Anthropic Opens Built With Claude: Japan Hackathon Applications Until October 26
The Japan edition carries half the capacity and half the prize pool of the three earlier Built with hackathons, so Anthropic is scaling its Japanese developer outreach down in size while adding a Max 5x subscription on top of the API credits.
Reporting from 1 source: GameBusiness.jp.
Anthropic and AI community Cerebral Valley will run the online hackathon Built with Claude: Japan 2026 from November 2 to 10, with applications open until October 26. Capacity is 250 people by selection, and Japan residency is required. Participants receive the Max 5x plan and $500 in API credits; winners share $50,000, about 8 million yen, in API credits rather than cash.
Applications close October 26 at 11:59 PM Japan time, and the event runs November 2 to 10. Teams may have up to two people, and every member must apply and pass selection separately.
The announcement names two starting points for projects: something drawn from an area the entrant knows best, such as inherited skills or daily work inconveniences, and efforts to widen access to something that reached only some people, with the aging population and labor shortages given as examples. Anthropic says it will introduce the projects and their creators.
Synthesized by Yomimono from the 1 cited source below, including Japanese-language reporting where cited, then editorially reviewed before publishing.