Suprmind lets you use GPT, Claude, Gemini, Grok, and Perplexity together in one...

https://www.bust-bookmark.win/suprmind-lets-you-chat-with-multiple-ai-models-like-gpt-claude-gemini-grok

Suprmind lets you use GPT, Claude, Gemini, Grok, and Perplexity together in one chat, making it easier to compare answers and keep track of disagreements