OpenRouter
OpenRouter is the practical default for developers who want to try or mix many models without opening an account with every lab, and who value automatic fallback when a provider goes down. High-volume teams already on direct contracts with one or two labs will mostly be paying the platform fee for convenience they do not need.
Pros
- 500+ models behind one OpenAI-compatible API
- Automatic fallback across providers and routing by price or latency
- Data-policy routing to keep prompts away from providers you do not trust
- Free tier with 25+ free models for experimenting
Cons
- Platform fee of 5.5 to 8% on top of model prices
- Free tier is limited to 50 requests per day
- Adds another party between your app and the model provider