I also had this same issue with both GPT-4o and GPT-4.5, I had unexpected billing even though I was well under (~500k tokens) the 1m tokens for GPT-4o for the day.
I also had this same issue with both GPT-4o and GPT-4.5, I had unexpected billing even though I was well under (~500k tokens) the 1m tokens for GPT-4o for the day.