# Claude Build Day

- **When:** Sat, Jun 13 at 9:00 AM – 10:00 PM (PDT)
- **Where:** San Francisco, CA
- **Hosts:** [Anthropic](https://cerebralvalley.ai/u/anthropicai), [Cerebral Valley](https://cerebralvalley.ai/u/cv)
- **Format:** Hackathon
- **Registration:** Closed (the event has ended) — https://cerebralvalley.ai/e/claude-startups-build-day
- **Page:** https://cerebralvalley.ai/e/claude-startups-build-day

We believe powerful AI can compress decades of progress into years: in software engineering, in how people learn, in how companies run, and how the physical world gets built. But AI doesn't do any of that on its own. People do. Every important technology became important because someone picked it up early and aimed it at a problem that mattered. This day is for the people doing exactly that.

On **Saturday, June 13**, join us at Shack15 in San Francisco for one day of building. The broken process in your industry. The tool you wish existed. The idea you've been sitting on. The longer and more complex the task, the better. Build with **Opus 4.8** and Claude Code, with VCs and members of the Anthropic team in the room. We're awarding $150K in Claude credits across 3 finalists.  
  
**Judges include:**

- Pavla Bobosikova, Investor at Neo
- James Da Costa, Partner at a16z
- Zhen Li, Engineering Lead at Replit
- Mar Hershenson, GP at Pear VC
- Sara Deshpande, GP at Maven VC
- Alistair Smith, Member of Technical Staff at Anthropic
- Gagan Bhat, Member of Technical Staff at Anthropic
- Marius Buleandra, Member of Technical Staff at Anthropic
- Conner Phillippi, Member of Technical Staff at Anthropic
- Ciro Spaciari, Member of Technical Staff at Anthropic

**Let’s build.**

*Note: Space is limited. All attendees must apply and be approved — applications are reviewed on a rolling basis.*

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