Introducing Claude Opus 4.8

Original: Introducing Claude Opus 4.8 Product May 28, 2026 An upgrade to our Opus class of models, with stronger performance across coding, agentic tasks, and professional work, and the consistency to handle long-running work.

Claude Opus 4.8 improves coding, agentic tasks, professional work, and long-running consistency.

Anthropic introduced Claude Opus 4.8 as an upgrade over Opus 4.7, with stronger benchmark performance across coding, agentic skills, reasoning, and knowledge work. The release also adds dynamic workflows in Claude Code, effort controls in claude.ai and Cowork, and new Messages API support for system entries inside the messages array. Pricing for regular usage remains unchanged, while fast mode is now cheaper than previous models.

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