Tesla Confirms FSD v15 Will Run on HW4, Shares Release Timeline

Tesla clarified its self-driving hardware roadmap during the Q1 2026 Earnings Call, with CEO Elon Musk confirming that the upcoming Full Self-Driving (FSD) v15 will be compatible with current AI4 (Hardware 4) computers, ending months of community speculation.

The announcement eases concerns that the next major software step would require Tesla’s upcoming AI5 hardware. Many enthusiasts were worried that the AI4 suite, which features 16GB of memory, wouldn’t have the "headroom" needed to run the large new models in development. Musk’s remarks confirm that the existing fleet remains very much in the race for total autonomy.

Software Overhaul and a 10-Billion-Parameter Model

In August 2025, Musk teased a "10x parameter" upgrade, moving from a 1-billion-parameter model to a significantly larger 10-billion-parameter version. It was initially slated to debut late last year with FSD v14 but was later shifted to FSD v15.

Because AI5 chips are expected to bring a major increase in onboard memory, many assumed the delay meant the 10-billion-parameter model wouldn’t fit on current cars. Musk has now put that theory to rest. While AI5 will eventually offer more power for engineers to use, the v15 overhaul is being designed to extract maximum performance from existing Hardware 4 units.

Safer Than a Human: The Road to v15

Musk expressed confidence in the current software, noting that Tesla’s vehicles are autonomy-ready and that v14 is already safer than human drivers. The recently released FSD v14.3 has already shown impressive smoothness and faster reactions in real-world testing, and each point release brings owners closer to unsupervised autonomy.

Even so, v15 represents a total architectural overhaul intended to elevate safety by orders of magnitude beyond human capability. Musk said that Unsupervised FSD will debut on a version of v14 or v15 where it is legal, but Tesla aims to finish training and validating v15 before broader Unsupervised FSD and Robotaxi deployments. FSD v15 is targeted to launch at the end of 2026 or the start of 2027, making it the most significant software milestone since the shift to end-to-end neural networks.

Timeline

Confirmation that v15 will run on HW4 is a relief for the millions of owners who have recently taken delivery of a new Model 3, Model Y, or Cybertruck. It demonstrates Tesla’s strategy of "distillation" shrinking complex AI models to fit on automotive-grade hardware is still paying off.

As Tesla prepares for mass production of AI5 next year, the current fleet remains the primary focus for achieving unsupervised autonomy. Discussing timing, Musk said Tesla is targeting the end of 2026, or start of 2027, which would bring a complete architectural overhaul. FSD v14.3.2 already includes major updates with a new unified model, and FSD v15 is expected to bring increased safety.