Tesla FSD v14.3 rollout

Tesla is pushing a new driving update while still reminding drivers to keep both hands ready. Full Self-Driving (Supervised) is Tesla’s driver-assistance software, and Tesla’s own page says the car can drive “almost anywhere” only with active human supervision and minimal intervention, not as a robotaxi. (tesla.com) The new rollout is Full Self-Driving (Supervised) v14.3, bundled inside software build 2026.2.9.6, and Tesla-focused trackers reported the release notes on April 7 and April 8 as it started reaching early users. Tesla said the update improves reaction time by about 20%. (teslaoracle.com) A reaction-time claim sounds small until you picture a car deciding whether to brake, steer, or keep rolling through a yellow light in a fraction of a second. Tesla tied that speedup to a rewritten artificial intelligence compiler and runtime, which are the software layers that turn a trained driving model into instructions the car’s onboard computer can actually execute. (teslaoracle.com) Tesla says that rewrite uses Multi-Level Intermediate Representation, usually shortened to MLIR, which is a framework engineers use to translate complex machine-learning models into code that runs efficiently on specific chips. In plain English, it is closer to rebuilding the engine room than repainting the dashboard. (teslaoracle.com) The release notes also point to changes in how the system was trained, including an upgraded reinforcement-learning stage for the driving neural network. Reinforcement learning is the method where software improves by getting scored on choices, a bit like a student learning faster when every decision gets instant feedback. (evshift.com) That matters because most driver complaints are not about whether the car sees the road at all. They are about awkward judgment calls like stopping too hard at yellow lights, hesitating at four-way stops, or parking like a nervous teenager on a road test. (teslarati.com) Early Access Program testers who got v14.3 this week said those exact behaviors looked better, with smoother yellow-light decisions, less disruptive stop-sign behavior, and stronger parking performance in first-impression drives published on April 7 and April 8. Those are anecdotal reports, but they match the kinds of edge cases Tesla highlighted in the release notes. (teslarati.com) (notateslaapp.com) The timing is awkward for Tesla in a familiar way. On April 6, Reuters reported that the National Highway Traffic Safety Administration closed a probe covering about 2.6 million Tesla vehicles over Actually Smart Summon, which is the feature that lets an owner move the car remotely in parking lots with a phone. (claimsjournal.com) (finance.yahoo.com) That closure does not mean regulators blessed every Tesla automation claim. Reuters said the agency ended that specific investigation after software updates and noted the reported incidents involved minor crashes in low-visibility conditions, with no injuries or deaths. (claimsjournal.com) (finance.yahoo.com) So v14.3 lands in the middle of two stories at once: Tesla is still shipping meaningful under-the-hood changes to make the system quicker and smoother, and the company is still operating under a microscope where every improvement claim sits next to a supervision warning. That is why a compiler rewrite and a regulator’s closed file can both matter in the same week. (tesla.com) (teslaoracle.com) (finance.yahoo.com)