Hackathon radar

backend grok-cli (SuperGrok Heavy sub, $0 marginal) · window last 24h

none changed.

Ranked new / changed (prize × fit × lead-time)

1. BuildX AI Season (X Layer / OKX) — build 2026-08-07 → 2026-08-21; submission 2026-08-21 23:59 UTC — up to $300k USDT ($50k fixed grants + $50k liquidity + up to $200k launch volume grants) — remote — AI×onchain apps on X Layer; solo OK; USDT rails; must put AI in product, deploy testnet→mainnet, active X account — organizer · X announce · form linked from page

2. OKX.AI Trading Hackathon Season 1 — prize CHANGE → $40k (doubled; @okx 2026-08-07) — reg through 2026-08-11 12:00 UTC+8; live PnL 2026-08-11 → 2026-08-25 — remote — deploy Trading ASP (agent); need ≥300 USDT stake; ranks 4–40 get $500 — fit if you ship trading agents; not a classic code-submit hack — okx.ai/hackathon · X

3. Arbitrum Open House Singapore (Buildathon phase) — apps open (org X 2026-08-06/07); 3-week online Buildathon from 2026-09-14; later invite-only IRL Founder House SG — $115k buildathon prizes/grants ($415k program total) — remote-first phase (Founder House = travel) — early-stage onchain fintech/product teams — openhouse.arbitrum.io · X — submission deadline for SG edition not published yet (fail-safe: treat apply as ASAP; no DEADLINES_JSON row)

Primary listings (no net-new high-signal vs known)

• Encode: Arc Programmable Money still live; final submit Sun 2026-08-09 AoE (org page) — known
• ETHGlobal upcoming: ETHOnline / Tokyo / Mumbai — known
• Devpost: XPRIZE Gemini / DataHub / Cockroach / Arm / CALL-E / RevenueCat — known; no new big-lab custom-subdomain challenge in window
• DoraHacks / Akindo: no clean NEW high-prize wave beyond known BUIDL CTC / 0G-class items
• Major-lab search: OpenAI Build Week already past submit (winners ~Aug 12); no new OpenAI/Anthropic/Google/xAI/Meta challenge open in last 24h

Tracked deadlines — re-verify (unchanged → not in JSON)