Anthropic lists November 30, 2026 as the shutdown date. Listed model identifier.
claude-sonnet-5-5Releases, retirements, and the deadlines that affect your stack.
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Published announcements · Jan 2026 – Dec 2026
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Tracking since Jan 1, 2026 · recent announcements and deadlines from that date onward.
790 published notices · 1,424 observations preserved in the archive. Older, undated, or unsupported claims can be hidden.
Anthropic lists November 30, 2026 as the shutdown date. Listed model identifier.
claude-sonnet-5-5Anthropic announced this model on 2026-09-28.
Anthropic announced this model on 2026-09-22.
Anthropic announced this model on 2026-09-01.
Anthropic announced this model on 2026-09-01.
Anthropic documents a capability change: “We've launched Claude Opus 5 (claude-opus-5), a step-change improvement over Claude Opus 4.8.”
Anthropic announced this model on 2026-07-24.
Anthropic announced this model on 2026-06-30.
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