Office AI tasks can draw from your Codex allowance

Word, Excel/Sheets and PowerPoint AI tasks on the same account can leave less allowance for Codex, depending on your plan and feature availability. Included usage is used before purchased credits.

Typical examples are 5–20 credits per Excel/Sheets message and 10–50 per PowerPoint message. Actual use varies by model and task; check your balance in ChatGPT’s Settings → Usage.