Summary
Cursor Router, the request-level classifier behind Auto mode, added Auto Intelligence and Auto Balance presets that now learn continuously from production traffic and route to newer models including Claude Opus 5. Cursor reports Auto Intelligence reaching Fable-level satisfaction at about 68% lower cost and Auto Balance beating Opus 4.8 at about 41% lower cost.
What changed
Launched July 22, 2026 with Intelligence, Balance, and Cost modes plus team allowlists; updated August 6, 2026 so the router predicts each model's expected quality and cost, learns continuously from production outcomes, and adds Opus 5 to the routing mix. Reported results: Auto Intelligence about 68% lower cost at Fable-level satisfaction, and Auto Balance above Opus 4.8 at about 41% lower cost.
Why it matters
Routing that adapts to live usage lets teams track the frontier and cut spend without changing workflows, turning model choice into a policy dial and an optimized, invisible layer. As frontier and mid-tier models converge, routing becomes the main lever for controlling AI coding cost and a competitive moat for the tool that routes best.
Evidence excerpt
Cursor Router becomes more adaptive by predicting each model's expected quality and cost, learning from production outcomes, and updating continuously.