Submissions will be disabled at the end of year (December 31, 2025). If you want to submit a new competition before the end of September, which would end after December 31, 2025, we strongly recommend you use CodaBench

CodaBench is now our main portal for hosting competitions. We encourage you to start your new events on CodaBench, which is more recent, provides the same features as CodaLab, and even more! Note that CodaLab will be phased out in 2025 and will not allow new competitions after the end of September 2025.

Transitioning is quite simple and straightforward, and CodaLab bundles are compatible with Codabench. Simply follow this step-by-step guide: How to transition from CodaLab to Codabench?

We’re here to help you make a smooth transition, feel free to contact us if needed.

• Join the CodaLab competition Google group, to advertise your competitions, ask questions, or read news.
• To report bugs and problems you face, please open Github issues.
• Learn more about us.

Cite CodaLab Competitions in your research

@article{codalab_competitions_JMLR,
  author  = {Adrien Pavao and Isabelle Guyon and Anne-Catherine Letournel and Dinh-Tuan Tran and Xavier Baro and Hugo Jair Escalante and Sergio Escalera and Tyler Thomas and Zhen Xu},
  title   = {CodaLab Competitions: An Open Source Platform to Organize Scientific Challenges},
  journal = {Journal of Machine Learning Research},
  year    = {2023},
  volume  = {24},
  number  = {198},
  pages   = {1--6},
  url     = {http://jmlr.org/papers/v24/21-1436.html}
}