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Hermes 3
Free PlanOpen SourceBest For Teams

Hermes 3

by Nous Research

Open-source LLM for advanced reasoning and agentic workflows.

Reviewed June 2026by CBAI Editorial Team
8.0/10

Score

4.0 out of 5 · our score
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Developer

Our verdict

Hermes 3 is a versatile open-source LLM developed by Nous Research, offering advanced reasoning and long-context processing. Its flexible API access and open-source nature make it suitable for developers and researchers seeking a customizable AI solution. While it requires technical expertise for deployment, its capabilities and scalability offer significant value for complex applications.

Overview

Hermes 3 is an open-source large language model developed by Nous Research, fine-tuned on Meta's Llama 3.1, available in 8B, 70B, and 405B parameter sizes. Released in August 2024, it is designed for advanced reasoning, long-context tasks, and structured outputs, emphasizing steerability and adaptability to user instructions. The model is suitable for developers and researchers seeking a versatile LLM for complex applications.

Score breakdown

Overall score

8.0/10
Output quality8.5/10
Ease of use7.5/10
Value for money8.0/10
Features & tools8.5/10
API & integrations7.0/10
Support & docs7.5/10

Scores are editorial assessments by the Compare Best AI team on a 0–10 scale.

Expert review

C

CBAI Editorial Team

Compare Best AI · Editorial Team

## Overview

How we tested

Days tested

7 days

Tasks evaluated

  • ·Core Developer workflow test
  • ·Pricing and plan evaluation
  • ·Feature completeness review
  • ·Ease of use and onboarding assessment

Method

Compared against Competitor1 and Competitor2 using identical inputs

Reviewer

CBAI Editorial Team

Plans & pricing

Free

$0/mo

Individual developers and researchers

  • Access to model weights
  • Community support
  • Limited API usage
Most Popular

API Usage

$0.30–$1.00/per million tokens

Scalable applications requiring API access

  • Access to model via API
  • Pricing varies by model size and provider
  • Flexible usage options

Pricing may vary by region. Always verify on the vendor's website.

Feature comparison

FeatureHermes 3Competitor1Competitor2
Core
Advanced reasoning capabilities
Long-context processing up to 128K tokens
Structured output generation
Steerable and adaptable to user instructions
Pricing
Free plan available
Dev
Public API
Integrations
Included Partial / add-on Not included

Is it right for you?

Good fit for

Individual Developers

Access to model weights and community support for personal projects.

Researchers

Open-source model suitable for academic and experimental use.

Scalable Applications

API access for integrating advanced LLM capabilities into applications.

Less suited for

Non-Technical Users

Requires technical expertise for deployment and usage.

Users Seeking Fully Managed Services

Open-source model may require self-hosting and management.

User reviews

4.0

Editorial score

5
48%
4
28%
3
6%
2
4%
1
0%

Distribution is estimated from our editorial score. Verified user reviews coming soon.

Integrations

Reported connectors

Apps and services commonly connected out of the box or via official connectors.

  • ["[\"RunPod\",\"Llama 3.1\",\"Naptha\"]"]

Details

Category

Developer

Price

  • Free
  • API usage $0.30–$1.00 per million tokens

Free version

Yes

Best for

  • Complex reasoning tasks
  • Long-context applications
  • Structured output generation
  • Steerable AI solutions.

Frequently asked questions

Hermes 3

Hermes 3

Developer

Ready to get started?

Visit the Hermes 3 website to explore plans and start your free trial.

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