Anthropic
claude-sonnet-4-5-20250929
Yes. claude-sonnet-4-5-20250929 is deprecated and shuts down on November 30, 2026, in 25 days.
On Amazon Bedrock it appears as anthropic.claude-sonnet-4-5-20250929-v1:0, on Google Vertex AI as claude-sonnet-4-5@20250929. Those platforms set their own retirement dates: check their pages.
Recommended replacement: claude-sonnet-5-5
Source: Anthropic deprecation page, announced September 30, 2026.
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