JAX is a Python package for array-oriented computation and program transformation. Built around it is a growing ecosystem of packages for specialized numerical computing across a range of domains; an up-to-date list of such projects can be found at Awesome JAX.
Though JAX is often compared to neural network libraries like PyTorch, the JAX core package itself contains very little that is specific to neural network models. Instead, JAX encourages modularity, where domain-specific libraries are developed separately from the core package: this helps drive innovation as researchers and other users explore what is possible.
Within this larger, distributed ecosystem, there are a number of projects that Google researchers and engineers have found useful for implementing and deploying the models behind generative AI tools like Imagen, Gemini, and more. The JAX AI stack serves as a single point-of-entry for this suite of libraries, so you can install and begin using many of the same open source packages that Google developers are using in their everyday work.
To get started with the JAX AI stack, you can check out Getting started with JAX. This is still a work-in-progress, please check back for more documentation and tutorials in the coming weeks!