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.
Available from
| Amazon Bedrock | — | $3.00 | $15.00 | 200K |
|---|---|---|---|---|
| Amazon Bedrock | eu-west-1 | $3.00 | $15.00 | 200K |
| — | $3.00 | $15.00 | 1M | |
| eu | $3.00 | $15.00 | 1M | |
| global | $3.00 | $15.00 | 1M |
Benchmarks
Coding
Reasoning & science
Robustness
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Frequently asked questions
Claude Sonnet 4 was released by Anthropic on Thursday, May 22 2025.
Claude Sonnet 4 was built by Anthropic. AI safety company building the Claude family of models. Founded in 2021 by former OpenAI researchers.
Claude Sonnet 4 reports 3 tracked benchmark scores — BullshitBench v2: 30%; SWE-Bench Verified: 72.7%; GPQA Diamond: 75.4%. Scores are the figures published at release by Anthropic.
No. Claude Sonnet 4 is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.
Anthropic's previous tracked release was Claude 3.7 Sonnet on Feb 24 2025, 87 days earlier. It was followed by Claude Opus 4 on May 22 2025.