666 is an API conversion platform that aggregates access to various AI models. It offers a single API key to call connected models like Claude, GPT, Gemini, and Antigravity, with more models planned. Key features include smart routing across multiple upstream accounts with automatic failover for reliability, and pay-as-you-go billing with quota limits and team consumption visibility. The platform supports session persistence and provides one-click access without separate applications. Typical use cases involve developers or teams needing simplified, reliable access to multiple AI models through a unified interface.
