What's new in Claude Opus 4.7 - Claude API Docs
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Overview of new features, breaking changes, and behavior changes in Claude Opus 4.7.
Overview of new features and behavior changes in Claude Opus 5. Claude Opus 5 is a step-change improvement over Claude Opus 4.8, with the largest gains in deep reasoning, agentic and long-horizon tasks, and test-time compute scaling. This page summarizes everything new in Claude Opus 5, including mid-conversation tool changes and two breaking changes for code running on Claude Opus 4.8: thinking is on by default, and thinking can be disabled only at effort high or below. New model ModelAPI model IDDescription Claude Opus 5claude-opus-5For complex agentic coding and enterprise work…
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