Wire · technology
Tesla FSD v15 Early Build Now Running on Robotaxi Fleet-
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Fusion42 · 26 July 2026 · Fusion42 review
Tesla has deployed FSD v15 early build to its Robotaxi fleet across six US cities, with 380,000+ miles accumulated and a safety record. The system is 40% complete with a tenfold parameter increase; full rollout expected late 2026 or early 2027, and FSD v15 will be exclusive to Hardware 4 vehicles, effectively orphaning older Hardware 3 users.
This Wire brief sits within Fusion42's coverage of Autonomous Vehicles, and 2 sources have reported it between 23 Jul 2026 and 26 Jul 2026.
◆ ◆ The Wire takeaway
Tesla just locked FSD v15 to Hardware 4 only, killing support for Hardware 3 forever. If you're building sensors, compute modules, or fleet management software for autonomous vehicles, you now know the hardware generation your customers will be forced to upgrade—and when.
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2 sources · first reported 23 Jul 2026 · latest 26 Jul 2026
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