# Llama 3.1 405B Instruct NVFP4

Llama 3.1 405B Instruct NVFP4 is a model from NVIDIA with open weights, first recorded on 11 Nov 2026; its release date is not established.

- Developer: NVIDIA
- Id: nvidia/Llama-3.1-405B-Instruct-NVFP4
- Sighting: 2026-11-11T22:43:02.319Z
  - [evidence link](https://huggingface.co/nvidia/Llama-3.1-405B-Instruct-NVFP4)
- Status: Released
- Weights version: 2025-02-26
  - [evidence link](https://huggingface.co/api/models/nvidia/Llama-3.1-405B-Instruct-NVFP4/paths-info/8ddfc523e75da0cd52d8d486895aa984282f6db9)
- Canonical: https://alexgetman.com/models/nvidia/llama-3-1-405b-instruct-nvfp4/

## Questions

### Are the weights of Llama 3.1 405B Instruct NVFP4 publicly available?

Yes. NVIDIA publishes the weights.

### When was Llama 3.1 405B Instruct NVFP4 released?

Its release date is not established. Signal Forge first recorded it on 11 Nov 2026.

## Evidence links

- [hf-author-artifacts:nvidia](https://huggingface.co/api/models/nvidia/Llama-3.1-405B-Instruct-NVFP4/paths-info/8ddfc523e75da0cd52d8d486895aa984282f6db9)
- [huggingface:nvidia](https://huggingface.co/nvidia/Llama-3.1-405B-Instruct-NVFP4)

## Signals