Nous Hermes
Community fine-tuned instruction model from Nous Research — top performer on open-source model leaderboards.
Overview
Nous Hermes is a series of open-source instruction-tuned language models developed by Nous Research, a community AI research collective. The models are fine-tuned from base models like Llama and Mistral using high-quality synthetic instruction datasets generated by GPT-4. Nous Hermes models consistently achieve top positions on open-source model leaderboards due to their careful dataset curation and training methodology.
Nous Research is an unusual organisation — a community of researchers and developers who collaborate open-source to push the frontier of open models. The Hermes models are specifically optimised for instruction following, multi-turn conversation, and complex reasoning, with less censorship than typical aligned models while maintaining safety.
Nous Hermes 2 Pro and Hermes 3 (based on Llama 3.1) achieved benchmark results that placed them among the top open-source instruction models at their respective sizes. The models are widely used by developers who want capable instruction following without the restrictive content policies of more conservatively trained models.
Pricing
Pricing shown for reference only. These figures reflect RECATOOLS research as of 8 May 2026 and may be out of date or incomplete. This is not financial or purchasing advice — always confirm the current price on the provider’s official website before making any decision.
Use cases
ASEAN Perspective
Nous Hermes in Southeast Asia
ASEAN-region availability and pricing notes coming soon. Drop the editorial team a note via /contact/ if you can supply local context (Singapore/Malaysia/Indonesia/Thailand/Vietnam).
Nous Hermes refers to Nous Research's well-regarded Hermes series of open fine-tuned models, built on bases like Llama and Mistral and known in the open-source community for strong instruction-following, steerability, and a less heavily filtered, more controllable feel. The weights are openly available and widely used through local runtimes and inference providers.
It suits developers, researchers, and hobbyists who want capable, customizable open models they can self-host and fine-tune, particularly those who prefer Nous's tuning philosophy. Caveats: it is a community model line, not a packaged product, so there is no first-party app, hosting, or support; quality depends on which specific Hermes release and base you choose; and running it well needs your own GPU/inference setup. ASEAN readiness is simply a function of where you host it.
Notable facts
- Nous Research is a fully decentralised research collective with no official company registration — entirely volunteer contributors working open source.
- Hermes 3 achieved performance comparable to Llama 3.1 8B Instruct while having fewer refusals on legitimate edge-case questions.
- The Nous Research community developed the synthetic training data technique of using GPT-4 to generate diverse instruction datasets, which became a standard approach across the open-source model fine-tuning community.
Frequently asked questions
About this listing
This entry was compiled from publicly available data including Nous Hermes's official website, press releases, documentation, and reputable third-party publications. RECATOOLS is not affiliated with Nous Hermes unless explicitly stated.
Third-party AI tools update their pricing, features, availability, and policies frequently. Information here may be outdated by the time you read this — we make reasonable efforts to keep listings current, but cannot guarantee absolute accuracy.
For the latest details, please refer to Nous Hermes directly →
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