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README.md
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---
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license: apache-2.0
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---
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<div align="center">
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<picture>
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<img src="https://raw.githubusercontent.com/01-ai/Yi/main/assets/img/Yi_logo_icon_light.svg" width="150px">
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</picture>
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</div>
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<p align="center">
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<a href="https://github.com/01-ai">🐙 GitHub</a> •
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<a href="https://discord.gg/hYUwWddeAu">👾 Discord</a> •
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<a href="https://twitter.com/01ai_yi">🐤 Twitter</a> •
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<a href="https://github.com/01-ai/Yi-1.5/issues/2">💬 WeChat</a>
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<br/>
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<a href="https://arxiv.org/abs/2403.04652">📝 Paper</a> •
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<a href="https://github.com/01-ai/Yi/tree/main?tab=readme-ov-file#faq">🙌 FAQ</a> •
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<a href="https://github.com/01-ai/Yi/tree/main?tab=readme-ov-file#learning-hub">📗 Learning Hub</a>
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</p>
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# Intro
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Yi-1.5 is an upgraded version of Yi. It is continuously pre-trained on Yi with a high-quality corpus of 500B tokens and fine-tuned on 3M diverse fine-tuning samples.
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Compared with Yi, Yi-1.5 delivers stronger performance in coding, math, reasoning, and instruction-following capability, while still maintaining excellent capabilities in language understanding, commonsense reasoning, and reading comprehension.
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<div align="center">
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Model | Context Length | Pre-trained Tokens
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| :------------: | :------------: | :------------: |
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| Yi-1.5 | 4K | 3.6T
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</div>
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# Models
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- Chat models
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<div align="center">
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| Name | Download |
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| --------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| Yi-1.5-34B-Chat | • [🤗 Hugging Face](https://huggingface.co/collections/01-ai/yi-15-2024-05-663f3ecab5f815a3eaca7ca8) • [🤖 ModelScope](https://www.modelscope.cn/organization/01ai) |
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| Yi-1.5-9B-Chat | • [🤗 Hugging Face](https://huggingface.co/collections/01-ai/yi-15-2024-05-663f3ecab5f815a3eaca7ca8) • [🤖 ModelScope](https://www.modelscope.cn/organization/01ai) |
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| Yi-1.5-6B-Chat | • [🤗 Hugging Face](https://huggingface.co/collections/01-ai/yi-15-2024-05-663f3ecab5f815a3eaca7ca8) • [🤖 ModelScope](https://www.modelscope.cn/organization/01ai) |
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</div>
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- Base models
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<div align="center">
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| Name | Download |
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| ---------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| Yi-1.5-34B | • [🤗 Hugging Face](https://huggingface.co/collections/01-ai/yi-15-2024-05-663f3ecab5f815a3eaca7ca8) • [🤖 ModelScope](https://www.modelscope.cn/organization/01ai) |
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| Yi-1.5-9B | • [🤗 Hugging Face](https://huggingface.co/collections/01-ai/yi-15-2024-05-663f3ecab5f815a3eaca7ca8) • [🤖 ModelScope](https://www.modelscope.cn/organization/01ai) |
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| Yi-1.5-6B | • [🤗 Hugging Face](https://huggingface.co/collections/01-ai/yi-15-2024-05-663f3ecab5f815a3eaca7ca8) • [🤖 ModelScope](https://www.modelscope.cn/organization/01ai) |
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</div>
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# Benchmarks
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- Chat models
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Yi-1.5-34B-Chat is on par with or excels beyond larger models in most benchmarks.
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Yi-1.5-9B-Chat is the top performer among similarly sized open-source models.
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- Base models
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Yi-1.5-34B is on par with or excels beyond larger models in some benchmarks.
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Yi-1.5-9B is the top performer among similarly sized open-source models.
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# Quick Start
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For getting up and running with Yi-1.5 models quickly, see [README](https://github.com/01-ai/Yi-1.5).
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