S1-Omni: Unified AI Model for Scientific Reasoning and Generation

Jiahao Zhao, Junyi Liu, Lifeng Xu, Nan Xu, Qingli Wang, Qingxiao Li, Tianle Chen, Xiaoyu Wu, Yawen Zheng, Zikai Wang, Guanming Liu, Hequn Zhou, Jingyi Wang, Jingyuan Shu, Keqi Wang, Li He, Songyang Diao, Wenhui Xu, Xinyu Ren, Yaqin Fan, Yujin Zhou, Zhanao Yao· July 20, 2026 View original

Summary

S1-Omni is a new unified multimodal reasoning model designed for scientific understanding, prediction, and generation, consolidating fragmented AI capabilities across various scientific domains. It achieves this by mapping diverse scientific data into a shared representation, incorporating scientific laws, and performing task-specific decoding, outperforming leading LLMs and specialized models on many benchmarks.

The field of AI for Science (AI4S) has seen significant progress through specialized models and tool-augmented language models, but these capabilities often remain fragmented, hindering comprehensive joint modeling of diverse scientific data, laws, and expert knowledge. S1-Omni addresses this by introducing a unified multimodal reasoning model for scientific understanding, prediction, and generation. S1-Omni's architecture is built on three core components: a unified representation for scientific data, natural-world knowledge alignment, and task-specific decoding. It maps various scientific objects—such as CIF, SMILES, protein sequences, spectra, and images—alongside natural language instructions into a shared representation space. The model integrates scientific laws and expert knowledge during its training on the S1-Omni-Corpus, which covers 200 scientific tasks and millions of reasoning samples. This unified approach enables S1-Omni to support a broad range of applications, including property prediction, spectrum-to-molecular generation, protein structure prediction, and scientific image generation and editing. Evaluated on over 60 scientific benchmarks, S1-Omni outperforms GPT-5.5 and Gemini-3.1-Pro on most tasks and matches or surpasses many domain-specific models, marking a significant step towards unified scientific AI.

Why it matters

For professionals in scientific research, drug discovery, materials science, and engineering, S1-Omni represents a potential paradigm shift, offering a single AI model capable of accelerating discovery, prediction, and generation across multiple scientific disciplines.

How to implement this in your domain

  1. 1Explore the capabilities of unified scientific AI models like S1-Omni for accelerating research and development in your domain.
  2. 2Identify specific scientific workflows (e.g., drug discovery, materials design) where multimodal AI could integrate diverse data types.
  3. 3Collaborate with AI researchers to adapt or fine-tune unified models for proprietary scientific datasets and specific research questions.
  4. 4Invest in training scientific personnel on how to leverage advanced AI tools for understanding, prediction, and generation tasks.

Who benefits

PharmaceuticalsBiotechnologyMaterials ScienceChemical EngineeringAcademia

Key takeaways

  • S1-Omni is a unified multimodal AI model for scientific understanding, prediction, and generation.
  • It integrates diverse scientific data types and expert knowledge into a shared representation.
  • The model supports a wide range of scientific applications, from property prediction to image generation.
  • S1-Omni outperforms leading LLMs and specialized models on many scientific benchmarks.

Original post by Jiahao Zhao, Junyi Liu, Lifeng Xu, Nan Xu, Qingli Wang, Qingxiao Li, Tianle Chen, Xiaoyu Wu, Yawen Zheng, Zikai Wang, Guanming Liu, Hequn Zhou, Jingyi Wang, Jingyuan Shu, Keqi Wang, Li He, Songyang Diao, Wenhui Xu, Xinyu Ren, Yaqin Fan, Yujin Zhou, Zhanao Yao

"arXiv:2607.15686v1 Announce Type: new Abstract: We present S1-Omni, a unified multimodal reasoning model for scientific understanding, prediction, and generation. AI for Science (AI4S) has advanced significantly through domain-specific models, tool-augmented LLMs, and scientific…"

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Originally posted by Jiahao Zhao, Junyi Liu, Lifeng Xu, Nan Xu, Qingli Wang, Qingxiao Li, Tianle Chen, Xiaoyu Wu, Yawen Zheng, Zikai Wang, Guanming Liu, Hequn Zhou, Jingyi Wang, Jingyuan Shu, Keqi Wang, Li He, Songyang Diao, Wenhui Xu, Xinyu Ren, Yaqin Fan, Yujin Zhou, Zhanao Yao on X · view source

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