OpenAI Build Week Online Join a global week of building with Codex $100,000 in prizes Winners announced 46685 participants
SoCal Claude Builder Club Hackathon Los Angeles, CA, USA A one-day intercollegiate hackathon by Claude Builder Club — building AI for social impact, inspired by Anthropic's vision of a future where technology genuinely helps people. $1,499 in prizes Apr 19, 2026 90 participants
RealityShift Los Angeles, CA, USA USC’s XR Hackathon for Social Good. Non-monetary prizes Apr 18, 2026 55 participants