Stripe is in talks to acquire OpenRouter, a buzzy startup that helps developers choose between artificial-intelligence models, according to people familiar with the matter. A transaction could be announced soon, though the talks could still fall apart or another suitor could emerge, the people said. The exact price being discussed couldn’t be learned, but some of the people said the business could fetch about $10 billion in a sale. A number of other big tech companies had been considering potential deals for OpenRouter, the people familiar with the matter added. OpenRouter is part of an emerging crop of startups that…