Claude Opus 5

Anthropic•Documentation

claude-opus-5

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Anthropic's latest Opus model for complex agentic coding and enterprise work — approaching Claude Fable 5's capability at half the price ($5/$25 per million tokens). Features a 1M token context window, 128K output capacity, adaptive thinking on by default with full effort control (low through max), and stronger self-verification and error recovery so it needs less back-and-forth. Knowledge cutoff May 2026.