OpenAI Build Week Online Join a global week of building with Codex $100,000 in prizes Winners announced 46713 participants
Kiroween Online Build something wicked for Kiroween, our annual Halloween-themed hackathon where developers dare to code in dark mode $100,000 in prizes Winners announced 4970 participants
Google Chrome Built-in AI Challenge 2025 Online Innovate with Intelligence: Build the Future of the Web with Gemini Nano and Chrome AI. $70,000 in prizes Winners announced 14052 participants
Baseline Tooling Hackathon Online Accelerate availability of modern web features $10,000 in prizes Winners announced 2922 participants
Black Forest Labs - FLUX.1 Kontext [dev] Hackathon Online Build with FLUX.1 Kontext [dev], Black Forest Labs' open-weights editing model. $5,000 in prizes Winners announced 378 participants
![Black Forest Labs - FLUX.1 Kontext [dev] Hackathon](http://d112y698adiu2z.cloudfront.net/photos/production/challenge_thumbnails/003/754/951/datas/medium.png)