MAMBO Explains
An Anthropic researcher just resigned in public, and the industry's reaction says more than his warning did
Jacob Coxon, a 27 year old pretraining researcher who worked at both OpenAI and Anthropic over three years, resigned from Anthropic on September 9, 2026, and posted a seven part message on X warning that frontier AI labs are racing toward self improving superintelligence without adequate safeguards.