Unverified50% confidenceFactExact time
Opus 5.5 fixes the previous issue where reasoning tiers written at the top of the system prompt would break the cache when switching reasoning levels, and it is now possible to freely switch reasoning levels mid-session without breaking the cache.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/25/2026
First Seen
Valid until: 12/24/2026
Sources
Related Entities
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