FSD 14.3 rollout

Tesla has started rolling out a new Full Self-Driving build, v14.3, with Tesla saying the update cuts reaction time by about 20%. (electrek.co) The company’s support pages describe Full Self-Driving as a supervised driver-assistance system, not an autonomous one, and say it is currently offered for $99 a month in the U.S. and several other markets. (tesla.com) Tesla says v14.3 ships on software build 2026.2.9.6 for Hardware 4 Model S, Model 3, Model X, Model Y and Cybertruck vehicles. The release notes say Tesla rewrote the artificial-intelligence compiler and runtime with MLIR, a software layer used to turn models into code that runs on the car. (electrek.co) The same notes say Tesla upgraded reinforcement-learning training and the vision encoder, which is the part of the system that turns camera images into a machine-readable scene. Tesla says those changes improve low-visibility driving, traffic-sign understanding and 3D geometry perception. (electrek.co) Tesla also says v14.3 reduces unnecessary lane bias and minor tailgating, improves parking-spot selection, and adds a map pin for predicted parking locations. Other listed changes include better behavior around emergency vehicles, school buses, yellow lights and small animals. (electrek.co) The rollout lands as Tesla keeps widening access to its supervised driving software after pushing v14 features through trials and subscriptions. Tesla’s v14 trial page said eligible owners in the U.S., Puerto Rico, Mexico and Canada could test v14 features on software version 14.2 or later, though that specific trial is now closed to new and existing owners. (tesla.com) Tesla’s public product page says the system can handle route navigation, lane changes and parking under active supervision, while its support page says drivers must stay attentive and ready to take over at all times. The company says currently enabled features do not make the vehicle autonomous. (tesla.com 1) (tesla.com 2) Independent verification of the 20% reaction-time claim was not available in Tesla’s published materials reviewed here. Early user reactions cited by Tesla watchers and social posts have focused less on raw speed than on smoother behavior, including one description of a “gentle, cradling” ride in v14.3.2. (electrek.co) (x.com 1) (x.com 2) For Tesla owners, the immediate change is not a driverless car but a faster and potentially calmer supervised one. For Tesla, the more important line in the release notes may be the compiler rewrite, which the company says should also speed up future model updates. (tesla.com) (electrek.co)