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.
Anthropic has released Claude Opus 4.8, a new version of the Opus series that the company positions as an upgrade to Claude Opus 4.7 rather than an entirely new product line. Anthropic states that Opus 4.8 shows improvements across evaluations related to coding, agentic skills, reasoning, and practical knowledge work, and emphasizes that it is better suited to long-running, multi-step work that requires sustained judgment. The company also notes that Opus 4.8 is available starting today, that general usage pricing is the same as Opus 4.7, and that developers can use it through the Claude API as `claude-opus-4-8`.
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