Automatic Model Selection

Intelligent Model Routing Overview

FastRouter’s intelligent model routing mode lets you delegate model selection to us. Instead of picking a specific model, just set:

"model": "fastrouter/auto"

How It Works

FastRouter will automatically select the most appropriate model based on:

• Complexity of the query

• Domain or topic of the request

• Cost-efficiency

This is the fastest way to get started — no manual tuning, no need to maintain model preference lists.

Example

curl --location 'https://go.fastrouter.ai/api/v1/chat/completions' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer API-KEY' \
--data '{
  "model": "fastrouter/auto",
  "messages": [
    {
      "role": "user",
      "content": "What is 2+2?"
    }
  ]
}'

FastRouter will analyze the input and select the best model from the available pool.