https://ppq.ai/ from nostr:npub16g4umvwj2pduqc8kt2rv6heq2vhvtulyrsr2a20d4suldwnkl4hquekv4h is pretty good imo.
Discussion
That's probably what I am gonna use for what I need. Though two months ago when I gave it a go, found their Claude dumber than the one I'd been using with subscription. Same model though. And it still ended up being quite expensive not as advertised.