Tesla is officially clearing the air regarding the future of its self-driving hardware. During the Q1 2026 Earnings Call on Wednesday, CEO Elon Musk confirmed that the upcoming Full Self-Driving (FSD) v15 will be compatible with current AI4 (Hardware 4) computers, putting an end to months of community speculation.
The news serves to allay growing fears that the next generational leap in software might require Tesla's upcoming AI5 hardware. Many enthusiasts were concerned that the current AI4 suite, which features a relatively modest 16GB of memory, wouldn't have the "headroom" to run the massive new models Tesla has in development. However, Musk’s comments confirm that the current fleet is still very much in the race for total autonomy.
Software Overhaul And a 10-Billion-Parameter Model
The anxiety around hardware compatibility wasn't unfounded. Back in August 2025, Musk teased a massive "10x parameter" upgrade, moving from a 1-billion-parameter model to a significantly more complex 10-billion-parameter version. While this was originally slated to debut late last year with FSD v14, Tesla recently shifted that model upgrade to FSD v15.
Because AI5 chips are expected to feature a drastic increase in onboard memory, many assumed the delay was because the 10-billion-parameter model simply wouldn't fit on current cars. Musk has now put that theory to rest. While AI5 will eventually offer more power for Tesla’s engineers to utilize, the software overhaul coming with v15 is being designed to squeeze every ounce of performance out of the existing Hardware 4 units.
Safer Than a Human: The Road to v15
During the call, Musk was confident about the current state of the software, noting that Tesla’s vehicles are all autonomy-ready, and 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 continues to bring Tesla owners closer to unsupervised autonomy.
However, v15 represents a total architectural overhaul intended to take safety to another level — 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 wants to finish training and validating v15 before pushing for larger-scale 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 move to end-to-end neural networks.
Timeline
The 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 proves that Tesla’s strategy of "distillation" — shrinking complex AI models to fit on automotive-grade hardware — is still bearing fruit.
As Tesla prepares for mass production of AI5 next year, the current fleet remains the primary focus for achieving unsupervised autonomy. When Tesla talked about the timeline for FSD v15, Musk said that 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.
