Tesla CEO Elon Musk said FSD v15 is expected by the end of 2026, and he described it as a full overhaul of the software architecture. And he said the new version will run on AI4, or Hardware 4, which answers a key question for owners waiting to see if Tesla’s current computer will support the next major release.
During Tesla’s Q1 2026 earnings call, Musk stated that the next iteration of FSD will be a “complete overhaul of the software architecture” and will debut on AI4 units, potentially by the end of 2026 or early 2027. This announcement dispels long-standing speculation that Tesla’s next-gen FSD software would require the upcoming AI5 hardware, which is expected to feature significantly more onboard memory.
Musk emphasized that this architectural overhaul will enable “unsupervised FSD anywhere in the world that it is legal to do so,” with the primary goal of dramatically increasing safety levels beyond human capabilities. Current FSD v14.3 has already demonstrated impressive smoothness and reaction times in real-world testing, and minor point releases continue to refine the experience. However, v15 represents a quantum leap, designed to handle complex, unsupervised driving scenarios globally.
What changes in V15
Recent reports linked v15 to a much larger AI model, with Musk saying the upgrade will bring about a 10x increase in parameters compared with Tesla’s smaller model. And in Musk’s telling, once v15 is in place, the main task becomes pushing the safety rate higher rather than rebuilding the core software stack again.
For AI4 owners, that point stands out. The company is now saying its next major FSD architecture change is planned for hardware already in customer cars.
Legal path
The legal side still sets the pace outside the United States. A new UN automated driving regulation could help open parts of Europe and Asia to advanced self-driving systems, though any wider Tesla rollout would still depend on local approval.
And Musk’s phrasing was careful on that front. He said unsupervised FSD can go anywhere it is legal to do so, which leaves regulators as a major factor in the timing of any broad launch.
In January, Musk said Tesla may need about 10 billion miles of driving data to validate safe unsupervised FSD, so v15 looks like a major step in the program rather than the final chapter.
So, FSD v15 is coming to AI4, the software stack is being rebuilt, and the company is still aiming at unsupervised driving where regulators permit it.
You may also like to read:
- Tesla teases V15 update with 10x larger unsupervised AI system »
- Tesla launches unsupervised Robotaxi rides in Austin »
- Musk says Tesla’s HW4 cars are ready for unsupervised FSD »
We’ve launched an official Tesla Owners Online Forum. Join early and claim your "Founding Fuel" badge.
