The DialNav Challenge

Task

DialNav evaluates a navigation-and-dialog loop: the Navigator starts from an initial node with only a vague instruction, while the Guide helps it reach the target location through dialog when needed.

• We release Navigator and Guide code, along with trained weight sets derived from the RAIN and RAINbow papers.
• These released models follow a modular design, but the challenge allows flexible agent designs.
• These models can be used as-is or as a starting point for further development.
• Participants develop their own Navigator, Guide, or both.

How to Participate

1. Build your own agents based on the DialNav baseline code and GitHub repository.
2. Upload the required log files to the Leaderboard.
3. Top performing teams will be asked to submit a reproducible GitHub repository and a technical report.

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Provided Training Datasets

The challenge provides the following two datasets for training, but participants can freely use any additional data, pretrained models, or external resources as long as they are clearly described in the technical report.

• RAIN dataset: Human-annotated navigation episodes with detailed instructions. Paper, Data
• RAINbow dataset: An augmented dataset that reformats RxR, R2R, and CVDN for the DialNav task. Paper, Data

Rules & Policy

• Participants may modify the Navigator, the Guide, or both.
• Communication between the Navigator and Guide must use natural language only; other modalities, including images, are not allowed.
• Manual annotation of the evaluation set is not allowed.
• Using val-seen, val-unseen, or test data to directly train or adapt the evaluation environment is not allowed.
• Because this challenge uses a Guide Agent setup, the ground-truth target location is disclosed for the test dataset. However, this disclosure is provided only for the challenge protocol and evaluation setup, and parameter tuning on the test dataset is not allowed.
• Dialog and navigation turns are not limited.
• The Navigator cannot re-guess once the episode ends, whether or not the target is reached.
• External datasets, pretrained models, and commercial APIs are allowed and must be clearly described in the technical report.
• Technical report must include the seeds and other execution details needed to reproduce the reported results. If a submission cannot be reproduced or the scoring cannot be reconstructed, it may be marked invalid.

Dates

• Jun 3 - Aug 12 - Challenge period
• Aug 15 - Code and technical report submission deadline
• Aug 22 - Notification
• TBA - Workshop presentation

Organizers

• 
  Leekyeung Han Korea University
• 
  Hyunji Min Korea University
• 
  Minyoung Kim Korea University
• 
  Jinseong Jeong Korea University
• 
  Paul Hongsuck Seo Korea University

Contact: happilee12@korea.ac.kr

Citation

If you use the DialNav challenge materials, please cite the relevant papers below.

@inproceedings{han2025dialnav,
  title={DialNav: Multi-turn Dialog Navigation with a Remote Guide},
  author={Han, Leekyeung and Min, Hyunji and Hwangbo, Gyeom and Choi, Jonghyun and Seo, Paul Hongsuck},
  booktitle={Proceedings of the IEEE/CVF International Conference on Computer Vision (ICCV)},
  year={2025}
}

[TBA - insert the official RAINbow paper citation here]

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