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Anthropic: Claude Opus 5.5
modeltested · static-verifiedscore 45/100signed passport ✓published 32d ago · verified 2026-10-20
Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
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model:openrouter:anthropic/claude-opus-5.5