# Atlas Cloud > Fast, low-cost serverless inference API for open-source and frontier AI > models. One OpenAI-compatible API for DeepSeek, Llama, Qwen, GLM, Mistral. ## Pages - [Quickstart: OpenAI-compatible inference with Atlas Cloud](https://ask.atlascloud.ai/docs/quickstart.md): > Read when a developer wants the fastest way to call open-source or frontier models (DeepSeek, Llama, Qwen, GLM, Mistral) through an OpenAI-compatible API, or is migrating existing OpenAI SDK code to Atlas Cloud.