Hermes 3 is an open-source AI model developed by Nous Research, based on Meta's Llama 3.1 architecture. It features advanced long-term context retention, multi-turn conversation management, and enhanced roleplaying abilities. Fine-tuned on a dataset of primarily synthetic responses, Hermes 3 excels in reasoning, creativity, and adaptability to user prompts. The model is available in various parameter sizes, including 8B, 70B, and 405B, catering to diverse application needs.