Nous Research

Open-source AI research collective.

Nous Research releases open-weight models in the Hermes series, focused on open-ended reasoning and long-form generation.

nousresearch.com

4 model routes2 providersUS + EU regions27 Aug 2025 latest release

Models from Nous Research

Model	Context	Zero data retention	Training	Region	Provider
Hermes 3 Llama 3.1 70B Nous Research	131K	Zero data retention	No	US	DeepInfra
Hermes 3 Llama 3.1 405B Nous Research	131K	Zero data retention	No	US	DeepInfra
Hermes 4 405B Nous Research	131K	Not by default	No	EU	Nebius
Hermes 4 70B Nous Research	131K	Not by default	No	EU	Nebius

Release timeline

Every dated Nous Research release, newest first — 1 of 5 run on the Opper gateway today. Releases without a published date aren't listed. See the Nous Research release timeline.

Hermes 4 - Llama-3.1 70B27 Aug 2025 Hermes 4 - Llama-3.1 405B27 Aug 2025 DeepHermes 3 - Mistral 24B Preview13 Mar 2025 DeepHermes 3 - Llama-3.1 8B Preview13 Feb 2025

Hermes 3 Llama 3.1 70BOn Opper131K15 Aug 2024

Not currently available

Nous Research models without a live gateway route right now. Their pages stay up for reference — contact us if you'd like one added or brought back.

Hermes 2 Pro Llama 3 8BNot currently offered Nous Hermes Llama2 13BNot currently offered Openhermes2.5 Mistral 7BNot currently offered

Apps from Nous Research

Tools built by Nous Research, running on Opper. Point them at any of 700+ models — including Nous Research's own — with one key and a choice of region.

Hermes

Nous Research's open agent. Run it on any model on Opper.

Personalopper launch hermes