anthropicReleased 20 days ago
Anthropic: Claude Sonnet 5.5
Tuned for quick iteration on scoped fixes and documents; Anthropic favors Opus 5.5 for open-ended work needing sustained judgment.
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Tuned for quick iteration on scoped fixes and documents; Anthropic favors Opus 5.5 for open-ended work needing sustained judgment.
Always-on adaptive thinking defaults to medium effort; built for sustained work across large codebases and professional documents.
Beta controls change effort per message without invalidating the prompt cache and report progress between tool calls.