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← Back to all updatesPublished ·Anthropic• Minor
Anthropic announced Claude Opus 4.1 deprecation and scheduled Claude API retirement for August 5, 2026.
The read
Opus 4.1 API users have a dated migration window to move onto Claude Opus 4.8.
The frame
This sits in Anthropic’s model deprecations flow, so builders need to audit dependencies on claude-opus-4-1-20250805.
Primary source
Anthropic →Keep reading
See what Nova3 builds →Related updates
- Jun 12, 2026Anthropic publicly documented stop_details on refusal responses, with category and explanation fields for routing.
- Jun 12, 2026Claude Opus 4.8 defaults the effort parameter to high across all surfaces.
- Jun 12, 2026Claude Opus 4.8 lowers prompt caching’s minimum cacheable prompt length to 1,024 tokens versus Opus 4.7.
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