AI · AI model

Hermes 3

Open-weights fine-tune of Llama 3.1 built for agentic function calling.

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Hermes 3 is an open-source model series by Nous Research fine-tuned on Llama 3.1 across 8B, 70B, and 405B parameters. It is trained primarily on synthetic data with an emphasis on following system prompts precisely, internal monologue reasoning, and multi-turn conversations. Its structured function-calling support makes it popular for building custom autonomous agents and workflows.

What it's for

  • Power autonomous AI agents that invoke external APIs and tools
  • Drive conversational workflows requiring strict adherence to system prompts
  • Handle complex roleplay and internal monologue reasoning tasks

Features

  • Fine-tuned versions across 8B, 70B, and 405B parameter scales
  • Enhanced agentic function-calling capabilities
  • Strong adherence to system instructions without heavy safety guardrail interference
  • Long-term context retention across multi-turn conversations
  • Open weights available on Hugging Face

Pricing

Open source. Free open-weights model; compute or hosting costs apply.

Details

Type
AI model
Category
AI
Topic
Language Models
Open source
Yes
Platforms
Web, API, Self-hosted
For
AI developers, automation builders, and researchers needing unconstrained open-weights models.
Alternative to
Llama 3.1, Mistral Large, GPT-4o
Tags
llm, open source, agents, function calling, nous research, llama

Why it was saved

  • @jordanlee__, 21 May 2025: Used by the creator as an autonomous AI SDR agent to book sales appointments on autopilot.
  • @jordanlee__, 5 May 2025: Presented as an autonomous SDR agent capable of booking sales calls automatically.

Compare

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