# Hugging Face — Ulysses Sequence Parallelism: Training with Million-Token Contexts

- Company: Hugging Face (huggingface.co)
- Announced: 2026-03-09T00:00:00+00:00
- Subject: Platform
- Source: https://huggingface.co/blog/ulysses-sp
- Record: https://forck.live/items/1537-ulysses-sequence-parallelism-training-with-million-token-contexts

This blog post explains Ulysses Sequence Parallelism, a technique for training large language models on long sequences by distributing attention computation across multiple GPUs via attention head parallelism. It covers the methodology, communication complexity, and integration with Hugging Face's Accelerate library.

## Evidence

Verbatim from https://huggingface.co/blog/ulysses-sp:

> Ulysses Sequence Parallelism (part of the Arctic Long Sequence Training (ALST) protocol from Snowflake AI Research) provides an elegant solution by distributing the attention computation across multiple GPUs through attention head parallelism.

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