Claude Router

Claude Model Router

A Claude Code Mod that chooses a model and effort for each main-conversation turn, advised by a prompt classifier: Jev; Cloudflare's Clef, Clef Flash or Clef Omni; OpenAI; or a local Ollama model.

The Mod changes only the model and effort in Claude Code's turn hook. Claude Code sends the request, streams the reply, runs tools, and reports usage. The router does not proxy model traffic or start a local server; an Ollama classifier calls an Ollama server that you run. Subagents get one model each when they start, chosen the same way: every agent whose definition names no model, says model: inherit, or sets modelRouting: auto. Their steps are never re-routed. See Subagent routing.

Providers

Use the provider that already works with Claude Code. Select its router profile, not a new endpoint:

Create ~/.claude/deepseek-router.json containing {} to use DeepSeek defaults.
With CLAUDE_CONFIG_DIR, put the file in that directory instead.

OpenRouter, Ollama, other local servers and other compatible hosted providers use custom -router.json files.
They have no built-in model defaults. A selected file must exist and validate, or the router leaves Claude Code's model unchanged.

See Providers for default routes and activities, custom profiles, and the --settings flag alternative.
Execution provider selection is separate from classifier selection. Observed usage stays visible even when a provider's cache behavior makes savings comparisons unavailable.

Supported classifiers

The active classifier is asked at the start of each logical turn, for the tier and for the turn's activity, and again in the background every 4 requests while the turn runs (policy.reviewEveryRequests). Pick one on the pane's Classifier tab or in the selected router file; only the active…