OpenAI Build Week Online Join a global week of building with Codex $100,000 in prizes Winners announced 46676 participants
Cal Hacks 12.0 San Francisco, CA, USA This year's Cal Hacks is co-hosted by Claude, Fetch AI, AppLovin, and Amazon's Annapurna Labs! Together we'll assemble in SF for a weekend of hacking, friendship, and crazy ideas. $58,100 in prizes Oct 24 – 26, 2025 2156 participants
HackGwinnett 2.0 Lawrenceville, GA, USA Welcome to HackGwinnett 2.0! A free, fast-paced hackathon for Metro Atlanta students. $700 in prizes Oct 22, 2022 75 participants
HackGwinnett Lawrenceville, GA, USA Metro Atlanta's first exclusively high school hackathon. $425 in prizes Oct 16, 2021 64 participants
