Claude Opus 4.1 Anthropic

Today we’re releasing Claude Opus 4.1, an improve to Claude Opus 4 on agentic duties, real-world coding, and reasoning. We plan to launch considerably bigger enhancements to our fashions within the coming weeks.

Opus 4.1 is now obtainable to paid Claude customers and in Claude Code. It’s additionally on our API, Amazon Bedrock, and Google Cloud’s Vertex AI. Pricing is similar as Opus 4.

Claude Opus 4.1

Opus 4.1 advances our state-of-the-art coding efficiency to 74.5% on SWE-bench Verified. It additionally improves Claude’s in-depth analysis and information evaluation expertise, particularly round element monitoring and agentic search.

GitHub notes that Claude Opus 4.1 improves throughout most capabilities relative to Opus 4, with significantly notable efficiency positive factors in multi-file code refactoring. Rakuten Group finds that Opus 4.1 excels at pinpointing actual corrections inside giant codebases with out making pointless changes or introducing bugs, with their group preferring this precision for on a regular basis debugging duties. Windsurf stories Opus 4.1 delivers a one commonplace deviation enchancment over Opus 4 on their junior developer benchmark, exhibiting roughly the identical efficiency leap because the soar from Sonnet 3.7 to Sonnet 4.

Getting began

We suggest upgrading from Opus 4 to Opus 4.1 for all makes use of. If you’re a developer, merely use claude-opus-4-1-20250805 through the API. You may discover our system card, mannequin web page, pricing web page, and docs to study extra.

As at all times, your suggestions helps us enhance, particularly as we proceed to launch new and extra succesful fashions.