Nous: Hermes 4 405B
Nous • LLM
Hermes 4 is a large-scale reasoning model built on Meta-Llama-3.1-405B and released by Nous Research. It introduces a hybrid reasoning mode, where the model can choose to deliberate internally with...
Specifications
Context Window
131K tokens
Input Price/1M
$1.00
Output Price/1M
$3.00
Parameters
—
Information
- Tool Calling
- ❌ Not supported
- Vision
- ❌ Not supported
- Audio
- ❌ Not supported
Full Analysis: Nous: Hermes 4 405B
What is Nous: Hermes 4 405B?
Nous: Hermes 4 405B is an AI model developed by Nous, classified as a large language model (LLM). It focuses on text processing and natural language generation. As an open source model, it is available for download, customization, and on-premises deployment. With a context window of 131K tokens, it is suitable for processing long documents such as contracts, books, and complete codebases.
Pricing & Costs in 2026
Nous: Hermes 4 405B is usage-based, priced at $1/1M input tokens and $3/1M output tokens. For context: 1 million tokens is approximately 750,000 words, or about 10 average-length books. The mid-range pricing balances quality and cost for most professional applications.
Benchmarks & Performance
We don't have detailed benchmark results for Nous: Hermes 4 405B yet. Benchmarks are updated weekly as new data becomes available from sources like Artificial Analysis, LM Arena, and LiveBench.
It's important to note that benchmarks measure specific aspects and don't capture the full user experience. Factors like instruction adherence, behavior in long conversations, and real-world task quality vary significantly between models and aren't always reflected in standard scores.
Recommended Use Cases
Nous: Hermes 4 405B is suitable for a wide range of AI applications: long document analysis (contracts, legal proceedings, codebases), complex reasoning, math problem solving, and logical analysis, text generation, summarization, translation, and general assistance.
Comparison with Alternatives
In the 2026 AI model ecosystem, Nous: Hermes 4 405B competes directly with similarly capable models. Nous competes in this segment against OpenAI, Anthropic, Google, and Meta. The choice between models depends on the specific use case, budget, latency requirements, and need for features like multimodality and tool calling.
For a detailed side-by-side comparison, use our comparison tool or check the overall model ranking.
Frequently Asked Questions
What is Nous: Hermes 4 405B?
Hermes 4 is a large-scale reasoning model built on Meta-Llama-3.1-405B and released by Nous Research. It introduces a hybrid reasoning mode, where the model can choose to deliberate internally with...
How much does Nous: Hermes 4 405B cost?
Nous: Hermes 4 405B costs $1/1M input tokens and $3/1M output tokens. For heavy usage (e.g., a chatbot handling 100k messages/month), costs can range from $10 to $1,000 depending on volume.
How does Nous: Hermes 4 405B compare with other models?
We don't have detailed benchmarks for Nous: Hermes 4 405B yet. Check the main benchmark page to compare available models.
Is Nous: Hermes 4 405B open source?
Yes, Nous: Hermes 4 405B is an open source model. You can deploy it on-premises, customize it via fine-tuning, and maintain full control over your data. Check the official repository for the specific license.
What is Nous: Hermes 4 405B best for?
Nous: Hermes 4 405B excels at complex reasoning and problem solving. With its large context window, it handles long documents, codebases, and extended conversations.
Last updated: May 24, 2026 • View methodology →