MoBA

Judgement

What it is

Building block

What it does

Research code for Mixture of Block Attention, a trainable sparse attention method that lets each query attend only to the most relevant blocks of a long context.

Adopt it when

You train or continue-train long-context language models and want to test block sparse attention in place of full attention.

Watch out

Models must be further trained to benefit, so it does nothing for an existing pretrained model, and the repo has not been updated since April 2025.

Ready for

Experimental

Runs as

Library

Built with

Python, PyTorch and Hugging Face Transformers

How established

Young: started 20 months ago, no tagged release yet.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-06 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: MoBA → CPython → GCC → LLVM project → runs on a microchip

How compilers were built, back to punched paper tape

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