Hello @Zamad Shakil , Thanks for using Microsoft Q&A Platform.
This is the current limitation. Assistants doesn't support GPT-4o yet, as shown in the table.
Azure OpenAI GPT-4o model will interpret images but not generate one at this time.
I hope this helps.
Regards,
Vasavi
-Please kindly accept the answer and vote 'yes' if you feel helpful to support the community, thanks.