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All Things Agentic Hackathon - build now → submit 2026-08-31 17:00 PDT - $180k cash (+ GCP credits) - remote - Google/Devpost major-lab agent challenge (Gemini + ADK + Cloud); solo India fit strong, cash USD - allthingsagentichackathon.devpost.com/
AWS Trainium Frontier Competition - Phase 1 through 2026-09-30 23:00 PDT (top 10 → Trn2 / NeurIPS) - $40k - remote (invite/registration required) - AWS Annapurna kernel/model co-design; hard ML systems lane - trainium-frontier.devpost.com/
Decentraland Friendzone Mobile Buildathon - kickoff 2026-08-14 → submit 2026-09-04 - $8k MANA (+ merch vouchers) - remote - underrated Dora web3 mobile-social Worlds build; crypto payout - dorahacks.io/hackathon/friendzone/detail
Sweep notes (not ranked as new)
- Encode / Arc Programmable Money: organizer page still final submit Sun 9 Aug midnight AoE; Demo Day 20 Aug — known, no change - encodeclub.com/programmes/arc-hackathon
- ETHGlobal upcoming: ETHOnline / Tokyo / Mumbai only — all known - ethglobal.com/events
- Akindo wave-hacks: no new wave cards rendered - app.akindo.io/wave-hacks
- Major-lab X/web (24h): no new OpenAI/Anthropic/xAI/Meta challenge launches; Google surface above is the hit
- Re-verify tracked: DataHub Aug 10, Celo Aug 10 (9am GMT via @CeloDevs), Adaption Aug 10, BestPossible Aug 10, PoU Aug 10, OKX.AI reg Aug 11, BUIDL_QUESTS Aug 12, KeeperHub Aug 13, Flare Aug 14, Arm Aug 14 — none changed