{"rewrite":{"id":"r_95e12e3b53bbd6a86ea84db6","clusterId":"c_b16da4160cc98a5664284116","slug":"anthropic-opens-built-with-claude-japan-hackathon-applications-until-october-26","model":"deepseek-v4-1-flash","headline":"Anthropic Opens Built With Claude: Japan Hackathon Applications Until October 26","summary":"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.","whyItMatters":"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.","webCardHtml":"\u003cp\u003eApplications 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.\u003c/p\u003e\u003cp\u003eThe 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.\u003c/p\u003e","blueskyPost":"Anthropic caps Built With Claude: Japan at 250 seats and pays winners in API credits, not cash. The prize keeps the money inside the ecosystem it is promoting.","twitterPost":"Anthropic pays Built With Claude: Japan winners in API credits, not cash, keeping the $50,000 inside its own ecosystem.","threadsPost":"Anthropic's Built With Claude: Japan rewards winners with $50,000 in API credits rather than cash, and caps entry at 250 people by selection. The prize design keeps the payout inside the platform the hackathon is meant to promote.","newsletterBlurb":"Anthropic and Cerebral Valley have opened applications for Built with Claude: Japan 2026, an online hackathon from November 2 to 10 with 250 spots filled by selection and Japan residency required. Participants receive the Max 5x plan and $500 in API credits, and winners share $50,000 in API credits. Applications close October 26.","attributionJson":"[{\"source\":\"GameBusiness.jp\",\"url\":\"https://www.gamebusiness.jp/article/2026/10/15/28319.html\",\"title\":\"Claude Code Hackathon 'Built with Claude: Japan' Announced, Prizes Worth 8 Million Yen in API Credits; Applications Open Until October 26\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4732,"outputTokens":601,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1792018341,"createdAt":"2026-10-14T22:47:53.000Z","publishedAt":"2026-10-14T22:51:11.000Z","updatedAt":"2026-10-14T22:51:11.000Z"},"cluster":{"id":"c_b16da4160cc98a5664284116","canonicalTitle":"Claude CodeハッカソンBuilt with Claude: Japan発表、賞品は800万円分のAPIクレジット。10月26日まで申込み受付中","representativeArticleId":"a_b2407313e6121b3371302a11","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[\"Claude Code\"],\"studios\":[\"Anthropic\",\"Cerebral Valley\"],\"people\":[],\"type\":\"event\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-10-14T21:30:03.000Z","lastSeenAt":"2026-10-14T21:30:03.000Z","updatedAt":"2026-10-14T22:51:10.000Z"},"attribution":[{"source":"GameBusiness.jp","url":"https://www.gamebusiness.jp/article/2026/10/15/28319.html","title":"Claude CodeハッカソンBuilt with Claude: Japan発表、賞品は800万円分のAPIクレジット。10月26日まで申込み受付中"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":["Claude Code"],"studios":["Anthropic","Cerebral Valley"],"people":[],"type":"event","domain":"other","is_roundup":false},"keyFacts":null}