Internet sleuths have dug up old posts that appear to belong to Jacob Coxon, the former Anthropic employee who kicked the AI safety movement into overdrive with his sensational claim that the tech “could kill us all by the end of the decade.”
Coxon’s current X account, @hilbertspaess, was created in 2026, but the gumshoes found that there were two previous accounts on that platform under the same handle between 2021 and 2024. The first account has undergone several different display names. But its first name, as far back as November 2021, appears to be “Jacob Coxon” archived data shows. The evidence linking the second account made in 2023 to Coxon is more tenuous, but appear to be written in the same style and cover the same topics as the first. (One of the detectives compiled the tweets into an easily searchable database here.)
Given Coxon’s drum-beating about AI’s supposed existential risks to humankind, observers have paid particular attention to the account’s posts on climate change, something that poses a definite existential risk — not just to humans but all life on the planet — and, of course, is scientifically verified and already underway.
Tell that to Coxon, though.
