LLM APIs & Model Routing
OpenRouter
One API key to call hundreds of LLMs from many providers, with routing and fallbacks
Pros
- Switch models without code changes
- Free models to prototype
Cons
- Extra layer between you and providers
- Platform fees on paid usage
LLM API
Where it ranks
- Best LLM API for adding AI to your app
Fit rank #1. One key for hundreds of models with fallbacks; free models to prototype.
Best for trying and switching models easily. Skip if you need direct provider contracts.