OpenAI Open Model Hackathon Online Build with gpt-oss, OpenAI’s open weight reasoning models. $30,000 in prizes Winners announced 8646 participants
Hack Reddit 2025 Online Create a new game or experience for the Reddit community! $36,000 in prizes Winners announced 1743 participants
Predictive AI In Healthcare with FHIR® Online Bringing AI and Evidence Together for SMARTer Decisions in Healthcare $25,000 in prizes Winners announced 2422 participants
DevFest 2025 New York, NY, USA DevFest is an annual week-long workshop series and hackathon held at Columbia University. $2,200 in prizes Feb 8 – 9, 2025 457 participants
Reddit Games and Puzzles Hackathon Online Create a new game or puzzle for the Reddit community! $116,000 in prizes Winners announced 1941 participants