Claude Opus 4.5 Released
Narrative
Best model in the world for coding, agents, computer use. 80.9% SWE-bench Verified (first to break 80%). 66.3% OSWorld. Hybrid reasoning with configurable effort levels. 200K context window.
Reality
Beat all competitors on coding benchmarks. Scored higher than any Anthropic job candidate on internal 2-hour performance engineering test. 67% price reduction vs Opus 4 ($5 input/$25 output). Endless chat with automatic context compaction. Available day-one across apps, API, cloud platforms.
Implication
Reclaimed coding crown from Gemini 3. State-of-the-art agentic workflows. Token efficiency breakthrough: 76% fewer tokens at medium effort vs Sonnet 4.5. Enterprise adoption surge with Microsoft Foundry, AWS Bedrock, Vertex AI. Terminal-Bench 15% improvement. Completes 4.5 family (Haiku, Sonnet, Opus).