OpenAI-compatible API

A standardized interface that allows developers to swap AI backends by mirroring OpenAI’s RESTful request and response schemas.

OpenAI-compatible APIs function as a de facto industry standard, enabling seamless transitions between model providers like Together AI, Fireworks, or self-hosted vLLM instances. By adopting the /v1/chat/completions endpoint and standard JSON payloads (including model, messages, and temperature parameters), these APIs eliminate vendor lock-in. Developers can integrate diverse LLMs (such as Llama 3 or Mistral) into existing applications by simply updating the base_url and api_key in their client configuration. This compatibility ensures that tools like LangChain, LlamaIndex, and the official OpenAI SDK work out of the box with any compliant backend.

https://platform.openai.com/docs/api-reference/introduction