Tesla has started rolling out Full Self-Driving (Supervised) v14.3 to HW4 vehicles, and the headline change is under the hood: Tesla rewrote the AI compiler and runtime from scratch on MLIR, which the automaker says delivers a 20% faster reaction time.
The update, shipping as software version 2026.2.9.6, also brings a new parking spot pin on the map, better behavior around emergency vehicles and school buses, and Tesla’s first public acknowledgement that it’s leaning on MLIR — the compiler infrastructure built by Chris Lattner, who briefly led Tesla Autopilot back in 2017.
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