These interfaces allow you to toggle between multiple underlying logic engines within a single workspace to optimize for cost, speed, or reasoning depth. Use these platforms to experiment with how different mathematical foundations handle your specific prompts without managing dozens of separate subscriptions. When selecting a utility, prioritize those that offer unified chat history and transparent performance metrics across all integrated providers.

Low-cost, OpenAI-compatible API for multiple AI models

One API for OpenAI, Claude, Gemini & more
One API for Chinese frontier AI models

One API. Every Frontier Model.