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mux supports multiple AI providers. Configure provider API keys in Settings → Providers — see Providers for setup.

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First-class Models

mux ships with curated models kept up to date with the frontier. Use any custom model with /model <provider:model_id>.
ModelIDAliasesDefault
Opus 4.5anthropic:claude-opus-4-5opus✓
Sonnet 4.5anthropic:claude-sonnet-4-5sonnet
Haiku 4.5anthropic:claude-haiku-4-5haiku
GPT-5.2openai:gpt-5.2gpt
GPT-5.2 Proopenai:gpt-5.2-progpt-pro
GPT-5.1 Codexopenai:gpt-5.1-codexcodex
GPT-5.1 Codex Miniopenai:gpt-5.1-codex-minicodex-mini
GPT-5.1 Codex Maxopenai:gpt-5.1-codex-maxcodex-max
Gemini 3 Pro Previewgoogle:gemini-3-pro-previewgemini-3, gemini-3-pro
Gemini 3 Flash Previewgoogle:gemini-3-flash-previewgemini-3-flash
Grok 4 1 Fastxai:grok-4-1-fastgrok, grok-4, grok-4.1, grok-4-1
Grok Code Fast 1xai:grok-code-fast-1grok-code

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Model Selection

Keyboard shortcuts:
  • Cycle models
    • macOS: Cmd+/
    • Windows/Linux: Ctrl+/
To choose a specific model, click the model pill in the chat footer. Alternatively, use the Command Palette (Cmd+Shift+P / Ctrl+Shift+P):
  1. Type “model”
  2. Select “Change Model”
  3. Choose from available models
Models are specified in the format: provider:model-name

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Next Steps

Configure Providers

Set up API keys for Anthropic, OpenAI, Google, and other providers.