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Hello Varun Jhaveri
Greetings! Thanks for raising this question in Q&A forum.
Based on your description, the most likely cause is that quota for the gpt-5.6-terra model is still allocated to an existing deployment, reserved capacity, or there is a delay in quota synchronization within Azure AI Foundry. Since other models such as luna are deploying correctly, this appears to be specific to the model quota rather than a general deployment issue.
- In Azure AI Foundry, review all active and recently deleted deployments for gpt-5.6-terra and confirm no capacity is still assigned to them.
- Check the model quota page and verify both the available quota and the quota assigned to existing deployments in the target region.
- Try deploying the model in a different supported region if quota is available there.
- If the portal shows no deployments consuming quota but the deployment still fails, open a Microsoft Support request and provide:
- Subscription ID
- Resource name
- Deployment region
- Screenshot of the quota page
- Full deployment error message
- Screenshot of the quota page
- Deployment region
- Resource name
- Subscription ID
If the quota usage is not visible in the portal, the next action is with Microsoft Support. They can review the backend quota allocation records and determine whether there is a stale quota assignment or synchronization issue affecting the model deployment.
If this answer helps you kindly accept the answer which will help others who have similar questions
Best Regards,
Jerald Felix.