraction \| raw_rubric \| Higher is better \| \| `cost` \| 0.2365 \| USD \| per_rollout \| Lower is better \| ### Configuration harness claude-code Reasoning effort medium 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 2026-10-21T16:31:00.878Z Evidence SHA-256 `ff0040778b7bdf69c705ad7474f771fb5e53cfaf5cf8573b3a4614153543d75f` Source locator `/v1_1/data/Claude%20Sonnet%205.5/medium/main` |  |  |  |  |  |  |
| [ToneBench Scriptwriting](https://benchize.com/benchmarks/tonebench%3Ascripts.md) | 1,843.3 | Range 1,802.6–1,884.5 | 49 / 126 | — | [tonebench](https://benchmark.towardsai.com/data/leaderboard.json) |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `elo` \| 1843.3 \| rating \| reported \| Higher is better \| \| `overall` \| 79.38 \| percent \| reported \| Higher is better \| \| `anti_slop_numbers` \| 73.31 \| source_score \| rubric \| Higher is better \| \| `continuity_emotion` \| 79.77 \| source_score \| rubric \| Higher is better \| \| `cue_quality` \| 73.16 \| source_score \| rubric \| Higher is better \| \| `hook_strength` \| 82.38 \| source_score \| rubric \| Higher is better \| \| `length_adherence` \| 79.13 \| source_score \| rubric \| Higher is better \| \| `slop` \| 83.53 \| source_score \| rubric \| Higher is better \| \| `slop_score` \| 93.74 \| source_score \| rubric \| Higher is better \| \| `substance_accuracy` \| 82.99 \| source_score \| rubric \| Higher is better \| \| `tone_voice` \| 77.15 \| source_score \| rubric \| Higher is better \| \| `writing_quality` \| 78.1 \| source_score \| rubric \| Higher is better \| \| `youtube_best_practices` \| 77.36 \| source_score \| rubric \| Higher is better \| ### Configuration provider claude-code Reasoning effort medium scoreScope 10_task_current sourceConfiguration claude-sonnet-5-5-medium thinkingEnabled true ### Reported statistics Uncertainty Reported interval: 1,802.6–1,884.5 interval [1802.6,1884.5] rank 49 runCount 5 ### Source [Original source](https://benchmark.towardsai.com/data/leaderboard.json) Source tonebench Original model label Claude Sonnet 5.5 (medium) Evaluated 2026-10-08 Observed 2026-10-21T16:32:48.862Z Evidence SHA-256 `4264338337f418d3ded7ace250cad64fe12cacbd4b79a312bfaf0ae9268a01c3` Source locator `/rows/48` |  |  |  |  |  |  |
| [AutomationBench](https://benchize.com/benchmarks/zapier%3Aautomationbench.md) | 23.29% | — | 32 / 113 | $0.31 | [zapier](https://framerusercontent.com/sites/4WTSl4BNjd1q9QFEFibC6h/lOvLnhItj8S8-1vyjH_s33Jn-WmUXPmiJ5Diajl0Q38.CMutaHYl.mjs) |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `score` \| 23.29 \| percent \| reported \| Higher is better \| \| `cost` \| 0.31 \| USD \| per_task \| Lower is better \| ### Configuration benchmarkVersion 1.0.6 costFootnote false Fallback policy Provider default Reasoning effort medium Model configuration Claude Sonnet 5.5 (default fallbacks, Medium) thinkingEnabled true Fallback is enabled for refusals; this does not mean every task used a fallback model. ### Reported statistics rank 32 ### 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, Medium) Observed 2026-10-21T16:34:56.783Z Evidence SHA-256 `43978e38f018789fa59c11de5328abe9e5905bfa9a5a4d601fa3aa4d9c153b0d` Source locator `/rows/31` |  |  |  |  |  |  |

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