# US-China AI Model Cycles Shrink to 44 Days as Autonomous R&D Accelerates > Source: > Published: 2026-09-21 09:00:00+00:00 US-China AI Model Cycles Shrink to 44 Days as Autonomous R&D Accelerates AI development in the US and China is accelerating at an unprecedented pace, with new models now being released every 44 days on average, a third of the previous development time. Dick Weisinger · September 21, 2026 · 2 min read · Source: nikkei_jp · Issue #103 East Asian Technology Intelligence Japan & China tech news — translated, contextualized, and delivered for Western readers. Free. Unsubscribe anytime. This story ran in Issue #103, alongside three other stories. AI & Machine Learning AI development in the US and China is accelerating at an unprecedented pace, with new models now being released every 44 days on average, a third of the previous development time. This rapid acceleration is largely driven by AI systems themselves taking on significant roles in R&D, leading to a dramatic increase in code generation and performance improvements. The self-evolution of AI is intensifying concerns about its potential to become uncontrollable. The speed of AI model development has significant implications for national security, economic competitiveness, and the global regulatory landscape, particularly in the ongoing technological rivalry between the US and China. The debate around AI ‘threat theory’ or ‘x-risk’ is prominent in Western discourse, focusing on the existential dangers of advanced AI.