Anthropic Unveils Claude Opus 4.1 with Major Upgrades in Coding and Reasoning
Opus 4.1 pushes coding performance to new heights, achieving 74.5% on SWE-bench Verified.
Anthropic has released Claude Opus 4.1, a significant upgrade to its flagship model, bringing improvements in agentic reasoning, real-world coding, and research capabilities. Now available to paid Claude users via Claude Code, API, Amazon Bedrock, and Google Cloud Vertex AI, the model retains the same pricing as Opus 4.
The startup unveiled Claude 4.0 Sonnet and Claude 4.0 Opus—at the Code w/Claude event in May.
Opus 4.1 pushes coding performance to new heights, achieving 74.5% on SWE-bench Verified, with enhancements in multi-file refactoring and pinpoint bug correction.
Notably, Rakuten Group highlighted its ability to make precise changes in large codebases without introducing bugs, while Windsurf reported a full standard deviation improvement in junior developer performance benchmarks over the previous version.
Opus 4.1 also delivers more reliable agentic search and data analysis, making it ideal for in-depth research tasks.
Developers are encouraged to switch to the new model via API and explore the updated system card, docs, and model details.
Today we're releasing Claude Opus 4.1, an upgrade to Claude Opus 4 on agentic tasks, real-world coding, and reasoning. pic.twitter.com/25vh0b3FsX
— Anthropic (@AnthropicAI) August 5, 2025
The models Claude Sonnet 4 and Claude Opus 4, are now generally available in GitHub Copilot, expanding the coding assistant’s capabilities with powerful AI tools for developers.
