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Claude Opus 5.5 Arrives in Cursor as New CursorBench Leader at 57.8%

  • Software Dev & Coding
  • Foundation Models
  • AI Agents

Cursor has added Anthropic's Claude Opus 5.5, giving developers access to the new model inside the coding agent and placing it first on CursorBench 4.0 at 57.8% in Max mode. The launch pairs a higher measured coding score with a lower default-effort cost profile, though Cursor's own leaderboard shows cost varies sharply by effort setting.

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