Llama 2 vs ChatGPT

The next generation of our open source large language model

This release includes model weights and starting code for pretrained and fine-tuned Llama language models — ranging from 7B to 70B parameters.

Llama 2 was trained on 40% more data than Llama 1, and has double the context length.

Training Llama-2-chat: Llama 2 is pretrained using publicly available online data. An initial version of Llama-2-chat is then created through the use of supervised fine-tuning. Next, Llama-2-chat is iteratively refined using Reinforcement Learning from Human Feedback (RLHF), which includes rejection sampling and proximal policy optimization (PPO).

Meta and Microsoft have partnered to unveil Llama 2, the open-source successor to their widely-utilized large language model, Llama. This groundbreaking model is designed to enhance the capabilities of AI, offering it free for both research and commercial use. Recognized as the preferred partner, Microsoft is integrating Llama 2 into its Azure AI model catalog, providing developers with robust cloud-native tools and optimization for Windows platforms.

Llama 2 is also accessible through other major providers like AWS and Hugging Face. Dedicated to responsible AI innovation, Meta and Microsoft emphasize transparency and community-oriented development with resources like red-teaming exercises, a transparency schematic, and a responsible use guide. Collaborative initiatives such as the Open Innovation AI Research Community and the Llama Impact Challenge are also part of the rollout, aiming to spur responsible applications of Llama 2 across various sectors.

ChatGPT is OpenAI's conversational large language model you reach through chatgpt.com on the web, iOS, and Android. You type or speak a prompt, and it answers in plain language, follows up on earlier messages, and can draft code, summarize files, generate images, or run multi-step research from one thread.

Where raw API access leaves wiring to you, ChatGPT bundles frontier GPT-5.6 models, memory, custom GPTs, voice, and agent workflows like ChatGPT Work and Codex behind a single login. The trade-off is less control over model parameters and tighter usage caps on Free and Go than you'd get calling the API directly.

It fits students drafting essays, developers debugging code, marketers shaping campaigns, and business teams that want shared workspaces with admin controls. OpenAI also publishes ChatGPT Business and Enterprise tiers with SSO, unified billing, and policies that keep workspace data out of model training.