Claude Sonnet 4
Released
Claude Sonnet 4 is an AI model released by Anthropic on Thursday, May 22 2025, 87 days after Claude 3.7 Sonnet. Benchmark results (shown below) cover BullshitBench v2, SWE-Bench Verified, and GPQA Diamond.
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Available from
| Amazon Bedrock | — | $3.00 | $15.00 | 200K |
|---|---|---|---|---|
| Amazon Bedrock | eu-west-1 | $3.00 | $15.00 | 200K |
Benchmarks
Coding
SWE-Bench VerifiedCoding — Real coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better.
72.7%
#34 of 57Best: Claude Opus 5 · 96%
Reasoning & science
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better.
75.4%
#41 of 59Best: GPT-6 Astra · 96%
Robustness
BullshitBench v2Nonsense detection — Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better.
30%
#54 of 84Best: Claude Opus 4.8 · 95%
Compare Claude Sonnet 4 with
Suggested comparisons
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Claude Sonnet 4 was released by Anthropic on Thursday, May 22 2025.
All Anthropic releases
29 tracked2026
12 releasesClaude Sonnet 5.5
Sep 28 2026
Claude Opus 5.5
Sep 22 2026
Claude Fable 5.1
Sep 1 2026
Claude Mythos 5.1
Sep 1 2026
Claude Opus 5
Jul 24 2026
Claude Sonnet 5
Jun 30 2026
Claude Fable 5
Jun 9 2026
Claude Mythos 5
Jun 9 2026
Claude Opus 4.8
May 28 2026
Claude Opus 4.7
Apr 16 2026
Claude Sonnet 4.6
Feb 17 2026
Claude Opus 4.6
Feb 5 2026