What is Llama 2? Meta’s large language model explained

Llama 2 is a family of pre-trained and fine-tuned large language models (LLMs), ranging in scale from 7B to 70B parameters, from the AI group at Meta, the parent company of Facebook. According to Meta AI, Llama 2 Chat LLMs are optimized for dialogue use cases and outperform open-source chat models on most benchmarks they tested. Based on Meta’s human evaluations for helpfulness and safety, the company says Llama 2 may be “a suitable substitute for closed source …