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

https://oscar-wiki.win/index.php/Does_Suprmind_Have_Projects_That_Remember_Context_Across_Conversations%3F

Suprmind offers a multi-AI chat platform combining GPT, Claude, and Gemini models in one place. It costs $19 a month, undercutting ChatGPT Plus's $20 price