CALL-E: Your Code Is Calling Online Turn your code into an AI agent that makes real phone calls. $10,000 in prizes Winners announced 3198 participants
DevNetwork [API + Cloud + AI] Hackathon 2026 Santa Clara, CA, USA Join the nation's largest challenge-driven API + Cloud + AI hackathon @ API World 2026! $39,500 in prizes Aug 17 – Sep 3, 2026 1372 participants
OpenAI Build Week Online Join a global week of building with Codex $100,000 in prizes Winners announced 46665 participants