[China's AI Large Model Weekly Call Volume Leads for 21 Consecutive Weeks: DeepSeek V4.1-Flash Tops the Chart with a 219% Week-on-Week Growth] According to DeepTech TechFlow, on September 21, based on the latest data estimates from OpenRouter, the global weekly call volume for AI large models reached 129 trillion tokens last week (September 14 to September 20), a week-on-week increase of 1.57%. Among the listed AI large models, China's AI large models achieved a weekly call volume of 67.46 trillion tokens, a week-on-week growth of 10.28%. In the same period, the weekly call volume for U.S. AI large models was 14.21 trillion tokens, a week-on-week decline of 34.7%. China's large model weekly call volume has surpassed that of the U.S. for 21 consecutive weeks, firmly holding the global top spot. Last week, four out of the top five global models by call volume were Chinese AI large models. Among them, DeepSeek V4.1-Flash rose to first place with a weekly call volume of 15.8 trillion tokens, marking a week-on-week growth of 219%. (Jin10)