Unverified50% confidenceFactExact time
In Claude Code, when a user specifies an unsupported Effort level (such as X High) for an older model, the system silently downgrades to the highest level that model supports (usually High) and continues execution, without error or notice.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/17/2026
First Seen
Valid until: 1/15/2027
Sources
Related Entities
Related Claims
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