From a tense split to dueling IPOs: A timeline of Anthropic and OpenAI's rivalry

OpenAI and Anthropic, led by Sam Altman and Dario Amodei respectively, have a history of rivalry dating back to their 2015 collaboration. Their feud intensified after Amodei left OpenAI in 2020, with both companies now preparing for IPOs. Public exchanges between their teams highlight the growing competition.