How Anthropic Could Take an OpenAI Supplier Off The Table
$300M+. That's what Anthropic is spending to cut OpenAI off from a critical developer tool.

Why it matters
Anthropic's potential acquisition of Stainless removes a shared supplier that OpenAI depends on, forcing competitors to either build in-house or find alternatives—a strategic move that weaponizes developer experience as competitive moat in a market where model capabilities are converging.
The key facts
7 to knowAnthropic in talks to acquire Stainless for at least $300 million
Stainless makes SDKs that simplify API access for AI models
Current Stainless customers: OpenAI, Google, Anthropic
OpenAI previously built its own SDKs but engineers cited maintenance difficulty
OpenAI customer testimonial cited 'lacking developer experience' with in-house tools
Deal threatens to force OpenAI and Google to rebuild or source alternative SDK suppliers
SDK differentiation increasingly critical as model capability gaps narrow
Go to the source
The Informationtheinformation.com
Publisher excerpt: Is a big AI model maker about to take out a supplier to its archrival? That seems possible if a deal we reported on late Tuesday reaches the finish line. Anthropic is in talks to buy developer tools startup Stainless for at least $300 million, according to Stephanie and Katie. The New York startup…