Suprmind offers a smart multi-AI chat platform combining GPT, Claude, Gemini,...

https://blogfreely.net/samuel-wang09/first-principles-mode-is-it-useful-or-just-a-gimmick

Suprmind offers a smart multi-AI chat platform combining GPT, Claude, Gemini, Grok, and Perplexity models in one place. It costs $19 with a 7-day no-credit-card trial, slightly cheaper than ChatGPT Plus at $20