The IEEE BigData 2025 Cup Challenge(www.bigdata2025.com), titled "Suicide Risk Prediction on Social Media," is a significant competition held annually under the auspices of the 2025 IEEE International Conference on Big Data (https://conferences.cis.um.edu.mo/ieeebigdata2025/). This challenge will take place over several months, scheduled for December 8–11, 2025, in Macau SAR, China. Focusing on social media activity, participants are tasked with predicting the level of suicide risk associated with posts made by users. This challenge underscores the increasing importance of big data in the field of mental health, and the pivotal role that predictive analytics can play in supporting early intervention strategies.

The topic of this year's IEEE BigData competition is user-level suicide risk detection on social media. The dataset contains over 10,000 Reddit posts from various users. Each user is represented by their historical posting text content, and the task for the competition participants is to develop a predictive model that can accurately classify users into four suicide risk levels based on their posting history. Such a model could play a crucial role in identifying individuals at risk of suicide across their social media post sequence, enabling more comprehensive risk assessment and providing opportunities for timely intervention and support.

The top 3 teams based on model performance will receive cash prizes. Additionally, we will conduct a comprehensive evaluation based on both report quality and model performance to invite teams to submit their work for publication in the conference proceedings, and to present their findings at the conference.

Important Dates:
1. Start of the competition, the task is revealed, Jul 15, 2025
2. Deadline for contest teams to submit email of intent, Sep 15, 2025
3. Deadline for submitting the source code & the detailed report of the solutions, End of the competition, Sep 30, 2025
4. Announcement of winning teams, Sending invitations for submitting papers for the special track at the lEEE BigData 2025 conference, Oct 15, 2025
5. Deadline for submitting invited papers, Oct 20, 2025
6. Notifcation of paper acceptance, Oct 30, 2025
7. Camera-ready of accepted papers due, Nov 15, 2025
8. The lEEE BigData 2024 conference, Macau SAR, China, Dec 8-11, 2025