Hermes 4

What it is

Hermes 4 is a versatile AI model designed for developers and researchers who require high-performance text generation in a self-hosted environment. It builds upon previous iterations to offer improved capabilities in coding, complex reasoning, and agentic tool use. The model is particularly suited for users seeking an alternative to proprietary, closed-source APIs.

How it helps you

Hermes 4 gives you open-weight models you can run locally or fine-tune — full control without sending proprietary code to closed APIs.

Key benefits

• ✦ Strong reasoning and tool-calling
• ✦ Run offline on your own hardware
• ✦ Fine-tune for domain-specific tasks
• ✦ Less restrictive than many commercial models

How to set up

1. 01 Visit hermes4.nousresearch.com for model cards.
2. 02 Download weights or use a hosted inference provider.
3. 03 Run via Ollama, vLLM or compatible runtime.
4. 04 Connect to agents via OpenAI-compatible endpoint.