Analyst Says Anthropic Prepares Fable 5.2 Release

German AI analyst and newsletter creator Kim Isenberg posted that anyone who thought the GPT-6 Astra release was all there was to it is mistaken. He stated that Anthropic appears to be preparing to respond to OpenAI with a major release expected very soon, referred to as Fable 5.2 or whatever it ends up being called. Isenberg also noted that OpenAI's DevDay is just around the corner. The packet contains only this single quoted claim from his account.