Choosing a provider

One serve process supports every provider. Choose based on the account you have, model access, and the capabilities your work needs.

Provider	Account	Upstream protocol	Model selection	Notable capabilities
Codex	ChatGPT Plus or Pro	OpenAI Responses over WebSocket or HTTP SSE	Named Codex catalog, -fast variants	Function tools, image input, hosted web search, reasoning summaries, optional native Responses route
Kimi	kimi.com with Kimi Code access	OpenAI-style chat completions	kimi-for-coding and aliases	Function tools, reasoning, image and video input
Grok	grok.com	Responses API	grok-composer-2.5-fast, grok-4.5	Function tools, reasoning, web search, X search, citations
Cursor Agent	Cursor account	HTTP/2 Connect stream	Cursor modes and cursor:<model-id> prefixes	Dynamic model catalog, effort variants, images, plan and ask modes, session continuation

Practical guidance

• Start with Codex when you have a ChatGPT subscription and want the most developed Claude Code translation path.
• Choose Kimi for the Kimi Code model and multimodal coding input.
• Choose Grok for Grok models and hosted web or X search.
• Choose Cursor Agent when you want Cursor’s model catalog and agent modes. It depends on an installed Cursor Agent bundle for protobuf schemas.

Shared behavior

All providers route by model ID, use proxy-owned credentials, refresh tokens when supported, stream responses, translate Claude Code tool definitions, and report failures through the same Anthropic-shaped API.

Account policy matters. Provider subscriptions, model access, regional availability, rate limits, and rules for unofficial clients can change. Review the terms for your account before using a provider through the proxy.

Use claude-code-proxy models for the current compact catalog and claude-code-proxy models --full for all advertised aliases. The Models and routing page explains aliases and discovery.