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| # DeepSpeed | |
| [DeepSpeed](https://github.com/microsoft/DeepSpeed), powered by Zero Redundancy Optimizer (ZeRO), is an optimization library for training and fitting very large models onto a GPU. It is available in several ZeRO stages, where each stage progressively saves more GPU memory by partitioning the optimizer state, gradients, parameters, and enabling offloading to a CPU or NVMe. DeepSpeed is integrated with the [`Trainer`] class and most of the setup is automatically taken care of for you. | |
| However, if you want to use DeepSpeed without the [`Trainer`], Transformers provides a [`HfDeepSpeedConfig`] class. | |
| <Tip> | |
| Learn more about using DeepSpeed with [`Trainer`] in the [DeepSpeed](../deepspeed) guide. | |
| </Tip> | |
| ## HfDeepSpeedConfig | |
| [[autodoc]] integrations.HfDeepSpeedConfig | |
| - all | |