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Main Authors: Xu, Zhiyang, Chen, Jiuhai, Lin, Zhaojiang, Pan, Xichen, Huang, Lifu, Zhou, Tianyi, Khabsa, Madian, Wang, Qifan, Jin, Di, Yasunaga, Michihiro, Yu, Lili, Lin, Xi Victoria, Nie, Shaoliang
Format: Preprint
Published: 2025
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Online Access:https://arxiv.org/abs/2506.10395
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author Xu, Zhiyang
Chen, Jiuhai
Lin, Zhaojiang
Pan, Xichen
Huang, Lifu
Zhou, Tianyi
Khabsa, Madian
Wang, Qifan
Jin, Di
Yasunaga, Michihiro
Yu, Lili
Lin, Xi Victoria
Nie, Shaoliang
author_facet Xu, Zhiyang
Chen, Jiuhai
Lin, Zhaojiang
Pan, Xichen
Huang, Lifu
Zhou, Tianyi
Khabsa, Madian
Wang, Qifan
Jin, Di
Yasunaga, Michihiro
Yu, Lili
Lin, Xi Victoria
Nie, Shaoliang
contents Recent advances in large language models (LLMs) have enabled multimodal foundation models to tackle both image understanding and generation within a unified framework. Despite these gains, unified models often underperform compared to specialized models in either task. A key challenge in developing unified models lies in the inherent differences between the visual features needed for image understanding versus generation, as well as the distinct training processes required for each modality. In this work, we introduce Pisces, an auto-regressive multimodal foundation model that addresses this challenge through a novel decoupled visual encoding architecture and tailored training techniques optimized for multimodal generation. Combined with meticulous data curation, pretraining, and finetuning, Pisces achieves competitive performance in both image understanding and image generation. We evaluate Pisces on over 20 public benchmarks for image understanding, where it demonstrates strong performance across a wide range of tasks. Additionally, on GenEval, a widely adopted benchmark for image generation, Pisces exhibits robust generative capabilities. Our extensive analysis reveals the synergistic relationship between image understanding and generation, and the benefits of using separate visual encoders, advancing the field of unified multimodal models.
format Preprint
id arxiv_https___arxiv_org_abs_2506_10395
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Pisces: An Auto-regressive Foundation Model for Image Understanding and Generation
Xu, Zhiyang
Chen, Jiuhai
Lin, Zhaojiang
Pan, Xichen
Huang, Lifu
Zhou, Tianyi
Khabsa, Madian
Wang, Qifan
Jin, Di
Yasunaga, Michihiro
Yu, Lili
Lin, Xi Victoria
Nie, Shaoliang
Computer Vision and Pattern Recognition
Artificial Intelligence
Recent advances in large language models (LLMs) have enabled multimodal foundation models to tackle both image understanding and generation within a unified framework. Despite these gains, unified models often underperform compared to specialized models in either task. A key challenge in developing unified models lies in the inherent differences between the visual features needed for image understanding versus generation, as well as the distinct training processes required for each modality. In this work, we introduce Pisces, an auto-regressive multimodal foundation model that addresses this challenge through a novel decoupled visual encoding architecture and tailored training techniques optimized for multimodal generation. Combined with meticulous data curation, pretraining, and finetuning, Pisces achieves competitive performance in both image understanding and image generation. We evaluate Pisces on over 20 public benchmarks for image understanding, where it demonstrates strong performance across a wide range of tasks. Additionally, on GenEval, a widely adopted benchmark for image generation, Pisces exhibits robust generative capabilities. Our extensive analysis reveals the synergistic relationship between image understanding and generation, and the benefits of using separate visual encoders, advancing the field of unified multimodal models.
title Pisces: An Auto-regressive Foundation Model for Image Understanding and Generation
topic Computer Vision and Pattern Recognition
Artificial Intelligence
url https://arxiv.org/abs/2506.10395