Model Router
Definition
A model router chooses between AI models based on defined criteria.
A model router forwards requests to selected models or deployments based on defined strategies. Criteria can be cost, latency, availability and task characteristics. The selection does not automatically guarantee the technically best result.
Simply explained
Like a placement that passes on tasks to suitable specialists.
Why it matters in practice
Important for controlled processes with clear rights, audits and responsibilities.
Example from business
Possible example: Simple requests go to a cheaper model, complex ones to a more powerful one.
Limits and pitfalls
- Optimize only at cost and overlook quality, data protection or outages.
Origin & history
Today, LiteLLM documents various routing strategies, including cost, latency and utilization-related selection and fallbacks.
Use in mid-sized companies
- Possible application in SMEs: Simple requests go to a cheaper model, complex to a more powerful one.
Frequently asked questions
What does model router mean?
A model router chooses between AI models based on defined criteria.
What errors should be avoided?
Optimize only at cost and overlook quality, data protection or outages.
Sources
- Routing: Auswahlstrategien und Fallbacks · LiteLLM, Routing: Auswahlstrategien und Fallbacks
Sources checked on 09.10.2026. Editorial application examples are hypothetical; no evidence of real customer results.
Editorially reviewed on: