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

https://uniform-wiki.win/index.php/Can_I_Use_ChatGPT_and_Claude_Together_in_One_Conversation%3F

Suprmind offers a multi-AI chat platform combining GPT, Claude, Gemini, Grok, and Perplexity models in one place. At $19 a month with a free 7-day trial and no credit card needed, it’s a budget-friendly alternative to ChatGPT Plus at $20