Xiaomi Open-Sources MiMo-V2.5 AI Models Under MIT License

aiai-modeling 6 posts · 4 accounts

Xiaomi has open-sourced its MiMo-V2.5 model family under the MIT License, allowing commercial deployment, continued training and fine-tuning without additional authorization. The release includes MiMo-V2.5-Pro, which Xiaomi positioned for complex agent and coding tasks, and MiMo-V2.5, which it described as a native omni-modal model with agent capabilities. Both models support a 1 million-token context window and are available in base and instruct versions.

MiMo-V2.5-Pro has 1.02 trillion total parameters with 42 billion active parameters, while MiMo-V2.5 has 310 billion total parameters with 15 billion active parameters. Xiaomi said the Pro model ranks first among open-source models on GDPVal-AA and ClawEval, the broader MiMo-V2.5 series has support in SGLang and vLLM, and MiMo-V2.5 was trained on about 48 trillion tokens using FP8 mixed precision.

From the sources (6 posts)

@teortaxestex

…It wasn't an intern's joke MiMo 2.5 (not Pro): > Trained on a total of ~48T tokens using FP8 mixed precision. The context window supports up to 1M tokens. We've got another 1M class, and the largest disclosed pretrain. Congrats Xiaomi.

@lmsysorg

RT @XiaomiMiMo: SGLang and vLLM support for the MiMo-V2.5 series is here. 🙌 Huge thanks to SGLang project from @lmsysorg and @vllm_project…

@teortaxestex

RT @teortaxesTex: This is a big F U to DeepSeek and frankly other labs that work with fancier architectures. For the next generation Xiaomi…

@theahmadosman

New Opensource SoTA contender enters the arena Xiaomi MiMo-V2.5 Pro - 1.02T Total Params / 42B Active Params - Base and Instruct versions Xiaomi MiMo-V2.5 - 310B Total Params / 15B Active Params - Base and Instruct versions MIT License

@jeremyphoward

RT @XiaomiMiMo: Xiaomi MiMo-V2.5 is now officially open-sourced！ MIT License, supporting commercial deployment, continued training, and fin…

@teortaxestex

RT @_LuoFuli: Just dropped two open-source models: MiMo-V2.5-Pro (Code Agent, 1T total) and MiMo-V2.5 (Multimodal Agent, 310B total). Oh a…

Market impact

72 big

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Why it matters: A frontier-class open-weight model (1T-param, 1M context, MIT license, top open-source on GDPVal-AA/ClawEval) is a DeepSeek-style event that threatens closed-lab margins and the AI-capex return thesis, repricing the largest index weights.

At publish time: Headline facts alone flag it: open-source under permissive MIT license, 1.02T total params, 1M-token context, and "ranks first among open-source models" on named evals — a frontier-capable open-weight release, not a routine feature launch.

model confidence: medium

What happened next

1–2 weeks later

no follow-up

No relevant follow-up on Xiaomi MiMo-V2.5; corpus items (Crypto.com UAE license, HY World 2.0 open-source) are unrelated. No DeepSeek-style mega-cap repricing evidence.

based on follow-up coverage

Follow-up coverage

May 11

Crypto.com Dubai Government Crypto Payments Settle in Dirhams Under UAE License

matched on: license, under
May 18

HY World 2.0 Fully Open-Sources Inference Code and All Models

matched on: models, open-sources

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