OpenAI Open Model Hackathon Online Build with gpt-oss, OpenAI’s open weight reasoning models. $30,000 in prizes Winners announced 8648 participants
EF x Anthropic Hackathon Greater London, United Kingdom Join us for a relaxed evening of coding in London. We're bringing together devs, founders, and students for a casual 3-hour session to build cool stuff in good company. Non-monetary prizes May 15, 2025 33 participants