Co-founder and head of xAI's Imagine team. Part of broader co-founder exodus — 9 of 11 original co-founders have now departed.

Co-founder. Part of broader exodus — 9 of 11 original co-founders have now left xAI.

Co-founder who departed on Feb 27, 2026. Part of the broader exodus where 9 of 11 original xAI co-founders have now left.

Co-founder who led the reasoning team. Departed as part of broader xAI co-founder exodus.

Co-founder who led research and safety. Part of a broader exodus where 9 of 11 original xAI co-founders departed, amid concerns about Grok's safety failures including generation of non-consensual explicit images. The safety team was completely disbanded after his departure.

Departed from Anthropic alongside Mrinank Sharma during the February 2026 safety researcher exodus. Part of a wave of departures expressing concern about the gap between Anthropic's safety commitments and competitive pressures.

Departed from Anthropic alongside Mrinank Sharma during the February 2026 safety researcher exodus. Part of a wave of departures expressing concern about the gap between Anthropic's safety commitments and competitive pressures.

Warned 'the world is in peril.' Cited a disconnect between Anthropic's stated safety values and competitive pressures driving actual decisions.

Fired after opposing ChatGPT's 'adult mode' that would allow sexually explicit conversations. Led the product policy team that develops safeguards. Said 'The allegation that I discriminated against anyone is absolutely false.'

Said he's 'pretty terrified' by the pace of AI development. Called the pursuit of AGI a 'very risky gamble with the future of humanity.'