MiMo-V2-Pro

model
Xiaomi
Xiaomi's 1-trillion parameter MoE flagship (42B active) designed for agentic workloads with a 1-million-token context window. Before its official reveal, MiMo-V2-Pro gained worldwide attention as the anonymous "Hunter Alpha" model on OpenRouter, widely misattributed to DeepSeek V4.
WebsiteAnnouncement (VentureBeat)Announcement (Gizmochina)OpenRouter (Hunter Alpha)Artificial Analysis (article)Artificial Analysis

Model Details

Architecture MOE
Parameters 1T
Active params 42B
Context window 1,000,000
moefrontieragentic

Related

Notes

MiMo-V2-Pro first appeared anonymously as "Hunter Alpha" on OpenRouter on March 11, 2026, with no developer attribution. The model quickly topped leaderboards (ClawEval 61.5, approaching Claude Opus 4.6) and processed 1.27 million requests in its first week. It was widely speculated to be DeepSeek V4 — Reuters testing found it described itself as "a Chinese AI model primarily trained in Chinese" with a May 2025 data cutoff matching DeepSeek's. On March 18-19, Xiaomi's MiMo team lead Luo Fuli confirmed it was an "early internal test build" of MiMo-V2-Pro, designed to gather unbiased developer feedback. Xiaomi's stock surged 5.8% on the reveal. Coverage: Technology.org (https://www.technology.org/2026/03/19/whos-that-ai-the-mystery-model-everyone-blamed-on-deepseek-turned-out-to-be-xiaomi/), Taipei Times (https://www.taipeitimes.com/News/feat/archives/2026/03/19/2003854074), Abacus News (https://www.abacusnews.com/how-xiaomi-outsmarted-the-ai-world-with-hunter-alpha/), Business Today (https://www.businesstoday.in/technology/news/story/mystery-behind-hunter-alpha-ai-model-revealed-know-what-it-is-and-why-everyones-talking-about-it-521430-2026-03-19/).