Claude Opus 5
Released on July 24, 2026
Changes from previous version
Largest leap in the Opus family since 4.5: more than doubles Opus 4.8 on Frontier-Bench at lower cost per task, approaches Fable 5 on CursorBench at half the cost, adds 1M-token context support, and becomes Anthropic's most aligned Opus model to date while keeping Opus 4.8-level safeguards.
Release Summary
Major Opus-tier upgrade that approaches Claude Fable 5 frontier intelligence at half the price. State-of-the-art on coding and knowledge work evaluations including Frontier-Bench and GDPval-AA, with strong gains in agentic thoroughness, visual outputs, and scientific research. New default on Claude Max and strongest model on Claude Pro. Supports up to a 1M-token context window. Same API pricing as Claude Opus 4.8 at $5/M input and $25/M output, plus Fast mode at 2.5x speed. Available as claude-opus-5 on the Claude API.
Timeline
Claude Opus 5 released
Anthropic releases Opus 5 across Claude apps, Claude Code, and the Claude API as claude-opus-5, with benchmark gains over Opus 4.8 and near-Fable performance at Opus pricing.