Hermes 3 405B Instruct

About Hermes 3 405B Instruct

Hermes 3 Llama 3.1 405B is Nous Research's flagship fine-tune, combining Meta's largest open model with specialized instruction tuning. The model excels at following complex instructions, roleplay, and creative tasks while maintaining Llama 3.1 405B's strong reasoning capability. Hermes 3 demonstrates particularly good performance on nuanced conversations and tasks requiring careful instruction following. It features a 128K context window and supports function calling for building AI agents. The model is popular for applications requiring both capability and personality. For developers seeking the most capable open-source model with enhanced instruction following, Hermes 3 405B offers frontier-level performance with community-driven improvements. It's particularly valuable for advanced chatbots, creative applications, and sophisticated AI assistants.

Model Specifications

💰 Real-World Cost Examples

Estimated monthly costs for common use cases

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🚀 Quick Start

Get started with Hermes 3 405B Instruct API

from openai import OpenAI

client = OpenAI(
    base_url="https://api.provider.com/v1",
    api_key="YOUR_API_KEY"
)

response = client.chat.completions.create(
    model="nousresearch/hermes-3-llama-3.1-405b",
    messages=[
        {"role": "user", "content": "Hello!"}
    ]
)
print(response.choices[0].message.content)

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