Head of Model Policy · OpenAI · 2025
Head of model policy, leading safety research on how ChatGPT should respond to users showing signs of mental-health distress or emotional over-reliance. Departed at the end of 2025 as OpenAI faced lawsuits over ChatGPT's handling of vulnerable users; she did not publicly criticize the company and subsequently joined Anthropic's alignment team. Her exit extended a multi-year pattern of senior safety-leadership departures from OpenAI.
Departure reported by Wired in November 2025, effective by the end of 2025. Vallone made no critical public statement; her profile reflects the documented pattern of safety-leadership departures rather than a stated protest.