Check out these two:
OpenAI has now blocked all access while using nostr:npub1mea2vwcu06qf7e4x00wd902vj54qnn2jacq76ldntrgfhtvhlpqqrvqane VPN. They’ve become the Coinbase of AI. For now, I’ll take my money to Anthropic, but longer term, self-hosted.
Discussion
LMSys Arena - use ‘Direct Chat’ tab and choose between models like GPT-4-Turbo, Claude 2.1 & Mixtral
HuggingFace Chat for open source LLMs, but limited access without sign up