Tesla has begun rolling out Full Self-Driving (Supervised) v14.3.5 in firmware 2026.20.6.6, the newest step in the v14.3 branch for Hardware 4 cars. The build is the first in the series to unlock an on-demand camera preview and ships a rebuilt AI runtime that Tesla says sharpens the car's reactions on the road.
Camera Preview, on demand
The headline addition is Camera Preview. Owners can now open any individual camera feed at any time through Controls > Service > Camera Preview, including while the car is not in Park. Until now, live camera views were tied to specific functions such as Sentry or the reversing display, so being able to check a single feed on demand is a genuinely new capability rather than a tweak to an existing one.
A faster driving stack
The bigger change is under the surface. Tesla rewrote the AI compiler and runtime from the ground up using MLIR, which it says delivers a 20% faster reaction time and speeds up how quickly it can iterate on new models. The release also upgrades the reinforcement-learning stage and the neural-network vision encoder that turns camera pixels into the car's understanding of the world.
Smarter at complex intersections
Traffic-light handling has been reworked for the situations that trip up earlier builds: compound signals with multiple lights, lights on curved approaches, and deciding whether to stop on a yellow. Tesla credits training on hard examples mined from its fleet for the improvement.
Tracking your intervention-free streak
The Self-Driving section of the app now surfaces how far you have travelled on FSD (Supervised) without an intervention, and records your longest intervention-free streak. Actually Smart Summon also gets a small bump, with its top speed raised to 8 mph (13 km/h).
Carried over from 2026.20
Several features that first appeared in the 2026.20 update travel forward in this build: encrypted Dashcam clips keyed to your vehicle, Parental Controls that can block the Browser, Theater and Arcade while in Park, Blind Spot Warning While Parked, and the "Hey Grok" voice assistant.
Rollout and hardware
Version 14.3.5 is a Hardware 4 release and lands as an early, staged rollout rather than a wide push. Owners of older Hardware 3 cars remain on the separate v14 Lite branch that Tesla introduced in 2026.20.5.1. As always with FSD (Supervised), the driver stays responsible for the car at all times.
What it means for European owners
For Hardware 4 owners in Europe, the picture is split. Comfort and convenience features such as Camera Preview, encrypted Dashcam clips and Parental Controls arrive with the firmware regardless of local rules. The supervised driving stack itself, however, only becomes usable where regulators have signed off — a list that now includes the Netherlands, Belgium and Denmark, with more countries filing applications. So European drivers get the new tooling immediately, while the reworked driving behaviour matters most in the markets where FSD (Supervised) has already cleared approval. Where it has not, the update still improves the parts of the software Europeans can use today, and positions cars for the driving features to switch on as national approvals land.