Anthropic
Claude
Claude Opus 4.1 Raises Coding and Reasoning Performance
Anthropic has released Claude Opus 4.1, a mid-cycle upgrade focused on coding accuracy, reasoning stability, and better multi-file task tracking. It delivers improved benchmark scores and enhanced real-world usability, particularly for enterprise and developer workflows. The update is live across Claude Pro, API, Bedrock, and Vertex AI with no pricing change.
Georg S. Kuklick
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August 5, 2025
Claude Opus 4.1 builds on its predecessor with key improvements in detailed reasoning, agentic task handling, and software development. It scores 74.5% on SWE-bench Verified, up from Opus 4’s 72.5%, reflecting stronger multi-step problem-solving and reliability in complex scenarios. Anthropic highlights better performance in multi-file code refactoring, workflow memory, and research-heavy tasks like data analysis and summarization.
The release is intended as a drop-in upgrade. It requires no changes for existing API users and continues to serve as the most capable Claude model. While not a major architectural shift, it marks a steady refinement of Claude’s core capabilities for developers and enterprise teams building with large-context AI. Anthropic’s iterative model strategy suggests larger upgrades are ahead, but for now, 4.1 sharpens the edge without raising costs.
