[hx8]

I use Open Code as my harness. It's open source, bring your own API Key or OAuth token or self-hosted model. I've jumped from Opus 4.6 to Opus 4.7 to GPT 5.5 in the last 7 days. No big deal, intelligence is just a commodity in 2026.

The actual harness is great, very hackable, very extendable.

[NoveltyEngine]

Does Anthropic not actively ban people using oauth tokens in non-claude-code harnesses?

[hx8]

Yeah, for direct to Claude you need an API key. You can use other subscriptions like GitHub Copilot that expose Claude, but that path has been blocked.