tommytang930/yi

A series of large language models trained from scratch by developers @01-ai

Introduction

The Yi series models are large language models trained from scratch by developers at 01.AI. The first public release contains two bilingual (English/Chinese) base models with the parameter sizes of 6B and 34B. Both of them are trained with 4K sequence length and can be extended to 32K during inference time.

News

• 🎯 2023/11/05: The base model of Yi-6B-200K and Yi-34B-200K with 200K context length.
• 🎯 2023/11/02: The base model of Yi-6B and Yi-34B.

Model Performance

Model	MMLU	CMMLU	C-Eval	GAOKAO	BBH	Common-sense Reasoning	Reading Comprehension	Math & Code
	5-shot	5-shot	5-shot	0-shot	3-shot@1	-	-	-
LLaMA2-34B	62.6	-	-	-	44.1	69.9	68.0	26.0
LLaMA2-70B	68.9	53.3	-	49.8	51.2	71.9	69.4	36.8
Baichuan2-13B	59.2	62.0	58.1	54.3	48.8	64.3	62.4	23.0
Qwen-14B	66.3	71.0	72.1	62.5	53.4	73.3	72.5	39.8
Skywork-13B	62.1	61.8	60.6	68.1	41.7	72.4	61.4	24.9
InternLM-20B	62.1	59.0	58.8	45.5	52.5	78.3	-	30.4
Aquila-34B	67.8	71.4	63.1	-	-	-	-	-
Falcon-180B	70.4	58.0	57.8	59.0	54.0	77.3	68.8	34.0
Yi-6B	63.2	75.5	72.0	72.2	42.8	72.3	68.7	19.8
Yi-6B-200K	64.0	75.3	73.5	73.9	42.0	72.0	69.1	19.0
Yi-34B	76.3	83.7	81.4	82.8	54.3	80.1	76.4	37.1
Yi-34B-200K	76.1	83.6	81.9	83.4	52.7	79.7	76.6	36.3

While benchmarking open-source models, we have observed a disparity between the results generated by our pipeline and those reported in public sources (e.g. OpenCompass). Upon conducting a more in-depth investigation of this difference, we have discovered that various models may employ different prompts, post-processing strategies, and sampling techniques, potentially resulting in significant variations in the outcomes. Our prompt and post-processing strategy remains consistent with the original benchmark, and greedy decoding is employed during evaluation without any post-processing for the generated content. For scores that were not reported by the original authors (including scores reported with different settings), we try to get results with our pipeline.

To evaluate the model's capability extensively, we adopted the methodology outlined in Llama2. Specifically, we included PIQA, SIQA, HellaSwag, WinoGrande, ARC, OBQA, and CSQA to assess common sense reasoning. SquAD, QuAC, and BoolQ were incorporated to evaluate reading comprehension. CSQA was exclusively tested using a 7-shot setup, while all other tests were conducted with a 0-shot configuration. Additionally, we introduced GSM8K (8-shot@1), MATH (4-shot@1), HumanEval (0-shot@1), and MBPP (3-shot@1) under the category "Math & Code". Due to technical constraints, we did not test Falcon-180 on QuAC and OBQA; the score is derived by averaging the scores on the remaining tasks. Since the scores for these two tasks are generally lower than the average, we believe that Falcon-180B's performance was not underestimated.

Usage

Feel free to create an issue if you encounter any problem when using the Yi series models.

1. Prepare development environment

The best approach to try the Yi series models is through Docker with GPUs. We provide the following docker images to help you get started.

Note that the latest tag always points to the latest code in the main branch. To test a stable version, please replace it with a specific tag.

If you prefer trying out with your local development environment. First, create a virtual environment and clone this repo. Then install the dependencies with pip install -r requirements.txt. For the best performance, we recommend you also install the latest version (>=2.3.3) of flash-attention.

2. Download the model (optional)

By default the model weights and tokenizer will be downloaded from HuggingFace automatically in the next step. You can also download them manually from the following places:

• ModelScope
• WiseModel (Search for Yi)
• Mirror site (remember to extract the content with tar)
  • Yi-6B.tar
  • Yi-6B-200K.tar
  • Yi-34B.tar
  • Yi-34B-200K.tar

3. Examples

3.1 Use the base model

python demo/text_generation.py

To reuse the downloaded models in the previous step, you can provide the extra --model argument:

python demo/text_generation.py  --model /path/to/model

Or if you'd like to get your hands dirty:

from transformers import AutoModelForCausalLM, AutoTokenizer

model = AutoModelForCausalLM.from_pretrained("01-ai/Yi-34B", device_map="auto", torch_dtype="auto", trust_remote_code=True)
tokenizer = AutoTokenizer.from_pretrained("01-ai/Yi-34B", trust_remote_code=True)
inputs = tokenizer("There's a place where time stands still. A place of breath taking wonder, but also", return_tensors="pt")
max_length = 256  

outputs = model.generate(
    inputs.input_ids.cuda(),
    max_length=max_length,
    eos_token_id=tokenizer.eos_token_id 
)
print(tokenizer.decode(outputs[0], skip_special_tokens=True))

Output

Prompt: There's a place where time stands still. A place of breath taking wonder, but also

Generation: There's a place where time stands still. A place of breath taking wonder, but also of great danger. A place where the very air you breathe could kill you. A place where the only way to survive is to be prepared. The place is called the Arctic. The Arctic is a vast, frozen wilderness. It is a place of extremes. The temperatures can drop to -40 degrees Celsius. The winds can reach speeds of 100 kilometers per hour. The sun can shine for 24 hours a day, or not at all for weeks on end. The Arctic is also a place of great beauty. The ice and snow are a pristine white. The sky is a deep blue. The sunsets are spectacular. But the Arctic is also a place of great danger. The ice can be treacherous. The winds can be deadly. The sun can be blinding. The Arctic is a place where the only way to survive is to be prepared. The Arctic is a place of extremes. The temperatures can drop to -40 degrees Celsius. The winds can reach speeds of 100 kilometers per hour. The sun can shine for 24 hours a day, or not at all for weeks on end. The Arctic is a place of great beauty. The ice and snow are a

For more advanced usage, please refer the doc.

3.2 Finetuning from the base model:

bash finetune/scripts/run_sft_Yi_6b.sh

Once finished, you can compare the finetuned model and the base model with the following command:

bash finetune/scripts/run_eval.sh

For more advanced usage like fine-tuning based on your custom data, please refer the doc.

Disclaimer

We use data compliance checking algorithms during the training process, to ensure the compliance of the trained model to the best of our ability. Due to complex data and the diversity of language model usage scenarios, we cannot guarantee that the model will generate correct, and reasonable output in all scenarios. Please be aware that there is still a risk of the model producing problematic outputs. We will not be responsible for any risks and issues resulting from misuse, misguidance, illegal usage, and related misinformation, as well as any associated data security concerns.

License

The source code in this repo is licensed under the Apache 2.0 license. The Yi series models are fully open for academic research and free commercial usage with permission via applications. All usage must adhere to the Model License Agreement 2.0. To apply for the official commercial license, please contact us ([email protected]).