The Australian Computational and Linguistics Olympiad (OzCLO) is a volunteer-run contest about language for secondary school students (years 7-12). The contest challenges students to develop their own strategies in teams of four to solve problems about fascinating real languages.
OzCLO 2025 is now complete. Thank you to all students and teachers for being a part of the competition!
OzCLO 2026 timeline
OzCLO 2026 registration opens
Registration closes
Round 1 Online Regional Competition
Round 2 National Competition
Congratulations to our IOL 2025 teams, who competed in Taipei in July 2025!
Team Naarm: Georgios Pirpiris, Nicholas Wang, Hugo Chang, Benjamin Jin Yu Chen (Melbourne Grammar School)
Team Warrang: Luke Kelman, William Chung, David Lu, Felix Eibl (Sydney Grammar School)
Particular congratulations to Nicholas Wang (55.5) on his honourable mention, and Hugo Chang on his silver medal (76.5)!
Registration for 2025 is closed. Information for 2026 will be available early in the new year.
Find training material and past problems here.
Archive of problems used in previous competitions.
How OzCLO works, and who we are.
ABN 53752617881
More information for OzCLO 2026 will be available in the new year