Llama 2 vs. ALBERT

We are excited to unveil the latest version of our open-source large language model, which includes model weights and initial code for the pretrained and fine-tuned Llama language models, ranging from 7 billion to 70 billion parameters. The Llama 2 pretrained models have been crafted using a remarkable 2 trillion tokens and boast double the context length compared to the first iteration, Llama 1. Additionally, the fine-tuned models have been refined through the insights gained from over 1 million human annotations. Llama 2 showcases outstanding performance compared to various other open-source language models across a wide array of external benchmarks, particularly excelling in reasoning, coding abilities, proficiency, and knowledge assessments. For its training, Llama 2 leveraged publicly available online data sources, while the fine-tuned variant, Llama-2-chat, integrates publicly accessible instruction datasets alongside the extensive human annotations mentioned earlier. Our project is backed by a robust coalition of global stakeholders who are passionate about our open approach to AI, including companies that have offered valuable early feedback and are eager to collaborate with us on Llama 2. The enthusiasm surrounding Llama 2 not only highlights its advancements but also marks a significant transformation in the collaborative development and application of AI technologies. This collective effort underscores the potential for innovation that can emerge when the community comes together to share resources and insights.

ALBERT is a groundbreaking Transformer model that employs self-supervised learning and has been pretrained on a vast array of English text. Its automated mechanisms remove the necessity for manual data labeling, allowing the model to generate both inputs and labels straight from raw text. The training of ALBERT revolves around two main objectives. The first is Masked Language Modeling (MLM), which randomly masks 15% of the words in a sentence, prompting the model to predict the missing words. This approach stands in contrast to RNNs and autoregressive models like GPT, as it allows for the capture of bidirectional representations in sentences. The second objective, Sentence Ordering Prediction (SOP), aims to ascertain the proper order of two adjacent segments of text during the pretraining process. By implementing these strategies, ALBERT significantly improves its comprehension of linguistic context and structure. This innovative architecture positions ALBERT as a strong contender in the realm of natural language processing, pushing the boundaries of what language models can achieve.