Codex Black Edition supports many providers from one panel, so you are not locked into a single vendor:
- Anthropic Claude (Opus 4.8, Sonnet, Haiku)
- OpenAI (GPT-4o)
- Grok / xAI
- Google Gemini
- Azure OpenAI
- Local Ollama models
You can connect with an API key or, where supported, a browser login. Pick a provider and model from the dropdowns and start chatting.