Claude Opus 4.8 is an AI model released by Anthropic on May 28 2026, 42 days after Claude Opus 4.7. Benchmark results (shown above) cover SWE-Bench Pro, Terminal-Bench 2.1, Humanity's Last Exam, OSWorld-Verified, Finance Agent v2, and GDPval-AA.
About Anthropic: AI safety company building the Claude family of models. Founded in 2021 by former OpenAI researchers.