Stripe Bought the Routing Layer

Stripe has acquired OpenRouter, a company that provides developers with a single interface to access over 400 AI models. OpenRouter allows developers to switch between different AI models without modifying code, choosing based on cost, speed, or the model's availability. This abstraction enables developers to keep their applications vendor-agnostic, preventing any single model vendor from dominating their application.

Stripe's acquisition of OpenRouter signals a shift in the AI stack investment strategy, moving away from the winner-take-all approach focused on larger, more powerful models. By controlling the router layer, Stripe gains visibility into every inference decision, owning the switching mechanism and determining the default model used.

OpenRouter generates about 5% of the inference spend passing through it, highlighting the financial value of this layer. Stripe, known for its payments infrastructure, is now entering the infrastructure for AI inference, positioning itself as an intermediary rather than an AI company. This move could reshape the AI landscape by allowing developers to utilize the best models without being locked into a single vendor's roadmap or pricing.

The primary risk is that Stripe might favor certain models or providers, turning the router into a chokepoint rather than a lever. For now, the significance lies in Stripe's strategic bet: not on building AI models, but on becoming the intermediary layer that connects developers to the AI models they use.