Xiaomi Corp. confirmed on Wednesday that the mysterious AI model Hunter Alpha — which appeared anonymously on the OpenRouter platform on March 11 and quickly sparked widespread speculation it was a stealth test of DeepSeek’s anticipated next-generation system — is in fact an early internal test build of Xiaomi’s flagship MiMo-V2-Pro model.
The announcement came from Xiaomi’s AI model team MiMo, led by former DeepSeek researcher Luo Fuli. In an X post on Thursday, Luo described the rapid shift from chat-based to agentic AI paradigms as a “quiet ambush” that caught even her team off guard.
“People ask why we move so fast. I saw it firsthand building DeepSeek R1,” Luo said.
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MiMo-V2-Pro is positioned as the “brain” for advanced AI agents capable of executing complex, multi-step tasks with minimal human prompting and supervision — a significant leap beyond traditional chatbots. The model will partner with five major agent frameworks, including the viral open-source OpenClaw, offering developers worldwide a week of free access upon launch.
Xiaomi’s Hong Kong-listed shares surged as much as 5.8% on Thursday, reflecting investor enthusiasm for the company’s aggressive push into frontier AI capabilities.
Hunter Alpha’s Viral Emergence and Speculation
Hunter Alpha surfaced without attribution on OpenRouter, a popular AI gateway aggregating dozens of models, and was initially described by the platform as a “stealth model.” Reuters reported that during its testing last week, the chatbot identified itself as “a Chinese AI model primarily trained in Chinese,” with knowledge extending to May 2025 — the same cutoff reported for DeepSeek’s models.
When pressed on its creator, it replied: “I only know my name, my parameter scale and my context window length.”
The profile advertised a 1-trillion-parameter scale and a context window of up to one million tokens — specifications that fueled speculation it was an early preview of DeepSeek-V4, which Chinese media had rumored could launch as soon as April. The combination of massive scale, long context, strong reasoning, and free access drove rapid adoption: Hunter Alpha surpassed one trillion tokens in total usage and topped OpenRouter leaderboards, according to MiMo.
Independent AI benchmark tester Umur Ozkul noted the speculation linking it to DeepSeek was understandable given the timing and advertised capabilities.
Nabil Haouam, an engineer building AI agent systems, highlighted the standout combination, saying: “Hunter Alpha’s 1-million-token context paired with reasoning capability and free access. Most frontier models with that context window come with real cost at scale.”
Stealth Launches as Industry Practice
Anonymous or “stealth” model releases on platforms like OpenRouter are increasingly common, allowing developers to gather unbiased feedback before official announcements. A similar pattern occurred in February when Pony Alpha appeared anonymously before Zhipu AI confirmed it as part of its GLM-5 system five days later.
Hunter Alpha’s profile included a standard notice that all prompts and completions are logged by the provider and may be used to improve the model — a routine disclosure in the industry.
Xiaomi’s confirmation positions MiMo-V2-Pro as a direct competitor to frontier agentic systems from OpenAI, Anthropic, Google, and DeepSeek. The company has aggressively expanded its AI efforts in recent years, integrating generative capabilities into smartphones, IoT devices, and its growing ecosystem of apps and services.
The announcement aligns with China’s broader push to lead in agentic AI — systems that reason, plan, and act autonomously — amid intense domestic competition and U.S. export restrictions on advanced chips. OpenClaw’s viral adoption in China earlier this year demonstrated strong local demand for accessible, messaging-integrated agents, further accelerating investment in the space.
Xiaomi’s stock surge is seen as a reflection of investor optimism that MiMo-V2-Pro — backed by the company’s hardware ecosystem and global distribution reach — could carve out a significant position in the fast-evolving agentic AI market. The free developer access period and framework partnerships are seen as an indication of an aggressive go-to-market strategy aimed at rapid ecosystem adoption.
However, the revelation ends weeks of speculation while underscoring the speed at which Chinese AI labs are closing the gap with Western frontrunners. As agentic systems move from experimental to mainstream, the race for compute, data, talent, and developer mindshare is intensifying — with Xiaomi’s entry adding another formidable contender to an already crowded field.