Tesla’s Full Self-Driving system just got a significant upgrade. The company began pushing FSD Supervised v14.3 to Early Access Program members on April 7. It is clear from the release notes that this one isn’t a minor software patch. Instead, it’s a substantial rethink of how the self-driving systems work.
New release of FSD Supervised now starting to roll out
This update brings 20% faster reaction time to further increase safety, among many other improvements
Full release notes below
Full Self-Driving (Supervised) v14.3 includes
– Upgraded the Reinforcement Learning (RL) stage…
— Tesla AI (@Tesla_AI) April 8, 2026
What exactly changed under the hood?
The headline improvement in the never-ending list of release notes is a 20% faster reaction time, which has been made possible by a complete rewrite of Tesla’s AI compiler and runtime. The automaker has achieved this using MLIR (Multi-Level Intermediate Representation). This not only benefits the current models but
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