Tesla's FSD v14.3.4 Brings 20% Faster Reaction Time and an Intervention-Free Streak Tracker
A rebuilt AI runtime sharpens reaction time and low-visibility handling, and a new in-app view lets drivers watch how far the car goes without a takeover.
Tesla's Full Self-Driving (Supervised) keeps getting incrementally better, and v14.3.4 — build 2026.14.6.10, which began rolling out June 13, 2026 — is a good example of the kind of under-the-hood gains that arrive free over the air.
A faster brain
The biggest change is foundational: Tesla rebuilt the AI compiler and runtime using MLIR, which it says delivers a 20% faster reaction time. The release also upgrades the reinforcement-learning stage and the vision encoder, improving how the system handles rare and low-visibility scenarios and building more accurate 3D geometry of the world around the car. In plain terms, the car perceives and responds a bit quicker and more confidently.
Smarter Summon and a streak tracker
Two owner-facing tweaks round it out. Actually Smart Summon's maximum speed rises to 8 mph (13 km/h), making low-speed self-parking maneuvers a little brisker. And a new view in the Self-Driving app shows your intervention-free streak distance — a simple but telling transparency feature that lets you see how far the car drives without needing a takeover.
Who gets it
The release targets Hardware 4 (AI4) vehicles in North America, including the Cybertruck, and rolls out in stages. As with every FSD update, it's supervised — you remain responsible for the car — but the trajectory of steady, measurable improvement is exactly what existing owners hope to see, at no added cost.
Curious whether FSD is worth it for your driving? Our calculator lets you toggle the $99/month FSD subscription into the full cost-of-ownership picture so you can see what it does to the math.
