Shortly after I ran out of credits in 15 min, they tweeted that they increased usage limits to compensate for the higher token usage, so perhaps it is not as bad now.

Codex, this afternoon, I was able to use for like two hours on the $20 plan. Maybe limits will be tighter in the future. But with new data centers, new GPU generations, and research advances it might rather get cheaper.

Anyway, as you said, this is all pretty cheap. I'll go with the $100 Codex plan, since I now figured out how to nicely work on multiple changes in parallel via the Codex app with worktrees. I imagine the same is possible in Claude Code.