Suprmind offers a shared thread workspace combining Claude, GPT, Gemini, Grok,...

https://www.protopage.com/peter.collins#Bookmarks

Suprmind offers a shared thread workspace combining Claude, GPT, Gemini, Grok, and Perplexity, giving you access to multiple AI models in one place. Plans start at $20/month, with a 7-day free trial and no credit card required