When was Claude 3.7 Sonnet released?

Claude 3.7 Sonnet was released by Anthropic on Monday, Feb 24 2025.

Who made Claude 3.7 Sonnet?

Claude 3.7 Sonnet was built by Anthropic. AI safety company building the Claude family of models. Founded in 2021 by former OpenAI researchers.

What benchmark scores did Claude 3.7 Sonnet get?

Claude 3.7 Sonnet reports 3 tracked benchmark scores — BullshitBench v2: 49%; SWE-Bench Verified: 62.3%; GPQA Diamond: 68%. Tracked scores may come from lab reports or independent benchmarks; source details accompany the benchmark data.

Is Claude 3.7 Sonnet open source?

No. Claude 3.7 Sonnet is a closed model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.

What came before and after Claude 3.7 Sonnet?

Anthropic's previous tracked release was Claude 3.5 Sonnet (upgraded) on Oct 22 2024, 125 days earlier. It was followed by Claude Sonnet 4 on May 22 2025.

Claude 3.7 Sonnet

Released Feb 24 2025

Claude 3.7 Sonnet is an AI model released by Anthropic on Monday, Feb 24 2025, 125 days after Claude 3.5 Sonnet (upgraded). Benchmark results (shown below) cover BullshitBench v2, SWE-Bench Verified, and GPQA Diamond.

Benchmarks

Coding

SWE-Bench Verified

62.3%

#47 of 59

Reasoning & science

GPQA Diamond

68%

#51 of 61

Robustness

BullshitBench v2

49%

#40 of 97

Compare Claude 3.7 Sonnet with

Claude 3.7 Sonnet

Suggested comparisons

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About

Claude 3.7 Sonnet, released February 24, 2025, was Anthropic's first hybrid reasoning model: a single model that could answer instantly or engage an extended-thinking mode where it reasons step by step before responding, with the thinking budget under API control. It launched alongside the first research preview of Claude Code, Anthropic's agentic command-line coding tool.

The reasoning upgrade showed up most clearly in software engineering, where Claude 3.7 Sonnet scored 62.3% on SWE-Bench Verified — up from 49.0% for its predecessor and the best published score of any model at the time. GPQA Diamond rose to 68.0%. It held the top of the Claude lineup for three months until Claude Sonnet 4 and Opus 4 arrived in May 2025.

Frequently asked questions

: Claude 3.7 Sonnet was released by Anthropic on Monday, Feb 24 2025.
: Claude 3.7 Sonnet was built by Anthropic. AI safety company building the Claude family of models. Founded in 2021 by former OpenAI researchers.
: Claude 3.7 Sonnet reports 3 tracked benchmark scores — BullshitBench v2: 49%; SWE-Bench Verified: 62.3%; GPQA Diamond: 68%. Tracked scores may come from lab reports or independent benchmarks; source details accompany the benchmark data.
: No. Claude 3.7 Sonnet is a closed 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 3.5 Sonnet (upgraded) on Oct 22 2024, 125 days earlier. It was followed by Claude Sonnet 4 on May 22 2025.