Opus_4_6
Claude Opus 4.6 is a frontier model with strong capabilities in software engineering, agentic tasks, and long context reasoning, as well as in knowledge work—including financial analysis, document creation, and multi-step research workflows.
thinking: {type: "enabled", budget_tokens: N} is deprecated on Opus 4.6. Migrate to thinking: {type: "adaptive"} with the effort parameter.
200K context window Knowledge cutoff: August 2025