Unverified50% confidenceFactExact time
Anthropic's Opus and Sonnet 5.5 have removed the no-reasoning option, while Haiku 5.5 retains it but performs poorly in that mode.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/9/2026
First Seen
Valid until: 1/7/2027
Sources
Related Entities
Related Claims
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