Apparently it does work with Claude Max: https://opencode.ai/docs/providers/#anthropic

I don't see a similar option for ChatGPT Pro. Here's a closed issue: https://github.com/sst/opencode/issues/704

There's a plugin that evidently supports ChatGPT Pro with Opencode: https://github.com/sst/opencode/issues/1686#issuecomment-349...

Yes, I use it with a regular Claude Pro subscription. It also supports using GitHub Copilot subscriptions as a backend.