Anthropic in Talks to Buy Developer Tools Startup Used by OpenAI, Google

Anthropic in Talks to Buy Developer Tools Startup Used by OpenAI, Google

By Stephanie Palazzolo,Katie Roof
Publication Date: 2026-05-12 21:59:00

Anthropic is in advanced talks to acquire developer tools startup Stainless for at least $300 million, according to a person with knowledge of the deal. The four-year-old Stainless sells software to model makers including Anthropic, OpenAI and Google that helps developers, non-technical people …