# Llama 3.1 405B Instruct

Llama 3.1 405B Instruct is a model from Meta with open weights, released on 23 Jul 2024.

- Developer: Meta
- Id: meta-llama/Llama-3.1-405B-Instruct
- Released: 2024-07-23T00:00:00.000Z
- Sighting: 2026-10-07T19:43:44.353Z
  - [evidence link](https://huggingface.co/meta-llama/Llama-3.1-405B-Instruct)
- Status: Released
- Canonical: https://alexgetman.com/models/meta/llama-3-1-405b-instruct-1132/

## Questions

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

Yes. Meta publishes the weights.

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

On 23 Jul 2024.

## Evidence links

- [Artificial Analysis · benchmarks](https://artificialanalysis.ai/models)
- [AWS Bedrock · lifecycle](https://docs.aws.amazon.com/en_en/bedrock/latest/userguide/model-lifecycle-legacy.html)
- [review](https://huggingface.co/meta-llama/Llama-3.1-405B-Instruct)
- [models.dev · catalogue](https://models.dev/#llama-3.1-405b-instruct)

## Signals

- [Llama 3.1 405B Instruct: Catalogue listing](https://alexgetman.com/signals/2026/09/17/llama-3-1-405b-instruct/)