A solo maker built a World Cup app with Claude Fable
A Reddit user shared a free open-source web app for the 2026 World Cup. The app includes schedules, brackets, squads, venue maps, weather, TV listings, win probabilities, and champion forecasts. The maker said the app was also a way to test Claude Fable, and that building it took many iterations. They said Fable is good, but not much better than Opus 4.8 given its 2x API price.
Key points
- The project is a free open-source web app for the 2026 World Cup.
- It is designed to be simple and fast on desktop and mobile.
- The app says it updates data daily, and every 15 minutes during live matches.
- The maker says the whole app was built with Claude Fable, but needed many iterations.
- The maker says Claude Fable is good, but not clearly worth 2x the API price over Opus 4.8.
Quick term guide
- open-source
- Software whose code is shared publicly so others can inspect, use, or change it.
- Claude Fable
- A new Claude AI model released by Anthropic in June 2026
- Iteration
- The act of repeating a process to reach a desired goal or result.
- Opus 4.8
- A high-end Claude AI model named by the project.
- Solo developer
- An individual who handles all parts of creating a project or product alone.
- developers
- Developers are people who build software, apps, or websites.
- AI coding tool
- Software that uses AI to help write, edit, or explain code.
- codebase
- The full set of files and code that make an app or product work.