Xiaomi-Lens-0 Technical Report

Xiaomi‑Lens‑0 is a 4B multimodal large language model built on Qwen3.5 that predicts region masks directly from its visual representations, eliminating the need for a separate segmentation encoder. By combining vision‑encoder patch features with visual latents and mask‑token states, the model interleaves reasoning with region‑specific latents, enabling grounded chain‑of‑thought reasoning. Across all RefCOCO, RefCOCO+, and RefCOCOg splits, Xiaomi‑Lens‑0 outperforms Qwen3.5 by an average of 5.6 points in referring comprehension and achieves the highest segmentation cIoU among compared models, while also surpassing Qwen3.5 on all perception benchmarks.

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• llms
• computer-vision
• multimodal
• benchmarks