LLM
GA
Open weights
Hermes 4 405B
Lightly restricted roleplay and open reasoning
Release2025-08
Context131K
Max output—
Parameters405B
Local / VRAM240–320 GB
LicenseOpen weights
Overview
Hermes 4 405B is a model in the LLM category from Nous Research. It was released in 2025-08. The vendor is based in US. Best for: Lightly restricted roleplay and open reasoning.
Strengths
- Strong alignment alternative
- Open weights
Limits
- Large hardware footprint
- Llama license
Specifications
| Vendor | Nous Research |
|---|---|
| Category | LLM |
| Release | 2025-08 |
| Status | GA |
| License | Open weights |
| License name | Llama 3.1 Community License |
| Commercial use | Conditional |
| Parameters | 405B |
| Context window | 131K |
| Input modalities | Text |
| Output modalities | Text |
| Prompt types | Text |
| Negative prompts | No |
| Max outputs | 1 |
| Local deployment | Yes |
| VRAM | 240–320 GB |
| System RAM | 256–512 GB |
| API access | Yes |
| Pricing | Free weights |
| Confidence | Medium |
| Vendor country | US |
| Vendor type | Open lab |
Pricing & hardware
Free weights
This model can be self-hosted or run locally. Approximate GPU memory: 240–320 GB. Approximate system RAM: 256–512 GB. API access is available.