They list Claude, OpenAI GPT, Mistral, Gemini and Llama: https://help.kagi.com/kagi/ai/assistant.html#llms-available-...

It's a fair assesment, unless you're nitpicking about "all" in there.

I would be surprised if at any point in time there are more than 5 LLM providers who are widely considered premium (close to SOTA in my interpretation).