Jacob Coxon is an ex-OpenAI and Anthropic employee who resigned and warned about AI.

Posted by The Ebro, Laura, Rosenberg Show, Sep 12, 2026Checked Nov 2, 2026

Polygraph verdictTrue

Sources: 7 support
Said: 1 time·
Confidence: 93%

The Ebro, Laura, Rosenberg ShowSep 12, 2026

Multiple tier1 and tier2 sources confirm that Jacob Coxon spent about three years doing pretraining research at both OpenAI and Anthropic, then resigned from Anthropic in September 2026 with a public warning that AI firms are 'gambling with our lives.' The claim's wording matches the post's own description, and no source contradicts it.

What we found

Supports. The AP report says Coxon, who spent three years doing research at both Anthropic and OpenAI, resigned from Anthropic over concerns that AI firms are not acting responsibly.[1][3]

Supports. Reuters describes Coxon as a former Anthropic researcher who quit the company over safety concerns and warned AI could kill us all by the end of the decade.[2]

Supports. Time reports that Coxon's viral post said 'I resigned from Anthropic today' and that he had spent three years on pretraining research at both OpenAI and Anthropic.[4]

Supports. Several outlets, including Politico, NZ Herald and Newsweek, describe Coxon as a former OpenAI staffer who joined Anthropic, resigned, and warned that AI firms are gambling with lives.[5][6][7]

Context. The post's phrasing 'ex open AI and Anthropic employee' matches the sources' account of the employment history, so the extraction adds nothing the passage does not say.