Hermes 4 Technical Report

Nous Research's Hermes 4 report - a hybrid reasoning + non-reasoning open chat model family trained on a uncensored mixture of public and Nous-curated data.

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Publisher: Nous Research
Year: 2025
Venue: blog
ArXiv: arxiv.org/abs/2508.18255
URL: nousresearch.com/hermes4
Code: huggingface.co/NousResearch/Hermes-4-405B
Authors: 3
Hosting: External sourcelicense unknown

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Abstract & full text: nousresearch.com/hermes4
TL;DR: Semantic Scholar
Code: huggingface.co/NousResearch/Hermes-4-405B

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Introduces 4 artifacts - 4 models

Artifacts

Models

Hermes 4 (405B)Hermes 4 - Llama-3.1 70B Hermes 4 - Qwen3 14B Hermes 4 - Llama-3.1 405B

Authors

Jeffrey Quesnelle Karan Malhotra Teknium (John Lin)