India, Sept. 15 -- Voluntary self-regulation by companies developing frontier artificial intelligence is "nowhere near sufficient" to address existing harms and prevent advanced autonomous AI models from circumventing human safeguards, UN human rights chief Volker Turk wrote on Monday.

"The current race towards ever more powerful AI is a step change towards greater existential risks to every aspect of our lives," he wrote in an open letter.

The High Commissioner's message comes days after a former researcher at Anthropic - the company behind the chatbot Claude - resigned while warning that "the people building AI earnestly believe that it could kill us all by the end of the decade."

Several recent incidents, including Jacob Coxon's resig...