A New Tab Model
BlogCursor TeamJun 14, 2025
AI Summary
Cursor's engineering post on the Fusion Tab model — next-edit prediction, not just next-token autocomplete. Predicts where the cursor will move, which files will be touched, and which lines around the current edit will need changes. ~25% better at difficult edits per line and ~10x longer suggestion stretches than the original 2024 release, deployed via online RL with multiple model rollouts per day. The harness pattern for pre-emptive small edits that complements long-running agent mode.
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