How Intelligent Routing Works
One of RoutePlex's most powerful features is intelligent routing — the ability to automatically select the best AI model for each request. Here's how it works under the hood.
The Challenge
Not all AI models are created equal. GPT-4o excels at complex reasoning. Claude handles long context windows well. Gemini offers cost-effective performance for simpler tasks. The "best" model depends entirely on what you're asking it to do.
Choosing the right model manually for every request is tedious, error-prone, and hard to optimize at scale.
How RoutePlex Solves This
When you send a request with model: "routeplex-ai", our routing engine evaluates multiple signals to select the optimal model:
1. Request Analysis
We analyze the incoming request to understand its characteristics:
- Token count — How long is the prompt?
- Complexity signals — Does it contain code, math, or multi-step reasoning?
- Content type — Is it creative writing, data extraction, or conversation?
2. Model Health Scoring
Every model in our pool has a real-time health score based on:
- Latency — Current response times
- Error rates — Recent failure rates
- Availability — Whether the provider is currently operational
3. Cost Optimization
Based on your account settings and the request characteristics, we factor in:
- Your cost preferences — Balance between quality and cost
- Token pricing — Real-time pricing across providers
- Daily budget caps — Stay within your configured limits
4. Smart Selection
The routing engine combines these signals to select the best model. If that model fails, the request is automatically retried with the next best option — your application never sees the retry.
The Result
- Better quality — Requests are matched to models that handle them best
- Lower costs — Simple requests route to cost-effective models
- Higher reliability — Multi-model fallback means 99.9%+ effective uptime
- Zero effort — You write one integration and get the benefits of every model
Direct Mode
Of course, if you know exactly which model you want, you can always specify it directly:
model: "openai/gpt-4o"
model: "anthropic/claude-sonnet-4"
model: "google/gemini-2.5-flash"
Intelligent routing is the default. Direct mode is always available.
