Cursor Router Adds Auto Intelligence and Auto Balance, Pulling Opus 5 Into Automatic Model Selection

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Cursor shipped Cursor Router with two modes, Auto Intelligence and Auto Balance, which route each request to a model based on production traffic feedback rather than a static rule, with the stated goal of raising satisfaction while lowering cost. Opus 5 is now part of the routing pool. This is the same heterogeneous-routing pattern practitioners have been hand-building — expensive model for reasoning, cheap model for mechanical subtasks — moved into the editor as a managed default; the tradeoff is you no longer know which model wrote a given diff.