DeepSeek launches V4.1 Flash, sending rival AI stocks tumbling

Chinese artificial intelligence startup DeepSeek on Thursday launched its V4.1 Flash model, a slimmed-down system the company says is designed for greater capability, faster inference, and higher throughput, according to Reuters. The release comes alongside steep price cuts that sent shares of rival AI companies tumbling in Hong Kong and reignited concerns about a deepening price war among Chinese AI developers.reuters

A New Front in the AI Price War

DeepSeek implemented revised pricing for the Flash series effective September 10, further reducing costs during off-peak hours while maintaining a peak-valley pricing mechanism. The V4.1 Flash, which DeepSeek described as the smallest model in its new architecture family, has comprehensively surpassed its predecessor V4 Pro across performance, cost, speed, and task completion time, according to company statements.x+3

The model features native multimodal support and a new architecture, with weights published on Hugging Face. Bloomberg reported that the model charges as little as a fraction of a cent per million tokens, undercutting competitors from Anthropic to Z.AI. Shares of MiniMax Group and Z.AI fell sharply in Hong Kong trading, with MiniMax dropping 6.73% and Zhipu declining 7.88% by midday. Alibaba ↘ 2.52% also slid more than 2%.news.futunn+3

The release came as DeepSeek is preparing for an initial public offering on Shanghai's tech-focused STAR Market, Reuters reported.reuters

US-China AI Tensions as Backdrop

The launch arrives amid escalating US-China friction over AI. On September 8, the NSA, FBI, and CISA issued a joint advisory accusing six Chinese AI companies — DeepSeek, Moonshot AI, Alibaba, MiniMax, StepFun, and Z.AI — of systematically stealing capabilities from American AI models through "industrial-scale knowledge distillation campaigns". The advisory said the operations targeted firms including OpenAI, Anthropic, Google Alphabet Inc. ↘ 0.38%, and xAI, and occurred "likely with Chinese government awareness" since late 2024.aljazeera+2

China hit back on September 9, with the Commerce Ministry dismissing the accusations as "groundless" and warning of "resolute countermeasures" if the US takes action against Chinese companies. Foreign Ministry spokeswoman Mao Ning called China's AI development "the result of high-level technological self-reliance" and urged the US to "refrain from making unfounded accusations". Beijing also signaled willingness to hold AI talks with Washington despite the dispute.straitstimes+2

Market Implications

The V4.1 Flash release deepens a pattern that has rattled investors in Chinese AI stocks throughout 2026. DeepSeek's aggressive pricing strategy has repeatedly pressured margins across the sector, with Jefferies recently cutting Zhipu Cloud's price-to-sales multiple from 50x to 30x. The model's launch — combined with the diplomatic standoff over AI distillation — sets the stage for what could be a turbulent period for the industry as both nations jockey for supremacy in artificial intelligence.news.futunn