Tesla started sending out software update 2026.21.5 in early August 2026 and the package delivers Full Self-Driving v14.3.7 to cars equipped with Hardware 4. The rollout currently targets owners in the United States driving recent versions of the Cybertruck, Model 3, Model Y, and Model S. The release continues a plan to refine the system using new compiler structures and upgraded neural networks to improve the driving experience.
Upgrades to the neural network and vision
The company modified the reinforcement learning process for the software and this change helps the car handle a wider variety of driving situations on the road. The system uses an updated vision encoder to better process rare events and low-visibility conditions when drivers need it most. It can interpret 3D geometry better and it can read traffic signs more accurately too. The developers rewrote the AI compiler using MLIR to speed up the model’s reaction time by 20% so the car responds faster to sudden events.
How the car behaves on the road
How much better is the actual drive? Testers immediately noticed differences in how the car steers and makes decisions on public streets. The software avoids camping in the left lane and it limits minor tailgating behaviors behind other cars in heavy traffic. Parking spot selection happens faster and then the car plots a P icon on the screen to mark the location clearly. The vehicle responds better to emergency vehicles and school buses when they appear on the road. It reacts to small animals and drivers who violate the right of way by using fleet data to learn from these hard examples over time.
System tracking and driver monitoring
The interior camera tracks the driver’s eye movements more accurately to keep people safe. The software can track eyes through glasses and it works better under different lighting conditions during night drives. The system handles temporary internal failures by maintaining control until it recovers instead of forcing the driver to take over immediately when a minor software glitch happens. The company unified the logic running Smart Summon, self-driving, and future robotaxi functions into one single model for consistency.
Changes to the user interface
Drivers can select a reason for taking over the steering wheel right on the main screen after they intervene. The app tracks the total distance driven without human help and it logs the longest streak for owners to see. The screen displays available parking spots as the car nears the final destination so drivers can plan their next move. Owners can open a new camera preview menu at any time by going into the service settings and this lets people view any camera feed even when the car is moving.
Cybertruck gets Smart Summon
The Cybertruck finally receives Actually Smart Summon with this update after months of waiting. Owners can use the app to call the truck across parking lots or they can use the standard summon feature for simple forward and backward movements. The top speed for the Smart Summon feature remains near 8 mph to keep pedestrians safe in crowded areas.
First impressions from owners
Drivers report the car feels smoother and it commits to turns without hesitation on busy streets. The twitching steering wheel problem found in version 14.3.6 seems completely resolved and the car drives through stop signs and yield intersections confidently. It handles highway merges and on-ramps without awkward pauses that used to frustrate users. Obstacle avoidance happens faster and the car takes canyon roads with higher corner entry speeds for a natural feel.
Some drivers still experience issues during daily drives and a few testers encountered unnecessary brake taps and hesitation at changing traffic lights. The car occasionally acts indecisive around city buses and it fails to park correctly inside a garage after finding the driveway. Tesla plans to add pothole avoidance soon and they want to extend the system’s reasoning capabilities beyond just destination routing in future updates. The software still requires the driver to pay attention at all times and people must take over if the car makes a mistake.
Official release notes
FSD (Supervised) v14.3.7
Full Self-Driving (Supervised) v14.3.7 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.
- Help Tesla improve Self-Driving by selecting an intervention reason on the main screen after taking over.
- You can now see distance traveled in FSD (Supervised) without an intervention. The Self-Driving App will also show your longest intervention-free streak.
- Parking options now display on the map when arriving at your destination.
Upcoming Improvements:
- Expand reasoning to all behaviors beyond destination handling.
- Add pothole avoidance.
Camera Preview
You can now open Camera Preview at any time, even if your Tesla is not in Park.
Go to Controls > Service > Camera Preview and tap on any camera view to see it individually. Tap the grid button to switch back to all cameras.
Actually Smart Summon
ASS (Actually Smart Summon) and Dumb Summon are now available for Cybertruck!
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