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README.md

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+---
+license: llama2
+datasets:
+- togethercomputer/RedPajama-Data-1T
+- togethercomputer/RedPajama-Data-Instruct
+- EleutherAI/pile
+- togethercomputer/Long-Data-Collections
+language:
+- en
+library_name: transformers
+---
+
+# LLaMA-2-7B-32K
+
+## Model Description
+
+LLaMA-2-7B-32K is an open-source, long context language model developed by Together, fine-tuned from Meta's original Llama-2 7B model. 
+This model represents our efforts to contribute to the rapid progress of the open-source ecosystem for large language models. 
+The model has been extended to a context length of 32K with position interpolation, 
+allowing applications on multi-document QA, long text summarization, etc.
+
+## What's new?
+
+This model introduces several improvements and new features:
+
+1. **Extended Context:** The model has been trained to handle context lengths up to 32K, which is a significant improvement over the previous versions.
+
+2. **Pre-training and Instruction Tuning:** We have shared our data recipe, which consists of a mixture of pre-training and instruction tuning data.
+
+3. **Fine-tuning Examples:** We provide examples of how to fine-tune the model for specific applications, including book summarization and long context question and answering.
+
+4. **Software Support:** We have updated both the inference and training stack to allow efficient inference and fine-tuning for 32K context.
+
+## Model Architecture
+
+The model follows the architecture of Llama-2-7B and extends it to handle a longer context. It leverages the recently released FlashAttention-2 and a range of other optimizations to improve the speed and efficiency of inference and training.
+
+## Training and Fine-tuning
+
+The model has been trained using a mixture of pre-training and instruction tuning data. 
+- In the first training phase of continued pre-training, our data mixture contains 25% RedPajama Book, 25% RedPajama ArXiv (including abstracts), 25% other data from RedPajama, and 25% from the UL2 Oscar Data, which is a part of OIG (Open-Instruction-Generalist), asking the model to fill in missing chunks, or complete the text. 
+To enhance the long-context ability, we exclude data shorter than 2K word. The inclusion of UL2 Oscar Data is effective in compelling the model to read and utilize long-range context.
+- We then fine-tune the model to focus on its few shot capacity under long context, including 20% Natural Instructions (NI), 20% Public Pool of Prompts (P3), 20% the Pile. We decontaminated all data against HELM core scenarios . We teach the model to leverage the in-context examples by packing examples into one 32K-token sequence. To maintain the knowledge learned from the first piece of data, we incorporate 20% RedPajama-Data Book and 20% RedPajama-Data ArXiv.
+
+Next, we provide examples of how to fine-tune the model for specific applications. 
+The example datasets are placed in [togethercomputer/Long-Data-Collections](https://huggingface.co/datasets/togethercomputer/Long-Data-Collections)
+You can use the [OpenChatKit](https://github.com/togethercomputer/OpenChatKit) to fine-tune your own 32K model over LLaMA-2-7B-32K.
+Please refer to [OpenChatKit](https://github.com/togethercomputer/OpenChatKit) for step-by-step illustrations.
+
+1. Long Context QA.
+
+   We take as an example the multi-document question answering task from the paper “Lost in the Middle: How Language Models Use Long Contexts”. The input for the model consists of (i) a question that requires an answer and (ii) k documents, which are passages extracted from Wikipedia. Notably, only one of these documents contains the answer to the question, while the remaining k − 1 documents, termed as "distractor" documents, do not. To successfully perform this task, the model must identify and utilize the document containing the answer from its input context. 
+
+   With OCK, simply run the following command to fine-tune:
+   ```
+   bash training/finetune_llama-2-7b-32k-mqa.sh
+   ```
+
+2. Summarization.
+
+   Another example is BookSum, a unique dataset designed to address the challenges of long-form narrative summarization. This dataset features source documents from the literature domain, including novels, plays, and stories, and offers human-written, highly abstractive summaries. We here focus on chapter-level data.  BookSum poses a unique set of challenges, necessitating that the model comprehensively read through each chapter.
+
+   With OCK, simply run the following command to fine-tune:
+   ```
+   bash training/finetune_llama-2-7b-32k-booksum.sh
+   ```
+
+
+## Inference
+
+You can use the [Together API](https://together.ai/blog/api-announcement) to try out LLaMA-2-7B-32K for inference. 
+The updated inference stack allows for efficient inference.
+
+To run the model locally, we strongly recommend to install Flash Attention V2, which is necessary to obtain the best performance:
+```
+# Please update the path of `CUDA_HOME`
+export CUDA_HOME=/usr/local/cuda-11.8
+pip install transformers==4.31.0
+pip install sentencepiece
+pip install ninja
+pip install flash-attn --no-build-isolation
+pip install git+https://github.com/HazyResearch/flash-attention.git#subdirectory=csrc/rotary
+```
+
+You can use this model directly from the Hugging Face Model Hub or fine-tune it on your own data using the OpenChatKit.
+
+```python
+from transformers import AutoTokenizer, AutoModelForCausalLM
+
+tokenizer = AutoTokenizer.from_pretrained("togethercomputer/LLaMA-2-7B-32K")
+model = AutoModelForCausalLM.from_pretrained("togethercomputer/LLaMA-2-7B-32K", trust_remote_code=True, torch_dtype=torch.float16)
+
+input_context = "Your text here"
+input_ids = tokenizer.encode(input_context, return_tensors="pt")
+output = model.generate(input_ids, max_length=128, temperature=0.7)
+output_text = tokenizer.decode(output[0], skip_special_tokens=True)
+print(output_text)
+```
+
+Alternatively, you can set `trust_remote_code=False` if you prefer not to use flash attention.
+
+
+## Limitations and Bias
+
+As with all language models, LLaMA-2-7B-32K may generate incorrect or biased content. It's important to keep this in mind when using the model.
+
+## Community
+
+Join us on [Together Discord](https://discord.gg/6ZVDU8tTD4)

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