gpt-4o: model retirement on December 9, 2026
Microsoft documents a model retirement affecting gpt-4o on December 9, 2026. The source lists gpt-5.6-sol as a replacement identifier.
- Provider
- Microsoft
- Surface
- Azure AI Foundry
- Change type
- model retirement
- Shutdown
- Announced
- Not specified
- Last verified
What breaks
Code or configuration containing gpt-4o is in scope for this Microsoft model retirement on December 9, 2026.
- Microsoft's official documentation identifies gpt-4o as affected by this model retirement.
Affected identifiers and fields
Search your code, environment variables, gateway configuration, and stored request templates for these exact values.
gpt-4o
gpt-4o
Migration target
The official source lists gpt-5.6-sol as a replacement identifier. Test the migration against current provider documentation before production.
gpt-5.6-sol
What to do
Search repositories and deployment configuration for gpt-4o. The official source lists gpt-5.6-sol as a replacement identifier. Test the migration against current provider documentation before production.
Official source receipts
These provider pages support the dates, identifiers, symptoms, and migration direction recorded above.
Microsoft · Official documentation