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smart-model-switching: Automatic Claude Model Selection That Cuts Your Bill in Half
Auto-route tasks to the cheapest Claude model that works correctly. Haiku for simple, Sonnet for medium, Opus for complex. No manual routing required.
Quick Access
Install command
$ mrt install ai

TL;DR
Auto-route tasks to the cheapest Claude model that works correctly. Three-tier progression: Haiku → Sonnet → Opus. Classify before responding.
10-Second Pitch
- **What it does:** Inspects each task, picks the right Claude model tier automatically
- **Key win:** Haiku handles ~60% of typical queries at ~1/20th Sonnet cost
- **Best for:** Any product using Claude API at volume
Setup
pip install claude-model-router
claude-router configure --models haiku sonnet opus
claude-router route "Summarize this document" # → Haiku
claude-router route "Write a full REST API spec" # → Sonnet
claude-router route "Design a fault-tolerant distributed system" # → Opus
Pros / Cons
| Pros | Cons |
|---|
| 40-60% cost reduction on typical AI workloads | Requires monitoring to tune classification |
| Automatic escalation for hard problems | Some complex tasks may need manual model pick |
|---|
| Drop-in for existing API integrations |
|---|
Verdict
The era of picking one Claude model and using it for everything is over. `smart-model-switching` handles the routing for you — install it and watch the API bill drop.