Atlas (language model)
Atlas is a retrieval-augmented language model developed by researchers at Meta AI (the group then known as Facebook AI Research, or FAIR).
Large Language Models
Explore language models, how they work, and the techniques used to build applications with them.
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Byte Latent Transformer
The Byte Latent Transformer (BLT) is a tokenizer-free large language model architecture introduced by researchers at Meta AI's Fundamental AI Research (FAIR) group in December 2024.
Code Llama
Code Llama is a family of open-weight large language models specialized for code generation and understanding, released by Meta AI on August 24, 2023.
Galactica (language model)
Galactica is a large language model for science, built by the Papers with Code team at Meta AI and released on 15 November 2022.
LLM Compiler (Meta)
The Meta Large Language Model Compiler, usually shortened to LLM Compiler, is a family of pre-trained large language model models built by Meta AI for code and compiler optimization tasks.
LLaMA
LLaMA is the original name of a family of large language models developed by Meta AI.
LLaMA/Model Card
The Llama model card is the official documentation that Meta AI ships with each release of the Llama family of large language models.
Llama 2
Llama 2 is a family of open-weight large language models developed by Meta AI. Meta released pretrained and dialogue-tuned checkpoints with 7 billion, 13 billion, and 70 billion parameters on July 18, 2023.
Llama 3
Llama 3 is a family of open-weight large language models developed by Meta. Meta released the original Llama 3 checkpoints on April 18, 2024, in 8-billion-parameter and 70-billion-parameter sizes.
Llama 3.1
Llama 3.1 is a family of open-weight large language models released by Meta on July 23, 2024, in three sizes, 8 billion, 70 billion, and 405 billion parameters, each shipped in both a pre-trained base form and…
Llama 3.2
Llama 3.2 is a family of four open-weight large language models released by Meta on September 25, 2024, comprising lightweight 1 billion and 3 billion parameter text-only models for on-device AI and the 11…
Llama 3.2 Vision
Llama 3.2 Vision is the set of multimodal (image-plus-text) models in Meta's Llama 3.2 family, released on September 25, 2024 at the Meta Connect 2024 developer conference.
Llama 3.3
Llama 3.3 is an instruction-tuned, text-only large language model with 70 billion parameters that Meta released on December 6, 2024
Llama 4
Llama 4 (Large Language Model Meta AI 4) is a family of natively multimodal large language models developed by Meta and released on April 5, 2025, the first generation of the Llama series to use a mixture of…
Llama 4 Behemoth
Llama 4 Behemoth is the announced but never publicly released flagship model in the Llama 4 family from Meta AI.
Llama 4 Scout and Maverick
Llama 4 Scout and Llama 4 Maverick are open-weight, natively multimodal AI large language models developed by Meta and released on April 5, 2025.
Muse Glimmer
Muse Glimmer is an open-weight text-and-image model developed by Meta AI for local agent and coding workloads. Meta released the model on August 10, 2026 under the identifier meta-models/Muse-Glimmer-30B.
OPT (Open Pre-trained Transformer)
OPT (Open Pre-trained Transformer) is a suite of decoder-only large language models released by Meta AI in May 2022, ranging from 125 million to 175 billion parameters and built to reproduce the scale and…
SpiRit-LM
SpiRit-LM (also written Spirit LM) is a large language model from Meta AI's Fundamental AI Research (FAIR) group that handles spoken and written language inside a single model.
Toolformer
Toolformer is a research language model from Meta AI that learns, in a self-supervised way, to call external software tools through simple text-based API calls.