Elon Musk praised Tesla's AI as the best in real-world applications, but former employee Lukasz Krupski challenged the safety of Tesla's Autopilot feature, citing public road safety concerns. Krupski leaked confidential Tesla data revealing customer complaints about the Autopilot system, including sudden accelerations and phantom braking. Tesla's legal team dismissed Krupski as a disgruntled ex-employee who misused his position. The leaked data included reports of accidents while Autopilot was engaged.