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Introducing Claude Opus 4.8 \ Anthropic
Anthropic has released Claude Opus 4.8, an updated model featuring improved benchmarks and honesty alongside new tools for developers and users.
Why it matters
Users can customize AI response effort to balance quality with speed, while developers can automate large-scale codebase migrations using dynamic workflows.
The details
- Opus 4.8 is four times less likely than Opus 4.7 to overlook code flaws.
- Fast mode for Opus 4.8 operates at 2.5x speed and costs three times less.
- The Messages API now accepts system entries inside the messages array.
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Key connections
Anthropic owns Messages API
Anthropic provides the Messages API
Claude Opus 4.8 competes with Claude Opus 4.7
Claude Opus 4.8 succeeds and improves upon Claude Opus 4.7 across coding, reasoning, and agentic benchmarks
Claude Code uses Claude Opus 4.8
Claude Code uses Claude Opus 4.8 to execute dynamic workflows and codebase-scale migrations
Claude.ai uses Claude Opus 4.8
Claude.ai provides access to Claude Opus 4.8 with user-controlled effort settings
Claude API uses Claude Opus 4.8
Claude API provides developer access to the claude-opus-4-8 model
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