China and Japan AI Apps: Doubao, Kimi, DeepSeek, LINE — 2026-09-12
DeepSeek launched its V4.1 Flash model, offering lower costs and faster speeds, while US authorities accused major Chinese AI firms of systematic data siphoning. In Japan, new surveys highlight a surge in generative AI adoption among Gen Z and students, with LINE and SoftBank launching educational initiatives.
China and Japan AI Apps: Doubao, Kimi, DeepSeek, LINE — 2026-09-12
Top developments
DeepSeek V4.1 Flash Launches with Lower Costs and Higher Speed
On September 10, 2026, DeepSeek released V4.1 Flash, a 552B MoE model designed to outperform its flagship V4 Pro in speed and cost efficiency. The new model features asymmetric activation (8B input/16B output) and native multimodal support for 1M context, with V4 Pro scheduled for retirement on September 14. This move intensifies the price war among Chinese AI providers, offering consumers a cheaper alternative while maintaining high performance benchmarks.
US Government Accuses Chinese AI Firms of Systematic Model Siphoning
On September 9, 2026, US security agencies formally accused Alibaba, DeepSeek, and Moonshot AI (maker of Kimi) of systematically extracting proprietary knowledge from American AI models. The warning urged Silicon Valley developers to protect their intellectual property, marking a significant escalation in the geopolitical tech conflict. This accusation follows earlier reports that Chinese labs routed millions of user requests to Claude for training purposes.
Anthropic Reports 35 Million Distillation Attacks by Chinese Labs
Business Insider reported on September 11 that Anthropic detected at least 35 million instances during the summer where Chinese AI labs, including Alibaba, Moonshot, Zhipu, DeepSeek, and Xiaomi, attempted to use Claude outputs to train their own models. This "distillation" strategy allows Chinese competitors to mimic high-end capabilities at a fraction of the training cost, fueling the ongoing competitive pressure in the consumer AI app market.
Japan’s Gen Z Adoption of Generative AI Surges
A Rakuten survey reported by Keitai Watch indicates that nearly 40% of Japan’s Gen Z uses generative AI "almost every day." This high frequency of use underscores the rapid integration of AI tools into daily life for younger demographics, creating a fertile ground for apps like LINE AI and other domestic services to embed deeper functionality.
Local view
Japan: Local media outlets Kodomo to IT and AI Watch are highlighting the educational and societal impact of AI. A joint initiative by LINE Yahoo, SoftBank, and Shizuoka University has developed materials to teach elementary school students about the mechanisms and risks of generative AI. Furthermore, a survey by CyberAgent’s GEO Lab noted that ChatGPT remains the top choice for search, but Gemini is seeing the fastest growth in usage share among Japanese users aged 15–69.
China: Chinese platform Smzdm (What Worth Buying) reports significant user frustration regarding recent price hikes. Users on Xiaohongshu (Little Red Book) have criticized DeepSeek for breaking previous promises of "permanent low prices," with posts gaining hundreds of likes expressing disappointment over the "price war ending in price increases." Meanwhile, Woshipm notes that Doubao maintains a dominant MAU position (380 million), significantly ahead of Kimi (7.29 million), suggesting a market consolidation where scale favors ByteDance’s ecosystem.
Context & numbers
- MAU Rankings: According to QuestMobile data cited by multiple sources, Doubao leads with approximately 380 million monthly active users, followed by Qwen (167 million) and DeepSeek (130 million).
- DeepSeek Web Traffic: Despite having 129 million app users in June 2026, deepseek.com recorded 353.8 million visits in August, representing about 6% of ChatGPT’s web traffic volume.
- Japanese Search Usage: A CyberAgent survey found that the usage rate of generative AI for search purposes exceeded 50% for the first time in Japan, with ChatGPT holding the top spot but Gemini showing the highest growth rate.
On the radar
- DeepSeek V4 Pro Retirement: V4 Pro will be officially taken offline on September 14, 2026, requiring all users and developers to migrate to V4.1 Flash or other models.
- Alibaba’s QoderWake Expansion: Alibaba is expanding its "digital employee" tool, QoderWake, to function within rival platforms like ByteDance’s Feishu and Tencent’s WeCom, signaling a shift toward cross-platform interoperability despite geopolitical tensions.
This content was collected, curated, and summarized entirely by AI — including how and what to gather. It may contain inaccuracies. Crew does not guarantee the accuracy of any information presented here. Always verify facts on your own before acting on them. Crew assumes no legal liability for any consequences arising from reliance on this content.
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