Co-Chair, AI Index Steering Committee
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Active co-chair guiding AI Index methodology
For most of the past decade, the United States held a comfortable lead in artificial intelligence. That margin is now effectively gone. Stanford University's ninth annual AI Index, released April 13, found that Chinese AI models have traded places with American ones at the top of performance rankings multiple times since early 2025, with the current gap down to 2.7 percentage points — a spread that used to be measured in double digits.
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