Tesla FSD V14.3.8 begins rolling out alongside 2026 Summer Update

Tesla has begun rolling out Full Self-Driving version 14.3.8, and the release is arriving alongside the company's 2026 Summer Update.

"Tesla FSD V14.3.8 is now officially starting to roll out, and it comes with the 2026 Summer Update!" Sawyer Merritt wrote on X, adding that the software was already downloading to his Model Y.

Full Self-Driving (Supervised) v14.3.8 includes:

• Upgraded the Reinforcement Learning (RL) stage of training the FSD neural network, resulting in improvements in a wide variety of driving scenarios.

• Upgraded the neural network vision encoder, improving understanding in rare and low-visibility scenarios, strengthening 3D geometry understanding, and expanding traffic sign understanding.

• Rewrote the AI compiler and runtime from the ground up with MLIR, resulting in 20% faster reaction time and improving model iteration speed.

• Mitigated unnecessary lane biasing and minor tailgating behaviors.

• Increased decisiveness of parking spot selection and maneuvering.

• Improved parking location pin prediction, now shown on a map with a P icon.

• Enhanced response to emergency vehicles, school buses, right-of-way violators, and other rare vehicles.

• Improved handling of small animals by focusing RL training on harder examples and adding rewards for better proactive safety.

• Improved traffic light handling at complex intersections with compound lights, curved roads, and yellow light stopping — driven by training on hard RL examples sourced from the Tesla fleet.

• Improved handling for rare and unusual objects extending, hanging, or leaning into the vehicle path by sourcing infrequent events from the fleet.

• Improved handling of temporary system degradations by maintaining control and automatically recovering without driver intervention, reducing unnecessary disengagements.

• Improved driver monitoring system sensitivity with better eye gaze tracking, eye wear handling, and higher accuracy in variable lighting conditions.

• Unified the model between Actually Smart Summon, FSD, and Robotaxi for more capable and reliable behavior. (New in FSD v14.3.2 for non-Cybertrucks, New in FSD v14.3.4 for the Cybertruck)

Actually Smart Summon max speed is now increased to 8mph (13km/h).(Added in FSD v14.3.3, not available on Cybertruck)

• Help Tesla improve Self-Driving by selecting an intervention reason on the main screen after taking over. (New in FSD v14.3.2)

You can now see distance traveled in FSD (Supervised) without an intervention. The Self-Driving App will also show your longest intervention-free streak. (Added in FSD v14.3.3)

• Parking options now display on the map when arriving at your destination.(Added in FSD v14.3.4)

Upcoming Improvements:

• Expand reasoning to all behaviors beyond destination handling.

• Add pothole avoidance.