# RF-DETR - New Sizes Available New RF-DETR (Roboflow Detection Transformer) sizes were added with support for model training and deployment. This delivers better flexibility when choosing the right mix of accuracy and latency for your computer vision project. New model sizes released: * RF-DETR Segmentation: Nano, Small, Medium, Large, X Large, 2X Large * RF-DETR Object Detection: X Large and 2X Large [Learn more](https://blog.roboflow.com/rf-detr-segmentation/) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.roboflow.com/changelog/explore-by-month/january-2026/rf-detr-new-sizes-available.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.