My numbers are inflated due to a bug in ccusage for forked Codex context. I've filed a PR to fix this: https://github.com/jackcpku/ccusage/pull/1. My actual usage in the past week is closer to $4k.

@ohong are you aware of this?

Actually might have been a false alarm...Codex no longer thinks there's a bug. But would welcome more eyes on it.

Thx for report; looking into it 👀