An abstract visualization of a neural network. Neurons of varying shapes and sizes are interconnected.

March 17, 2024

Open Release of Grok-1

March 17, 2024

We are releasing the weights and architecture of our 314 billion parameter Mixture-of-Experts model, Grok-1.

We are releasing the base model weights and network architecture of Grok-1, our large language model. Grok-1 is a 314 billion parameter Mixture-of-Experts model trained from scratch by xAI.

This is the raw base model checkpoint from the Grok-1 pre-training phase, which concluded in October 2023. This means that the model is not fine-tuned for any specific application, such as dialogue.

We are releasing the weights and the architecture under the Apache 2.0 license.

To get started with using the model, follow the instructions at

Model Details

  • Base model trained on a large amount of text data, not fine-tuned for any particular task.
  • 314B parameter Mixture-of-Experts model with 25% of the weights active on a given token.
  • Trained from scratch by xAI using a custom training stack on top of JAX and Rust in October 2023.

The cover image was generated using Midjourney based on the following prompt proposed by Grok: A 3D illustration of a neural network, with transparent nodes and glowing connections, showcasing the varying weights as different thicknesses and colors of the connecting lines.