Anthropic Buys Stainless to Cut Off OpenAI and Google SDK Access

Anthropic acquired Stainless, the startup that turns APIs into production SDKs.

Anthropic plans to shut down Stainless’s hosted service for other companies, while keeping existing outputs available.

The move gives Anthropic control over a key developer-tooling layer used across the AI ecosystem.

It could make it harder for rival AI labs, including OpenAI and Google, to maintain their own integrations.