Claude Opus 4.6 is an AI model released by Anthropic on Feb 5 2026, 73 days after Claude Opus 4.5. It is the 17th tracked release from Anthropic out of 19 total.
On published benchmarks, it scores 91.3% on GPQA Diamond (graduate-level science reasoning), 80.8% on SWE-Bench Verified (real-world software engineering).
About Anthropic: AI safety company building the Claude family of models. Founded in 2021 by former OpenAI researchers.