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

https://suprmind.ai/hub/chatgpt/best-chatgpt-alternative/

Suprmind offers a multi-AI chat platform combining GPT, Claude, Gemini, Grok, and Perplexity models in one place. At $19, its Spark plan is cheaper than ChatGPT Plus at $20