Anthropic Acquires SDK Toolmaker Stainless, Leaving OpenAI and Others to Maintain SDKs

断供OpenAI！Anthropic买下全球1/4开发者都在用的工具商

Anthropic has completed its acquisition of Stainless, an SDK generation company used by OpenAI, Anthropic, Meta, Cloudflare, and other infrastructure vendors; Stainless says prior SDK ownership remains with customers, but it will shut down hosted products including SDK generator and stop providing ongoing support.

Why it matters: HKR-H/K/R all pass: the deal targets API SDK generation, names OpenAI/Meta/Cloudflare as customers, and says hosted products will shut down. Anthropic bump applies, but this is not a model or core capability release, so it fits 78–84.