Update README.md

README.md

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 <b><font size="6">InternLM</font></b>
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-Welcome to the InternLM organization. InternLM is mainly developed by Shanghai AI Laboratory. We keep open-sourcing high quality LLMs as well as a full-stack toolchain for development and application.
+Welcome to the InternLM organization. Intern-series large models are developed by Shanghai AI Laboratory. We keep open-sourcing high quality LLMs/MLLMs as well as a full-stack toolchain for development and application.
 
 ## Models
 
+- [Intern-S1](https://github.com/InternLM/Intern-S1): a scientific multimodal large model with both strong general capabilities and the SOTA performance on various scientific tasks.
 - [InternLM](https://github.com/InternLM/InternLM): a series of multi-lingual foundation models and chat models.
 - [InternLM-Math](https://github.com/InternLM/InternLM-Math): state-of-the-art bilingual math reasoning LLMs.
 - [InternLM-XComposer](https://github.com/InternLM/InternLM-XComposer): a vision-language large model (VLLM) based on InternLM for advanced text-image comprehension and composition.