OpenAI DevDay Exchange Community Hackathon: Osaka

Name: OpenAI DevDay Exchange Community Hackathon: Osaka
Start: 2026-11-07
End: 2026-11-07
Location: Osaka

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About this hackathon

A one-day OpenAI Codex community hackathon in Umeda, Osaka on Nov 7, 2026 (13:00–19:00 JST) at Micware Innovation Lab Osaka, to turn ideas into working products with the new features announced at OpenAI DevDay. Teams of 2–4 must build with Codex CLI or the Codex App only (OpenAI models via Cursor, Devin or other agents don't count), publish the result on the web (e.g. Cloudflare Workers or Vercel), then demo, get judged and network. Build on the day; you may prepare an unpublished new prototype, but finished projects aren't allowed. Free; judging and prizes to be announced. The event page is in Japanese.

Status
Deadline: 2026-11-07
Starts: 2026-11-07
Who: Open to all (Teams of 2–4 (pre-formed teams recommended, team matching on the day); must use Codex CLI or Codex App; free; held in Japanese)
Level: Intermediate
Prize: Judging and prizes to be announced
Size: —
Format: In person · Osaka · International
Location: Osaka

Original listing (Chinese)

The full original listing below is in Chinese, as published in the Hack123 newsletter.

一句话简介：OpenAI Codex 社区在大阪梅田办的一日黑客松，⁠‍‍‍‍‌‍‌‍‌‌‌‍‍‍‌‌‌‍‍‌‌‍‌‍⁠用 DevDay 发布的新功能和 Codex 把点子做成能用的产品。

看点：2—4 人一队，建议提前组队，当天也会组队；只能用 Codex CLI 或 Codex App 开发，经 Cursor、Devin 等其他工具调用 OpenAI 模型不算；成果要部署到网上公开访问（可提前准备 Cloudflare Workers、Vercel 等）；当天开发，事前最多准备没公开过的新原型，不能带完成品；最后公开作品、演示、评审和交流会；免费，日语活动

奖金：评审方式和奖品待公布

截止日期：11月7日当天开赛（大阪，线下）

活动日期：2026年11月7日 13:00—19:00（日本时间，北京时间 12:00—18:00；大阪梅田 Micware Innovation Lab）

Summarized from the organizer’s page and public posts. Please confirm details on the official site before registering.

OpenAI DevDay Exchange Community Hackathon: Osaka

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Original listing (Chinese)