OpenAI-compatible API
Speaking the shape of OpenAI's chat endpoint, so that code written for one seller runs against another by changing a base URL.
a protocol · the vocabulary
/v1/chat/completionscompatible endpoint
It became the de facto standard because it was first and good enough. Nearly every gateway and most model vendors offer it, which is what makes the seller column on this site useful: for the same model at a lower price, the switch is usually a configuration change.