Tesla Rolls Out FSD v14.3.12 With Halloween Mode and 20% Faster Reaction

Tesla is deploying update 2026.38.5 with FSD v14.3.12. The FSD AI compiler and runtime were rewritten with MLIR, cutting reaction time by 20%, while new features include Halloween Mode, Automatic Collision Evasion and Emergency Drive Away for departing with a Supercharger cable attached.

• AI compiler and runtime rewritten with MLIR: FSD reaction time improved 20%
• HW4 V14 intelligence distilled into HW3, bringing RL improvements to older cars
• Emergency Drive Away lets drivers shift to Drive with a Supercharger cable connected
• Adds Halloween Mode, Arrival Energy in the mobile app and auto-adjusting low beams