Llama 2: Open Foundation and Fine‑Tuned Chat Models – Overview, Training, and RLHF Details
This article provides a comprehensive English overview of Meta's Llama 2 family, describing the model sizes, pre‑training data, architectural improvements, supervised fine‑tuning, reinforcement learning with human feedback, safety evaluations, reward‑model training, and iterative optimization techniques used to produce the high‑performing Llama 2‑Chat models.
