uccl
UCCL is an efficient communication library for GPUs, covering collectives, P2P (e.g., KV cache transfer, RL weight transfer), and EP (e.g., GPU-driven)
Communicate efficiently between GPUs for machine learning tasks, making it easier to work with different types of GPUs.
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Free · no card · unsubscribe anytimeUCCL is an efficient communication library for GPUs, covering collectives, P2P (e.g., KV cache transfer, RL weight transfer), and EP (e.g., GPU-driven)
uccl has 1.5k stars on GitHub. It has been forked 171 times. uccl is written mainly in C++. It has been in active development since 2025. uccl is available under the Apache-2.0 license. Its main topics are ai, allreduce, amd, broadcom.
What is uccl?
UCCL is an efficient communication library for GPUs, covering collectives, P2P (e.g., KV cache transfer, RL weight transfer), and EP (e.g., GPU-driven)
Is uccl open source?
uccl is an open-source project. It is released under the Apache-2.0 license.
Is uccl free?
Yes. uccl is free and open source — you can use, modify and self-host it.
What license does uccl use?
uccl is available under the Apache-2.0 license.
What language is uccl written in?
uccl is written mainly in C++.
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