US AI lead over China shrinks sharply as DeepSeek closes in
US and China are now separated by a much smaller AI benchmark gap than before, with one estimate putting America’s edge at 3%. DeepSeek’s V4.1 Flash, launched in September, is tied to the lowest recorded margin in that measure. The smaller gap sits alongside Washington’s ongoing debate over whether to slow AI development.
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US developers and their customers are the immediate audience for this shift, because a smaller benchmark gap means the distance between leading US models and Chinese models is now narrower than before. That is visible in the market for AI systems tomorrow morning as competition is tighter and comparisons across models matter more.
What changes in practice is the size of the cushion that had separated the two sides in benchmark results. A 3% edge leaves the same race in place, but with less room than before for the leading side to rely on a wide numerical lead.
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