Machine Learning

Lance: Unified Multimodal Modeling by Multi-Task Synergy

Fengyi Fu, Mengqi Huang

Featured May 22, 2026

AI-generated analysis — This is SciGrove's AI interpretation of the paper, not peer-reviewed content. Always refer to the original paper.

Simply

This new AI model, Lance, acts like a super-artist and smart detective for pictures and videos, learning to understand, create, and change them all at once by using special 'brain parts' for different jobs and a clever way to keep track of what's what.

In depth

The paper introduces Lance, a lightweight unified multimodal model that integrates image and video understanding, generation, and editing. It achieves this by combining a dual-stream mixture-of-experts architecture with a shared interleaved multimodal sequence, allowing specialized processing for understanding and generation while maintaining unified context. A novel modality-aware positional encoding further enhances cross-task alignment by distinguishing heterogeneous visual tokens.

Key Takeaways

1
Lance employs a dual-stream mixture-of-experts architecture, enabling specialized processing for understanding (semantic tokens) and generation (latent tokens) within a shared multimodal context.
2
A modality-aware rotary positional encoding (MaPE) is introduced to explicitly differentiate heterogeneous visual token groups, mitigating interference and improving cross-task alignment.
3
The model utilizes a staged multi-task training paradigm with adaptive data scheduling and capability-oriented objectives to progressively enhance both semantic comprehension and visual synthesis across diverse tasks.

Conceptual Flow

HIGH LEVEL

Methodology (The 'Logic')

The model uses different 'brain parts' for understanding and creating, but they all share a common 'story' of what's happening, making it good at many tasks.

Text

Pictures

Videos

Process and Share

Understand

Create

Change

Results (The 'Impact')

This new way of learning helps the model create much better pictures and videos than other models, even while being smaller and faster.

Old Models

Lance Model

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