OpenAI Prompt Engineering Guide vs Llama 2

OpenAI Prompt Engineering Guide

Official OpenAI guide to writing effective prompts for GPT models

OpenAI's Prompt Engineering Guide is official documentation covering best practices and strategies for getting reliable, high-quality outputs from GPT models. It includes techniques like few-shot examples, chain-of-thought prompting, system message design, and instruction clarity. The guide is essential reading for developers and power users building applications on the OpenAI API who want to improve model behavior systematically.

Llama 2

Meta's open-source LLM fine-tuned for chat and research

Llama 2 is Meta's second-generation open-source large language model, available in 7B, 13B, and 70B parameter sizes, with both pretrained and fine-tuned chat variants. Unlike the original LLaMA, Llama 2 is released for both research and commercial use under a permissive license. The chat-optimized versions use RLHF alignment and are competitive with many proprietary models on reasoning and dialogue benchmarks.