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Anthropic's Claude 5 workhorse — 1M context at frontier-adjacent quality.
Claude Sonnet 5 is Anthropic's mid-tier Claude 5 model, pairing a 1M-token context window with pricing held at $2 per million input tokens and $10 output — Anthropic explicitly cancelled a scheduled price increase to $3/$15 that had been set for 1 September 2026.
| Benchmark | Official | Community avg |
|---|---|---|
| GPQA Diamondreasoning | 96.2 % | — |
| OSWorld-Verifiedagent | 88.3 % | — |
| SWE-bench Verifiedcode | 82.1 % | — |
“Official” values are editor-approved and feed the ranking. “Community avg” is the mean of member submissions (shown for transparency; it never affects the ranking until an editor approves a value).
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Updated 9/1/2026
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