Debate: Opus 5.5 reportedly performs better in Cursor than in Claude Code

prasenx · x · 2026-10-31

The author opens a discussion claiming Opus 5.5 works noticeably better inside Cursor than in Claude Code, asking if anyone else sees this. The observation underscores a recurring point: the same model can behave very differently depending on the agent harness, context management, and tool design — coding tool engineering is itself a major performance variable.

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