Anthropic Buys Stainless for Over $300 Million: The Quiet SDK Heist That Cut Off OpenAI, Google, and Cloudflare - May 19, 2026

Anthropic Buys Stainless for Over $300 Million: The Quiet SDK Heist That Cut Off OpenAI, Google, and Cloudflare - May 19, 2026 Anthropic has acquired four year old New York startup Stainless for more than three hundred million dollars, taking control of the AI powered SDK compiler that quietly ships the official client libraries for OpenAI, Google, Cloudflare, Runway, and Meta. Anthropic plans to wind down all hosted Stainless products and restrict the technology to its own teams, forcing rivals to scramble for alternatives like Speakeasy, LibLab, or in house tooling. Chris and Laura unpack why the boring layer of the developer stack just became the most strategic chokepoint in the AI ecosystem, and how Anthropic's larger pattern of infrastructure M and A is reshaping the developer platform wars. Hosted by Chris and Laura. The DX Today Podcast brings you daily deep dives into the most consequential stories in the AI ecosystem. Send us fan mail: https://dxtoday.com/contact #AI #Anthropic #Claude #DeveloperTools #AIInfrastructure