The time is UTC time - Greenwich UK time.
The local time is determined by your browser and calculated by web page code.
The usage page connection to returns this type of object in the 5-minute view, which only has UTC epoch time:
{
“object”: “list”,
“data”: ,
“ft_data”: ,
“dalle_api_data”: ,
“whisper_api_data”: [
{
“timestamp”: 1699099320,
“model_id”: “whisper-1”,
“num_seconds”: 1000,
“num_requests”: 1,
“user_id”: null,
“organization_id”: “org-123456789”
}
]
}
The usage API the account page employs requires authentication from the web browser session - OpenAI went out of their way to disable API key authentication.
If you “can’t count on them”…then you should be counting your own token usage in and out anyway.