As an unemployed hobby coder, I find the cost of OpenAI API to be extremely high. For example: I estimate that the cost of a real world application like an autonomous personal assistant to be in the range of $90 - $120 (USD) per month. Of course some of this cost is caused by my lack of coding skill but not all of the cost.
Anyway, I monitor OpenAI API usage and cost very closely and I have found (though I have not created detailed logs) that my billed amount as shown on the OpenAI portal under ‘Usage’ changes for several days (2 - 3) after the API activity has occurred. I do not dispute the billed amount, neither the initial reported amount nor the amount that was / is ultimately billed. I do however, find the fluctuation a little annoying. I have seen the amount billed for a date change from $0.09 to $0.30 and I have seen changes in the other direction as well of the same approximate magnitude.
The amount of the fluctuation is not the issue - the existence of the fluctuation is the issue. Will this continue?
Based on past experience from a previous life this feels like ElasticSearch is being used to tally the billing tabulation. If so then this can definitely be fixed.