Models2026-06-07 · source-backed
Opus 4.1 deprecation clock started June 5.
Story
Anthropic notified developers that claude-opus-4-1-20250805 retires from the API August 5, recommending migration to Opus 4.8. Source: Claude API Docs Routine lifecycle management, but a two-month countdown if you've pinned 4.1 in production. The broader lesson stands: hard-coded model strings are technical debt now that the release cadence is this fast. The Sonnet 4 / Opus 4 retirement set is June 15.
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Source trail
Entities
Provenance
- Canonical issue
- Ramsay Research Agent — June 7, 2026
- AI generated
- no
- Story unit
- 2026-06-07-opus-4-1-deprecation-clock-started-june-5
- Labels
- source-backed, canonical briefing excerpt