LLM
GA
Open weights
Llama 3.1 405B
The reference open model of 2024-2025
Release2024-07-23
Context131K
Max output—
Parameters405B
Local / VRAM240–320 GB
LicenseOpen weights
Overview
Llama 3.1 405B is a model in the LLM category from Meta AI. It was released in 2024-07-23. The vendor is based in US. Best for: The reference open model of 2024-2025.
Hardware: Q4 ~230 GB; 8x H100 class.
Strengths
- 405B dense
- Broad ecosystem
- Strong foundation
Limits
- No vision
- Very large hardware
- Superseded by Llama 4
Specifications
| Vendor | Meta AI |
|---|---|
| Category | LLM |
| Release | 2024-07-23 |
| Status | GA |
| License | Open weights |
| License name | Llama 3.1 Community License |
| Commercial use | Conditional |
| Parameters | 405B |
| Architecture | dense transformer |
| 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 | High |
| Vendor country | US |
| Vendor type | Frontier 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.