A widely shared post compresses Jack Clark’s career into a tidy story: a Bloomberg journalist takes a few months off to study artificial intelligence and winds up co-founding Anthropic. The documented timeline is different. Clark was already Bloomberg’s specialist AI reporter before he moved directly to OpenAI in 2016.
The move from reporting to OpenAI
Clark’s CV filed with Congress lists him at Bloomberg and BusinessWeek from August 2014 through August 2016, where he specialized in leading the newsroom’s AI coverage. The next entry begins in September 2016 at OpenAI. There is no months-long gap between the jobs in that record.
Alistair Barr, Clark’s editor at Bloomberg, recalled the departure in 2025. Clark told him that he was leaving to join OpenAI, then a young and relatively obscure nonprofit. Barr tried to talk him out of it. He also wrote that Clark had been “obsessed” with AI in 2015 and repeatedly pushed to cover the field.
Clark stayed at OpenAI for more than four years, working in strategy and communications before becoming policy director, according to Barr. After leaving in 2020, Clark reappeared a few months later as one of Anthropic’s seven co-founders. The “few months” in Barr’s account comes between OpenAI and Anthropic, not between journalism and an AI study break.
Clark’s own biography now identifies him as Anthropic’s co-founder and head of policy. It describes his earlier path in the same order: technical journalism at publications including Bloomberg Businessweek and The Register, then policy director at OpenAI, then Anthropic. The career change was unusual, but the evidence points to a reporter already steeped in AI joining a research lab, not stepping away to learn the subject from scratch.
