**Highlights**
- Update New SegFormer models on ADE20K ([1705](https://github.com/open-mmlab/mmsegmentation/pull/1705))
- Dedicated MMSegWandbHook for MMSegmentation ([1603](https://github.com/open-mmlab/mmsegmentation/pull/1603))
**New Features**
- Update New SegFormer models on ADE20K ([1705](https://github.com/open-mmlab/mmsegmentation/pull/1705))
- Dedicated MMSegWandbHook for MMSegmentation ([1603](https://github.com/open-mmlab/mmsegmentation/pull/1603))
- Add UPerNet r18 results ([1669](https://github.com/open-mmlab/mmsegmentation/pull/1669))
**Enhancement**
- Keep dimension of `cls_token_weight` for easier ONNX deployment ([1642](https://github.com/open-mmlab/mmsegmentation/pull/1642))
- Support infererence with padding ([1607](https://github.com/open-mmlab/mmsegmentation/pull/1607))
**Bug Fixes**
- Fix typos ([1640](https://github.com/open-mmlab/mmsegmentation/pull/1640), [1667](https://github.com/open-mmlab/mmsegmentation/pull/1667), [1656](https://github.com/open-mmlab/mmsegmentation/pull/1656), [1699](https://github.com/open-mmlab/mmsegmentation/pull/1699), [1702](https://github.com/open-mmlab/mmsegmentation/pull/1702), [1695](https://github.com/open-mmlab/mmsegmentation/pull/1695), [1707](https://github.com/open-mmlab/mmsegmentation/pull/1707), [1708](https://github.com/open-mmlab/mmsegmentation/pull/1708), [1721](https://github.com/open-mmlab/mmsegmentation/pull/1721))
**Documentation**
- Fix `mdformat` version to support python3.6 and remove ruby installation ([1672](https://github.com/open-mmlab/mmsegmentation/pull/1672))
New Contributors
* RunningLeon made their first contribution in https://github.com/open-mmlab/mmsegmentation/pull/1642
* zhouzaida made their first contribution in https://github.com/open-mmlab/mmsegmentation/pull/1655
* tkhe made their first contribution in https://github.com/open-mmlab/mmsegmentation/pull/1667
* rotorliu made their first contribution in https://github.com/open-mmlab/mmsegmentation/pull/1656
* EvelynWang-0423 made their first contribution in https://github.com/open-mmlab/mmsegmentation/pull/1679
* ZhaoYi1222 made their first contribution in https://github.com/open-mmlab/mmsegmentation/pull/1616
* Sanster made their first contribution in https://github.com/open-mmlab/mmsegmentation/pull/1704
* ayulockin made their first contribution in https://github.com/open-mmlab/mmsegmentation/pull/1603
**Full Changelog**: https://github.com/open-mmlab/mmsegmentation/compare/v0.25.0...v0.26.0