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---
license: apache-2.0
model-index:
- name: Yi-1.5-34B-Chat
  results:
  - task:
      type: text-generation
      name: Text Generation
    dataset:
      name: IFEval (0-Shot)
      type: HuggingFaceH4/ifeval
      args:
        num_few_shot: 0
    metrics:
    - type: inst_level_strict_acc and prompt_level_strict_acc
      value: 60.67
      name: strict accuracy
    source:
      url: https://huggingface.co/spaces/open-llm-leaderboard/open_llm_leaderboard?query=01-ai/Yi-1.5-34B-Chat
      name: Open LLM Leaderboard
  - task:
      type: text-generation
      name: Text Generation
    dataset:
      name: BBH (3-Shot)
      type: BBH
      args:
        num_few_shot: 3
    metrics:
    - type: acc_norm
      value: 44.26
      name: normalized accuracy
    source:
      url: https://huggingface.co/spaces/open-llm-leaderboard/open_llm_leaderboard?query=01-ai/Yi-1.5-34B-Chat
      name: Open LLM Leaderboard
  - task:
      type: text-generation
      name: Text Generation
    dataset:
      name: MATH Lvl 5 (4-Shot)
      type: hendrycks/competition_math
      args:
        num_few_shot: 4
    metrics:
    - type: exact_match
      value: 23.34
      name: exact match
    source:
      url: https://huggingface.co/spaces/open-llm-leaderboard/open_llm_leaderboard?query=01-ai/Yi-1.5-34B-Chat
      name: Open LLM Leaderboard
  - task:
      type: text-generation
      name: Text Generation
    dataset:
      name: GPQA (0-shot)
      type: Idavidrein/gpqa
      args:
        num_few_shot: 0
    metrics:
    - type: acc_norm
      value: 15.32
      name: acc_norm
    source:
      url: https://huggingface.co/spaces/open-llm-leaderboard/open_llm_leaderboard?query=01-ai/Yi-1.5-34B-Chat
      name: Open LLM Leaderboard
  - task:
      type: text-generation
      name: Text Generation
    dataset:
      name: MuSR (0-shot)
      type: TAUR-Lab/MuSR
      args:
        num_few_shot: 0
    metrics:
    - type: acc_norm
      value: 13.06
      name: acc_norm
    source:
      url: https://huggingface.co/spaces/open-llm-leaderboard/open_llm_leaderboard?query=01-ai/Yi-1.5-34B-Chat
      name: Open LLM Leaderboard
  - task:
      type: text-generation
      name: Text Generation
    dataset:
      name: MMLU-PRO (5-shot)
      type: TIGER-Lab/MMLU-Pro
      config: main
      split: test
      args:
        num_few_shot: 5
    metrics:
    - type: acc
      value: 39.12
      name: accuracy
    source:
      url: https://huggingface.co/spaces/open-llm-leaderboard/open_llm_leaderboard?query=01-ai/Yi-1.5-34B-Chat
      name: Open LLM Leaderboard
---
<div align="center">

<picture> 
  <img src="https://raw.githubusercontent.com/01-ai/Yi/main/assets/img/Yi_logo_icon_light.svg" width="150px">
</picture>

</div>

<p align="center">
  <a href="https://github.com/01-ai">πŸ™ GitHub</a> β€’
  <a href="https://discord.gg/hYUwWddeAu">πŸ‘Ύ Discord</a> β€’
  <a href="https://twitter.com/01ai_yi">🐀 Twitter</a> β€’
  <a href="https://github.com/01-ai/Yi-1.5/issues/2">πŸ’¬ WeChat</a> 
  <br/>
  <a href="https://arxiv.org/abs/2403.04652">πŸ“ Paper</a> β€’
  <a href="https://01-ai.github.io/">πŸ’ͺ Tech Blog</a> β€’
  <a href="https://github.com/01-ai/Yi/tree/main?tab=readme-ov-file#faq">πŸ™Œ FAQ</a> β€’
  <a href="https://github.com/01-ai/Yi/tree/main?tab=readme-ov-file#learning-hub">πŸ“— Learning Hub</a>
</p>

# Intro

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. 

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.

<div align="center">
  
Model | Context Length | Pre-trained Tokens
| :------------: | :------------: | :------------: |
| Yi-1.5 | 4K, 16K, 32K | 3.6T

</div>

# Models

- Chat models

  <div align="center">
  
  | Name            | Download                                                                                                                                                            |
  | --------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
  | Yi-1.5-34B-Chat | β€’ [πŸ€— Hugging Face](https://huggingface.co/collections/01-ai/yi-15-2024-05-663f3ecab5f815a3eaca7ca8) β€’ [πŸ€– ModelScope](https://www.modelscope.cn/organization/01ai) β€’ [🟣 wisemodel](https://wisemodel.cn/organization/01.AI)|
  | Yi-1.5-34B-Chat-16K  | β€’ [πŸ€— Hugging Face](https://huggingface.co/collections/01-ai/yi-15-2024-05-663f3ecab5f815a3eaca7ca8) β€’ [πŸ€– ModelScope](https://www.modelscope.cn/organization/01ai) β€’ [🟣 wisemodel](https://wisemodel.cn/organization/01.AI) |
  | Yi-1.5-9B-Chat  | β€’ [πŸ€— Hugging Face](https://huggingface.co/collections/01-ai/yi-15-2024-05-663f3ecab5f815a3eaca7ca8) β€’ [πŸ€– ModelScope](https://www.modelscope.cn/organization/01ai) β€’ [🟣 wisemodel](https://wisemodel.cn/organization/01.AI) |
  | Yi-1.5-9B-Chat-16K  | β€’ [πŸ€— Hugging Face](https://huggingface.co/collections/01-ai/yi-15-2024-05-663f3ecab5f815a3eaca7ca8) β€’ [πŸ€– ModelScope](https://www.modelscope.cn/organization/01ai) β€’ [🟣 wisemodel](https://wisemodel.cn/organization/01.AI) |
  | Yi-1.5-6B-Chat  | β€’ [πŸ€— Hugging Face](https://huggingface.co/collections/01-ai/yi-15-2024-05-663f3ecab5f815a3eaca7ca8) β€’ [πŸ€– ModelScope](https://www.modelscope.cn/organization/01ai) β€’ [🟣 wisemodel](https://wisemodel.cn/organization/01.AI) |
  
  </div>

- Base models

  <div align="center">
  
  | Name       | Download                                                                                                                                                            |
  | ---------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
  | Yi-1.5-34B | β€’ [πŸ€— Hugging Face](https://huggingface.co/collections/01-ai/yi-15-2024-05-663f3ecab5f815a3eaca7ca8) β€’ [πŸ€– ModelScope](https://www.modelscope.cn/organization/01ai) β€’ [🟣 wisemodel](https://wisemodel.cn/organization/01.AI) |
  | Yi-1.5-34B-32K | β€’ [πŸ€— Hugging Face](https://huggingface.co/collections/01-ai/yi-15-2024-05-663f3ecab5f815a3eaca7ca8) β€’ [πŸ€– ModelScope](https://www.modelscope.cn/organization/01ai) β€’ [🟣 wisemodel](https://wisemodel.cn/organization/01.AI) |
  | Yi-1.5-9B | β€’ [πŸ€— Hugging Face](https://huggingface.co/collections/01-ai/yi-15-2024-05-663f3ecab5f815a3eaca7ca8) β€’ [πŸ€– ModelScope](https://www.modelscope.cn/organization/01ai) β€’ [🟣 wisemodel](https://wisemodel.cn/organization/01.AI) |
  | Yi-1.5-9B-32K  | β€’ [πŸ€— Hugging Face](https://huggingface.co/collections/01-ai/yi-15-2024-05-663f3ecab5f815a3eaca7ca8) β€’ [πŸ€– ModelScope](https://www.modelscope.cn/organization/01ai) β€’ [🟣 wisemodel](https://wisemodel.cn/organization/01.AI) |
  | Yi-1.5-6B  | β€’ [πŸ€— Hugging Face](https://huggingface.co/collections/01-ai/yi-15-2024-05-663f3ecab5f815a3eaca7ca8) β€’ [πŸ€– ModelScope](https://www.modelscope.cn/organization/01ai) β€’ [🟣 wisemodel](https://wisemodel.cn/organization/01.AI) |
  
  </div>

# Benchmarks

- Chat models

  Yi-1.5-34B-Chat is on par with or excels beyond larger models in most benchmarks.

  ![image/png](https://cdn-uploads.huggingface.co/production/uploads/656d9adce8bf55919aca7c3f/KcsJ9Oc1VnEmfCDEJc5cd.png)

  Yi-1.5-9B-Chat is the top performer among similarly sized open-source models.

  ![image/png](https://cdn-uploads.huggingface.co/production/uploads/656d9adce8bf55919aca7c3f/xf6pLg5jqRCwjlh6m3t6_.png)

- Base models

  Yi-1.5-34B is on par with or excels beyond larger models in some benchmarks.

  ![image/png](https://cdn-uploads.huggingface.co/production/uploads/656d9adce8bf55919aca7c3f/BwU7QM-03dZvZzwdIE1xY.png)

  Yi-1.5-9B is the top performer among similarly sized open-source models.

  ![image/png](https://cdn-uploads.huggingface.co/production/uploads/656d9adce8bf55919aca7c3f/y-EYSYPT-3aWLJ0x8R94F.png)

# Quick Start

For getting up and running with Yi-1.5 models quickly, see [README](https://github.com/01-ai/Yi-1.5).


# [Open LLM Leaderboard Evaluation Results](https://huggingface.co/spaces/open-llm-leaderboard/open_llm_leaderboard)
Detailed results can be found [here](https://huggingface.co/datasets/open-llm-leaderboard/details_01-ai__Yi-1.5-34B-Chat)

|      Metric       |Value|
|-------------------|----:|
|Avg.               |32.63|
|IFEval (0-Shot)    |60.67|
|BBH (3-Shot)       |44.26|
|MATH Lvl 5 (4-Shot)|23.34|
|GPQA (0-shot)      |15.32|
|MuSR (0-shot)      |13.06|
|MMLU-PRO (5-shot)  |39.12|