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Llama 2

by Meta

About the model:

Llama AI model family by Meta. This entry provides information about Llama version 2.

Model type:

Text

Model performance class:

Full

Link to the model:

https://ai.meta.com/resources/models-and-libraries/llama/

Base models:

Llama-2-70B

End model:

Llama-2-70B-Chat

End model license:

Unclear

About the organisation:

Meta, a major technology company.

Link to the organisation:

https://ai.meta.com/

Model release date:

August 2023

Availability

Base Model Data

Data nowhere disclosed or documented, and described only in the vaguest terms in a corporate preprint released by Meta

https://ai.meta.com/research/publications/llama-2-open-foundation-and-fine-tuned-chat-models/

End User Model Data

RLHF data including 1 million Meta-specific tuning prompts not made available (even as it incorporates some open RLHF datasets)

Base Model Weights

Download only after requesting access; requires signing a consent form

https://ai.meta.com/resources/models-and-libraries/llama-downloads/

End User Model Weights

Download only after requesting access; requires signing a consent form

https://ai.meta.com/resources/models-and-libraries/llama-downloads/

Training Code

Repository only offers 'a minimal example to load Llama 2 models and run inference'; no training, fine-tuning, evaluation code made available

https://github.com/facebookresearch/llama/tree/main

Documentation

Code Documentation

Code only covers minimal examples; no documentation available.

Hardware Architecture

Architecture sketched in corporate preprint.

https://ai.meta.com/research/publications/llama-2-open-foundation-and-fine-tuned-chat-models/

Preprint

Corporate preprint quite some detail on pretraining, RLHF, and safety measures but none on datasets.

https://ai.meta.com/research/publications/llama-2-open-foundation-and-fine-tuned-chat-models/

Paper

No peer-reviewed paper found

Modelcard

There is a model card, but it provides the absolute minimum of detail, and none whatsoever on training data.

https://github.com/facebookresearch/llama/blob/main/MODEL_CARD.md

Datasheet

Datasheet not provided.

Access

Package

Package not provided

API and Meta Prompts

API not available in EU.

https://llama.developer.meta.com/join_waitlist

Licenses

Usage requires signing Meta's bespoke 'community license', not an OSI recognised open license

https://github.com/facebookresearch/llama/blob/main/LICENSE

Last updated 17 June 2025

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