# Stainless Related Articles

Cutting Off OpenAI, Anthropic Acquires the Tool Provider Used by a Quarter of Global Developers

Anthropic has acquired Stainless, a developer tool company that automatically generated official SDKs (Software Development Kits) for AI giants including OpenAI, Anthropic, Meta, and Cloudflare. The deal, reportedly valued at around $300 million, marks a strategic shift for Anthropic as it builds its "AI agent" infrastructure. Stainless acted as a "translator," converting complex API specifications into ready-to-use code libraries for developers. Its tools indirectly reached about a quarter of professional software developers globally. Following the acquisition, Stainless will shut down its public products and its team will join Anthropic to focus on internal platform development, notably for the Claude Platform. Existing SDKs remain with their respective client companies but will no longer receive updates from Stainless. This move is part of Anthropic's broader 18-month strategy to assemble a complete "agent stack." The stack consists of the Claude model at its core, the newly acquired Stainless for standardized API interfaces, and the Model Context Protocol (MCP), an open standard for connecting agents to external tools and data. This contrasts with OpenAI's focus on model generations and consumer-scale compute. Anthropic believes an agent's ultimate utility depends on its ability to connect to external systems. By internalizing the SDK layer and promoting MCP as a connection standard, Anthropic aims to lock in long-term ecosystem advantages and create path dependency, moving beyond the transient lead provided by any single model generation.

marsbit05/21 11:33