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title: README
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Welcome to the world of the Yi series models from [01.AI](https://www.01.ai/)!

You can explore the Yi series models listed below. Try now and enjoy! 😘 

Series | Intro |
---|---|
Yi-1.5 Models (2024/05)|An **upgraded** version of the Yi models (2023/11), with overall optimized performance in coding, math, reasoning, and logic. <br/> Yi-1.5 includes a collection of pre-trained and fine-tuned language models in 3 sizes: 6B, 9B, and 34B.
Yi-VL Models (2024/01) | A collection of pre-trained and fine-tuned multimodal models in 2 sizes: 6B and 34B.
Yi Models (2023/11) | A collection of pre-trained and fine-tuned language models in 2 sizes: 6B and 34B.