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Anthropic put a retirement notice on November 30, 2026, reading "claude-sonnet-4-5-<hash> | claude-sonnet-5-5".

AnthropicDEPRECATIONADDEDWED SEP 30, 20:13

The line, as the page carries it

+November 30, 2026: "claude-sonnet-4-5-<hash> | claude-sonnet-5-5"

The record

DOCUMENThttps://platform.claude.com/docs/en/about-claude/model-deprecations
SOURCEanthropic-deprecations
ROWNovember 30, 2026
OPERATIONadded
BEFORENothing was recorded because the row did not exist.
AFTERclaude-sonnet-4-5-<hash> | claude-sonnet-5-5
READ AT2026-09-30T20:13:57.315Z
SIGNALSdate, modelId

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