Unverified50% confidenceFactExact time
In Opus 5.5 and Sonnet 5.5, text between tool calls is now returned as thinking blocks, which are empty under the default display, so UIs that stream progress annotations silently stop working, and display: updates must be used (beta header thinking-display-updates-2026-08-18).
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/15/2026
First Seen
Valid until: 1/13/2027
Sources
Related Entities
Related Claims
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