New model. Two cities. Real builds.

When Fable 5.1 landed, Claude communities around the world ran Build Days between 11 and 25 September. Hands on keyboards, no long talks. Australia ran two of them on back-to-back nights: Brisbane on Wednesday 16 September and Sydney on Thursday 17 September.

Claude Community Brisbane, Build Day, Fable 5.1
Dominik Fretz on stage at the Sydney Build Day at MongoDB
The deal
US$100

in Claude API credits for every attendee, to build on the day and keep going after. Build solo or in a small team, demo it, and the judges pick the winners.

The brief: build one of three things.

The same three categories ran at every Build Day.

Delight

Something surprising, beautiful or fun that you couldn't have made this good, this fast, before.

Breakthrough

Something the previous model couldn't handle. See how far the new one gets.

Everyday

Something that solves a real problem in your life.

What to expect

Less watching, more building.

Never been to one? Here's how it feels on the night. Beginners and seasoned builders both belong in the room.

1

Demos first

The night opens with the new model on screen, shown by people who know it. You see what it can do before you try it.

2

Hands on keyboards

Most of the time is build time. No long talks, no slides to sit through. Just you, the model and a problem.

3

Help on the floor

Mentors walk the room. Wayne Hoggett from Pluralsight in Brisbane, Dominik Fretz in Sydney. Stuck is fine, staying stuck isn't.

4

Build with people

Come solo and join a team, or bring your own. Plenty of people meet their next collaborator at one of these.

5

Show what you made

Everyone who builds gets to demo. The judges pick the winners, and the room gets to see what's possible.

6

Celebrate it

A new model is a big moment. We mark it together, with good food, good people and a lot of happy noise.

How each night ran.

Wednesday 16 September 2026

Brisbane

Where27/10 Eagle Street, Brisbane City
Run of night5:30 pm Fable 5.1 demos from Anthropic, then 6:00 to 8:00 pm build time
JudgesRobert Li (Director of AI, Australia Go to Market), Sam Marshall (Principal Forward Deployed Engineer, V2 AI), Lucas Ridley (UpperGround by Hudson)
On the floorWayne Hoggett from Pluralsight, helping with builds
Who forDevelopers and builders using Claude Code, the API, or building agents
Thursday 17 September 2026

Sydney

WhereMongoDB's Sydney office
Run of night5:30 to 8:30 pm AEST. Demos on the big screen, build time, then show and tell
Hosted byDominik Fretz, Claude Ambassador, Sydney
On screenBuilds like Talk to your database (MongoDB aggregation pipelines from plain English) and Payment Finder (one sentence in, the government payments that apply out, with a source on every claim)
ThanksMongoDB, for the room and the pizza
MelbourneSet for Thursday 24 September and called off the day before. Melbourne gets first dibs on the next one.
Sydney · MongoDB · 17 September

A night at MongoDB.

A packed room, a lot of pizza and three hours of building. Here's how it looked.

A packed room at MongoDB's Sydney office
A full house
Dominik Fretz on stage in front of the Claude Sydney banner
The pizza table
Dominik helping a builder at their laptop
Two builders pairing at a laptop
A Talk to your database demo on the big screen
Talk to your database
Builders heads down on laptops
A table of builders working together
The Payment Finder demo on screen
Payment Finder
A builder presenting their build
Showcase time at the end of the night
The Sydney Build Day crew together at MongoDB
That's a wrap, Sydney.The crew at MongoDB, Thursday 17 September 2026

What to bring.

Your laptopA power leadClaude Code installed before you arriveA console.anthropic.com account for your creditsA problem or an idea (or just turn up)

What got built.

The top three from each city, with a link to try them.

Brisbane · First[WINNING BUILD]
Brisbane · Second[WINNING BUILD]
Brisbane · Third[WINNING BUILD]
Sydney · First[WINNING BUILD]
Sydney · Second[WINNING BUILD]
Sydney · Third[WINNING BUILD]

The next Build Day lands with the next model.

Register interest and you'll hear first, with time to grab a spot before they go.