How is Anthropic different? You still cannot use a subscription in a custom harness in the same way Codex allows you to.
And, no, wrapping claude -p or any other “allowed” use wherein you don’t control the agent loop isn’t the same.
Subscription price and API price will converge.
It might be against ToS, but as a pragmatic matter, Anthropic doesn't seem to care if you use a custom harness with a subscription atm. I know a lot of people doing that now. Using Opus 5.5 as the orchestrator, and Luna max as the workhorse.
"indifferent" was the word they used. The sensible way to use Fable and Opus to do work at this point is claude code, but that's fine. I always have several instances running, along with codexes and pis. The question to ask is: can you stop a claude code and start a codex in its place without disrupting the team? Does my infrastructure support learning in a way that is stored by me, and not tied to a provider?