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 while leading the product policy team that develops safeguards. Had opposed ChatGPT's planned 'adult mode' feature. OpenAI cited a discrimination allegation from a colleague as the reason for termination; Beiermeister denied the allegation and said it was retaliation for raising safety concerns.

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.'