Llama 2: Open Foundation and Fine-Tuned Chat Models LLaMA: Open and Efficient Foundation Language Models 摘要 1 Introduction 前言 Llama 2 训练流程 补充解释 PPO: 补充解释拒绝采样: 市面上的主流模型: 2 预训练 2.3 预训练模型的评估 Grouped-query Attention (GQA):只为每组的代表查询计算注意力权重,从...
we combined the two sequentially, applying PPO on top of the resulted Rejection Sampling checkpoint before sampling again.(在 RLHF v4 之前,一直在使用 Reject Sampling finetuning的方法,之后是先试用 Reject Sampling,然后再使用 PPO)
[4] Ainslie, Joshua, et al. "GQA: Training Generalized Multi-Query Transformer Models from Multi-Head Checkpoints." arXiv preprint arXiv:2305.13245 (2023). [5] “Introducing Llama2: The next generation of our open source large language model”, Meta, https://ai.meta.com/llama/. [6] G...
[4] Ainslie, Joshua, et al. "GQA: Training Generalized Multi-Query Transformer Models from Multi-Head Checkpoints." arXiv preprint arXiv:2305.13245 (2023). [5] “Introducing Llama2: The next generation of our open source large language model”, Meta, https://ai.meta.com/llama/. [6] G...
Llama 2: Open Foundation and Fine-Tuned Chat Models 1.简介 继2023年2月开源Llama之后,2023年7月Meta又开源了模型参数从70 亿到 700 亿不等的Llama 2,并同时开源了针对对话场景优化的LLaMA2-CHAT。LLama2 论文描述了微调和提高LLM安全性的方法以及在模型开发过程中的一些的观察。 论文摘要翻译:在这项工作中...
介绍LLAMA 2,一个基于开源基金会的自然语言处理模型,通过精细调整的Chat模型进行微调,以及其训练数据和上下文长度的增加。
且Meta还尝试使用了论文「Scaling Instruction-Finetuned Language Models」中介绍的指令微调方法,由此产生的模型LLaMA-I,在MMLU(Massive Multitask Language Understanding,大型多任务语言理解)上要优于Google的指令微调模型Flan-PaLM-cont(62B) 1.2 代码级解读:LLaMA的模型架构——RMSNorm/SwiGLU/RoPE/Transformer ...
在 Pretraining 评估阶段，LLAMA 语言模型在对比中表现出色，但在代码问题上与闭源商用模型如 PaLM-2、GPT-3.5、GPT-4 还存在差距，且仅支持英文。SFT（Sequence to Sequence Fine-tuning）阶段则是使用了与 OpenAI 相似但有细微差别的方法，通过 RLHF（Reward Learning from Human Feedback）优化模型...
Llama 2 is a family of generative text models that are optimized for assistant-like chat use cases or can be adapted for a variety of natural language generation tasks. Code Llama models are fine-tuned for programming tasks. Credit: Mariem_Ekatherina / Shutterstock Llama 2 is a family of...
Llama 2 is a family of generative text models that are optimized for assistant-like chat use cases or can be adapted for a variety of natural language generation tasks. Code Llama models are fine-tuned for programming tasks. Credit: Mariem_Ekatherina / Shutterstock Llama 2 is a family of...