#2NaN Hackathon
Decide with Clef
- The agent wants to run rm -rf / in production. Allow it? Blocked
- “Write a haiku about cats.” Which model answers? qwen3.8-flash
- A carbonara made with cream. Is it carbonara? Not a carbonara
- Ticket: “I can't log in and the demo is in an hour.” Urgency? High urgency
- The defender handles the ball inside the box. Penalty? Penalty
- “Refactor this 40-file repo.” Which model answers? glm5.3
- Comment: “Great talk, thanks for sharing!” Publish it? Publish
- The agent wants to email all 3,000 contacts. Allow it? Ask first
Dates: November 13 · 14 · 15, 2026
New on NaN
Clef lands on NaN
Cloudflare's decision model joins the NaN models.
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Yes or no
The probability that the answer is yes.
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Choose
One option out of the ones you define, with its confidence.
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Score
A grade against the rubric you give it.
~200 ms median64K contextup to 4 imagesopen weights, Apache 2.0
Figures from Cloudflare.
When?
Friday 13, Saturday 14 and Sunday 15 November 2026
From Friday at 17:00 to Sunday at 17:00 (Madrid time)
Where?
Discord
Solo or in a team?
3
Teams of 3 people at most
Teams are formed automatically. If you want to team up with your friends, message us on Discord once you have signed up.
What's the goal?
Build an app where Clef makes the call.
Model router
Let Clef pick which NaN model answers each request: a fast one for simple things, a large one for hard ones.
Agent guardrails
Let Clef decide whether an agent may run an action before it does.
Fact Check
An app that says whether a claim is true or false.
Open theme
Any other app where Clef decides. Surprise us.
