Unable to access GPT-5.3-Codex and GPT-5.4 in Azure AI Foundry after submitting questionnaire twice

GPT-5.3-Codex and GPT-5.4 are limited access models and can't be deployed until the access request for the subscription is explicitly approved.

From the documentation:

• GPT-5.4 requires a separate registration: access must be requested via the gpt-5.4 limited access model application and granted before deployment is possible.
• For gpt-5.x models in general, if a model or version is not available in a region or subscription, the guidance is to verify model support in the Foundry portal and ensure the subscription has been granted access, as some models require registration.

Given the situation:

1. Model availability in East US 2
   • The Global Standard model availability table shows that in eastus2, both gpt-5.3-codex and gpt-5.4 are listed as available models (check marks in that region row), but availability in the catalog does not override gating. The subscription must still be approved for gated models.
2. Access requirements for GPT-5.4
   • GPT-5.4 is explicitly called out as requiring registration. The documented process is:
     • Submit the access request using the gpt-5.4 limited access model application at https://aka.ms/OAI/gpt54access.
     • Wait for Microsoft to review and grant access.
     • After approval, create a deployment for the model in the Foundry portal.
   • If the questionnaire has already been submitted twice and the status remains pending, it means the request has not yet been processed/approved; there is no self-service override in the portal.
3. Access requirements for GPT-5.3-Codex
   • GPT-5.3-Codex is a reasoning model. Reasoning models in the GPT-5 family are treated as gated models in Azure AI Foundry. The documentation notes that for GPT-5 models, some require registration and that when a model or version is not available, the subscription’s access must be checked.
   • The correct verification path is:
     • In the Foundry portal, open the model catalog for the NeoFlux project in eastus2.
     • Locate gpt-5.3-codex. If it shows a lock icon or cannot be deployed, the subscription is still gated and requires approval from Microsoft.
4. What can be done next
   • Confirm that the correct access request has been submitted for GPT-5.4 using the documented application link (gpt-5.4 limited access model application).
   • For both GPT-5.3-Codex and GPT-5.4, use the Foundry model catalog in the corvio-foundry-east-us-2 resource and NeoFlux project to verify that the models appear but are locked; this confirms that the issue is gating, not region support or quota.
   • If the portal still shows the models as locked and the access request remains pending, the only supported path is escalation through Microsoft’s access review process. The documentation does not provide a direct channel beyond:
     • Submitting the limited access application for GPT-5.4.
     • Ensuring the subscription meets eligibility criteria.
   • As an interim step, consider using non-gated GPT-5.x reasoning models that do not require access requests (for example, gpt-5.1, gpt-5.1-chat, gpt-5.1-codex, or gpt-5.1-codex-mini), which are listed as “Access is no longer restricted” or “No access request needed” and are available via the same model availability table.

Because access approval and gating decisions are handled internally by Microsoft and the documentation does not expose any API or portal control to force approval, any further action requires Microsoft’s internal review of the submitted access requests for the subscription.

References:

• Foundry Models sold directly by Azure (azure-openai)
• Computer Use in Azure OpenAI (classic)
• Codex with Azure OpenAI in Microsoft Foundry Models
• Azure OpenAI models and regions for Foundry Agent Service (classic)
• How to troubleshoot your deployments and monitors in Microsoft Foundry portal (classic)
• Azure OpenAI reasoning models
• Use vision-enabled chat models (ai-foundry-portal)
• Permission Denied Error in Apps Service - Microsoft Q&A
• Microsoft Foundry publish to Teams Bot service error - Microsoft Q&A
• modelgpt-5.1 - Microsoft Q&A
• https://learn.microsoft.com/en-us/answers/questions/ask/?wt.mc_id=pcs_inproduct_azportal_caseask&portal=azure&context=sso&source=azure-portal Unable to access this even after accesses - Microsoft Q&A
• Unable to Access or Connect to VM - Microsoft Q&A