Author's Description
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...
Key Specifications
Supported Parameters
This model supports the following parameters:
Features
This model supports the following features:
Performance Summary
Nous: Hermes 4 405B demonstrates competitive response times, ranking in the 59th percentile across various benchmarks, and offers moderate pricing, positioned in the 39th percentile. A standout feature is its exceptional reliability, achieving a 100% success rate across all evaluated benchmarks, indicating robust technical stability. The model excels in specific areas, achieving perfect accuracy in both Hallucinations (100%) and Ethics (100%) benchmarks, highlighting its strong alignment and ability to acknowledge uncertainty. It also shows strong performance in General Knowledge (99.5%) and Email Classification (99.0%), indicating broad utility in information retrieval and categorization tasks. Its hybrid reasoning mode, allowing internal deliberation, likely contributes to its strong performance in these areas. However, Hermes 4 exhibits some weaknesses. Its Instruction Following accuracy is 61.0%, suggesting room for improvement in handling complex, multi-layered directives. Similarly, its Mathematics accuracy (79.0%) and Reasoning accuracy (72.0%) are in the lower percentiles, indicating that while it has an expanded post-training corpus emphasizing reasoning, there are still challenges in advanced problem-solving. Coding performance is moderate at 83.0%. Overall, Hermes 4 is a reliable and ethically sound model with strong general knowledge and classification capabilities, but its performance in complex instruction following and advanced mathematical/logical reasoning could be further enhanced.
Model Pricing
Current Pricing
| Feature | Price (per 1M tokens) |
|---|---|
| Prompt | $1 |
| Completion | $3 |
Price History
Available Endpoints
| Provider | Endpoint Name | Context Length | Pricing (Input) | Pricing (Output) |
|---|---|---|---|---|
|
Nebius
|
Nebius | nousresearch/hermes-4-405b | 131K | $1 / 1M tokens | $3 / 1M tokens |
|
Chutes
|
Chutes | nousresearch/hermes-4-405b | 131K | $1 / 1M tokens | $3 / 1M tokens |
Benchmark Results
| Benchmark | Category | Reasoning | Strategy | Free | Executions | Accuracy | Cost | Duration |
|---|
Other Models by nousresearch
|
|
Released | Params | Context |
|
Speed | Ability | Cost |
|---|---|---|---|---|---|---|---|
| Nous: Hermes 4 70B | Aug 26, 2025 | 70B | 131K |
Text input
Text output
|
★★★★ | ★★★ | $$ |
| Nous: DeepHermes 3 Mistral 24B Preview Unavailable | May 09, 2025 | 24B | 32K |
Text input
Text output
|
★★★★ | ★★★ | $$ |
| Nous: DeepHermes 3 Llama 3 8B Preview Unavailable | Feb 27, 2025 | 8B | 131K |
Text input
Text output
|
— | — | $ |
| Nous: Hermes 3 70B Instruct | Aug 17, 2024 | 70B | 12K |
Text input
Text output
|
★★★★ | ★★★ | $$ |
| Nous: Hermes 3 405B Instruct | Aug 15, 2024 | 405B | 131K |
Text input
Text output
|
★★★ | ★★★ | $$$ |
| NousResearch: Hermes 2 Pro - Llama-3 8B | May 26, 2024 | 8B | 8K |
Text input
Text output
|
★★★★★ | ★★ | $ |
| Nous: Hermes 2 Mixtral 8x7B DPO Unavailable | Jan 15, 2024 | 56B | 32K |
Text input
Text output
|
★★★ | ★ | $$$$ |