Unverified50% confidenceFactExact time
METR's "50% time horizon" metric is defined as: the time humans need to complete software tasks that AI completes successfully with 50% probability.
1
Sources
50%
Confidence
Long-term
Relevance
10/13/2026
First Seen
Sources
Related Entities
Related Claims
Unverified在50步以上的复杂用户旅程E2E测试中，AI驱动方式总耗时可能是传统脚本的10倍以上66% similarUnverifiedIn the 2-to-30-minute interval, increases in human completion time barely change a task's AI difficulty, and tasks in this interval are similar in difficulty for AI.66% similarUnverifiedMain thread tasks exceeding 50ms (Long Tasks) will cause UI stuttering66% similarVerifiedThe response time tolerance for code completion in AI programming tools is typically within 200–500 milliseconds.66% similarUnverifiedBrown observed that each time AI crosses a mathematical benchmark threshold, the human time required for the tasks it can handle increases by approximately 10x (GSM8K ~5 seconds, MATH ~1 minute, olympiad qualification level ~10 minutes).64% similar
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