Quantized version of Kaoru8/T5XXL-Unchained.
This is a fork of the T5-XXL encoder that uses an extended tokenizer to facilitate Flux uncensoring and offer other benefits to tokenization. More info is on the project's GitHub page.
As of 17.3.2025, third-party tools like ComfyUI and Kohya's training scripts don't yet support the new architecture. Their respective developers have been notified of this release, and may or may not choose to officially support it in a future update to their code. In the meantime, temporary patches for both tools are available in the GitHub repo linked above.