Observed 30 September 2026
Anthropic's deprecations page added a new entry listing claude-sonnet-5-5 as active, with no retirement date set and a stated commitment not to retire it sooner than September 28, 2027.
routinesummary written by a model — check it against the diff below
No binding language changed. Likely wording, structure or navigation.
+1 · be65ad4 → 031c64f · 031c64fe67d4 · live page
anthropic/model-deprecations.txt30 Sept 2026
50 unchanged lines claude-opus-4-5-20251101 Active N/A Not sooner than November 24, 2026 claude-opus-4-1-20250805 Retired June 5, 2026 August 5, 2026 claude-opus-4-20250514 Retired April 14, 2026 June 15, 2026 claude-sonnet-5-5 Active N/A Not sooner than September 28, 2027 claude-sonnet-5 Active N/A Not sooner than June 30, 2027 claude-sonnet-4-6 Active N/A Not sooner than February 17, 2027 claude-sonnet-4-5-20250929 Active N/A Not sooner than September 29, 2026 68 unchanged lines
Underlined words mark what moved within a rewritten line. Nothing here is interpreted — this is the difference between two captures, and the conclusion is yours.