Azure OpenAi GPT 4o returning "rate_limit_exceeded"

Question

Hello,

We have setup a pay as you go account, and we are using Azure openAI services for our internal use case. We have been using GPT-4o for the last 3 months with Assistants API and Azure AI search as well, it was working properly and most of our use case is on document Q&A.

Suddenly from last week, we were facing issues in Assistants API with GPT-40 alone and it is returning "rate_limit_exceeded", while the Azure AI search is still working good on the same use case.

Can someone suggest what could be the possible root cause for this issue? Are there any possibilities for the updates in GPT-4o models, how can we track those updates? We need to make sure this should not happen in future as well Because of this, we had to switch back to GPT-3.5-Turbo to make this work back.

Region - EastUS2

Error Log - "last_error": {

"code": "rate_limit_exceeded",

"message": "Rate limit is exceeded. Try again in 54 seconds."

},

"model": "gpt-4o",

Even after trying again sometime, the results are same and sometimes it prompts us to try again after 24 hours.

Thanks in Advance!