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Hermes 3 405B

Parameters
405B
Published
Aug 14, 2024

Hermes 3 405B is an AI model developed by Nous Research (United States), first published in August 2024. It works in the language domain, on tasks such as language modeling/generation, chat and question answering.

Epoch AI has no training-compute estimate for this model. The model has 405,000,000,000 parameters. It was trained on roughly 270M datapoints. Training ran on 128 NVIDIA H100 SXM5 80GB.

Access: Open weights (restricted use). Its weights are openly available. It is built on top of Llama 3.1-405B. Epoch AI rates the confidence of this record as confident.

Full record
Organization
Nous Research
Country of organization
United States
Domain
Language
Task
Language modeling/generation, Chat, Question answering
Compute estimation method
Hardware, Operation counting
Parameters
405,000,000,000
Dataset size
270M
Training hardware
NVIDIA H100 SXM5 80GB
Chips used
128
Chip-hours
2.1K
Training power draw
176.7 kW
Model accessibility
Open weights (restricted use)
Open weights
Yes
Base model
Llama 3.1-405B
Epoch confidence
Confident
More from Nous Research
SourceEpoch AI, 'AI Models'. Published online at epoch.ai. Retrieved 2026-07-29 from https://epoch.ai/data/ai-models. Licensed under CC BY 4.0.
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