Tesla begins FSD Supervised v14.3.3 rollout

Tesla has begun sending Full Self-Driving (Supervised) v14.3.3 to some vehicles, according to release-note pages and owner-run trackers that logged installs through May 22. The build appears as software version 2026.14.6.6 and, as of the latest tracker snapshots, remained a limited deployment rather than a fleetwide push. The update drew fresh attention after posts on X on May 21 said v14.3.3 was reaching users and pointed to rollout logs. Separate Tesla-focused tracking pages published in recent days also described the release as the start of a new rollout and tied it to Tesla’s broader Spring 2026 software update. Tesla’s own published notes, as mirrored by software-tracking sites, frame v14.3.3 as both a driving-model update and a feature merge. (notateslaapp.com) The notes say the release adds Spring Update features to vehicles already on the FSD v14.3 branch and “increments the FSD version to 14.3.3.” ### What is actually in v14.3.3? Tesla’s release notes list changes to the neural-network stack, parking behavior, emergency-vehicle response and driver-facing stats. (notateslaapp.com) The company says it upgraded the reinforcement-learning training stage, upgraded the vision encoder, mitigated unnecessary lane biasing and minor tailgating, and improved handling for rare objects, low-visibility situations and temporary system degradations. (notateslaapp.com) One of the most specific claims in the notes is a performance number. Tesla says it “rewrote the AI compiler and runtime from the ground up with MLIR,” resulting in “20% faster reaction time” and faster model iteration. The release also adds two visible user-facing items. Tesla says Actually Smart Summon’s maximum speed rises to 8 mph, excluding Cybertruck, and the Self-Driving App now shows distance traveled without an intervention plus the driver’s longest intervention-free streak. (notateslaapp.com) ### How broad is the rollout so far? Not a Tesla App’s release-note page showed 62 cars and 0.5% of fleet in one snapshot, with 13 installs logged that day. (notateslaapp.com) TeslaFi’s broader firmware tracker also showed version 2026.14.6.6 / FSD 14.3.3 as a small slice of observed installs compared with the far larger 2026.14.6 branch. TeslaFi’s tracker listed individual update reports across U.S. states including Oregon, Texas, Michigan, New Jersey and California, alongside some international entries. (notateslaapp.com) Those logs show the software moving, but still in relatively small numbers compared with Tesla’s main active branches. ### Why are Tesla owners talking about a “branch merge”? Not a Tesla App reported on May 17 that software version 2026.14.6.6 combined FSD v14.3.3 with the Spring 2026 feature set. (notateslaapp.com) That mattered because some FSD testers had been waiting for newer interface and infotainment changes that were already appearing on other software branches. (teslafi.com) The same report said the update brought the new Self-Driving app, xAI assistant wake-word support, rear-screen navigation improvements and other Spring Update features to cars on the latest self-driving branch. That description matches the release-note language showing Spring Update features being added to vehicles on FSD v14.3. (notateslaapp.com) ### What about the other details circulating in the same social posts? Posts on X that mentioned v14.3.3 also referred to Tesla’s Signature Edition Model S and Model X delivery event and cited TSLA trading around $404.11 on May 21. Independent coverage said Tesla had rescheduled that Signature Edition event to May 20 at the Fremont factory in California. Market-data pages show Tesla stock closed May 21 at $417.85, indicating the social-media price reference was an intraday figure rather than the official closing price. (notateslaapp.com) May 22 tracker pages still showed v14.3.3 as an active but limited rollout, with software version 2026.14.6.6 the identifier owners can watch for. Tesla’s release-note pages and owner trackers remain the clearest places to monitor whether the company expands the build beyond the early set of vehicles now logging installs. (notateslaapp.com 1) (notateslaapp.com 2)