Model Slot Mapping

Claude Code has a built-in /model command that switches between three model slots: haiku (fast), sonnet (balanced), and opus (powerful). By default, these map to Anthropic models, but Claudex lets you map each slot to any provider’s model.

Configuration

Add a [profiles.models] table to any profile:

[[profiles]]
name = "grok"
provider_type = "OpenAICompatible"
base_url = "https://api.x.ai/v1"
api_key = "xai-..."
default_model = "grok-3-beta"

[profiles.models]
haiku = "grok-3-mini-beta"
sonnet = "grok-3-beta"
opus = "grok-3-beta"

When you type /model sonnet inside Claude Code, Claudex resolves it to grok-3-beta. The /model opus command maps to grok-3-beta, and so on.

How It Works

When launching Claude Code, Claudex sets three environment variables:

Environment Variable	Description
`ANTHROPIC_DEFAULT_HAIKU_MODEL`	Model name for the haiku slot
`ANTHROPIC_DEFAULT_SONNET_MODEL`	Model name for the sonnet slot
`ANTHROPIC_DEFAULT_OPUS_MODEL`	Model name for the opus slot

Claude Code reads these variables to populate its /model switcher. If a slot is not configured in the profile, the profile’s default_model is used as the fallback.

Provider Model Mapping Examples

Grok (xAI)

[profiles.models]
haiku = "grok-3-mini-beta"
sonnet = "grok-3-beta"
opus = "grok-3-beta"

OpenAI

[profiles.models]
haiku = "gpt-4o-mini"
sonnet = "gpt-4o"
opus = "o1"

DeepSeek

[profiles.models]
haiku = "deepseek-chat"
sonnet = "deepseek-chat"
opus = "deepseek-reasoner"

Google Gemini

[profiles.models]
haiku = "gemini-2.0-flash"
sonnet = "gemini-2.5-pro"
opus = "gemini-2.5-pro"

ChatGPT Codex (Subscription)

[profiles.models]
haiku = "codex-mini-latest"
sonnet = "gpt-5.3-codex"
opus = "gpt-5.3-codex"

Claude (Subscription)

[profiles.models]
haiku = "claude-haiku-4-20250514"
sonnet = "claude-sonnet-4-20250514"
opus = "claude-opus-4-20250514"

Groq

[profiles.models]
haiku = "gemma2-9b-it"
sonnet = "llama-3.3-70b-versatile"
opus = "llama-3.3-70b-versatile"

Mistral

[profiles.models]
haiku = "mistral-small-latest"
sonnet = "mistral-large-latest"
opus = "mistral-large-latest"

Ollama (Local)

[profiles.models]
haiku = "qwen2.5:7b"
sonnet = "qwen2.5:32b"
opus = "qwen2.5:72b"

Default Behavior

If [profiles.models] is not specified, all three slots fall back to the profile’s default_model. This means /model haiku, /model sonnet, and /model opus all use the same model.

Environment Variable Override

You can override slots without modifying the config by setting environment variables directly:

ANTHROPIC_DEFAULT_HAIKU_MODEL=my-fast-model claudex run grok

Environment variables take precedence over profile configuration.