Model and API retirements

claude-opus-5-5-fast (2) retirement date and replacement

Microsoft Foundry · Model · retires Jan 15, 2027 (in 83 days)Unverified

Vendor page

Dates

Checked Oct 24, 2026 on Microsoft's page
RetiresJan 15, 2027 (in 83 days)
ReplacementNone named
Model makerAnthropic
NoticeRetirement date; Anthropic
Sourcelearn.microsoft.com/en-us/azure/foundry/openai/concepts/model-retirement-schedule

Changes

AnnouncedUnverifiedOct 17Retires Jan 15, 2027. Retirement date; AnthropicMicrosoftSource

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