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2 articles First covered May 19, 2026, latest Jun 23, 2026
Stainless developer-tools branding, the SDK-generation startup Anthropic acquired.
AI·

Anthropic bought Stainless, the SDK factory OpenAI and Meta also ran on

Anthropic acquired Stainless for a reported $300M and is winding down the hosted SDK generator that OpenAI, Meta, Google, and Cloudflare relied on.

Anthropic announcement card with node shapes on coral background.
AI·

Anthropic bought Stainless, the startup that builds every official SDK for OpenAI and Google.

Anthropic announced May 18 it acquired SDK generator Stainless, reportedly for over $300M. The same toolchain still powers OpenAI's, Google's, and Cloudflare's official clients.