Model and API retirements

grok-4-1-fast-non-reasoning retirement date and replacement

Microsoft Foundry · Model · retires May 19, 2027 (in 7 months)Unverified

Vendor page

Dates

Checked Oct 24, 2026 on Microsoft's page
RetiresMay 19, 2027 (in 7 months)
ReplacementNone named
Model makerxAI
NoticeRetirement date; xAI
Sourcelearn.microsoft.com/en-us/azure/foundry/openai/concepts/model-retirement-schedule

Changes

AnnouncedUnverifiedOct 22Retires May 19, 2027. Retirement date; xAIMicrosoftSource

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