
Hacktoberfest Hack Day Toronto x Hack the 6ix
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🚨 Update: We have officially reached full capacity! Thank you so much for the incredible support. If you missed regular registration, please join our waitlist—we’ll release spots on a rolling basis if spaces open up.
Celebrate spooky season and open source with Hack the 6ix and Major League Hacking! 🎃💻
Join us for a cozy, Halloween-themed Hacktoberfest Hack Day in Downtown Toronto. Whether you’re making your very first pull request or you’re a seasoned contributor, this in-person event is designed to be a welcoming, relaxed environment to collaborate on open-source projects, learn new skills, and connect with the local builder community.
We’ll have the room fully decked out in Halloween decorations, along with fun seasonal activities to take a break from hacking and get into the holiday spirit!
Prize Categories
2 categories- View Best Use of Gemma 4DDeepmind Google
Best Use of Gemma 4
It’s time to see how much you can build with a lightweight, open model. Gemma 4 packs multimodal intelligence into an open-weights model that you can access through the Gemini API. So, what can Gemma 4 bring to your project?
- Multimodal Experience: Work with text and images to create an assistant that understands more of what users share.
- Focused AI Tools: Build a focused AI tool for learning, creativity, productivity, or your community.
- Rapid Prototyping: Experiment with an open model while using the Gemini API to move quickly from an idea to a working prototype.
Bring your idea to life… what will you build with Gemma 4 today?
Build with Gemma 4View category - View Best Open-Source AI Project

Best Open-Source AI Project
Exclusive Hacktoberfest 2026 Winner DEV Badge & MLH Swag Bag
Build an original project that uses open-source or open-weight AI as an important part of how it works. Teams could create an agent skill, build with an open-weight large or small language model, or build or adapt an open-source model harness. These are examples within one challenge, and teams may combine them.
Open-source or open-weight AI must be an important part of the project.
The project must be published in a public GitHub repository and use an open-source license.
An agent skill must comply with the Agent Skill Open Standard.
A model-harness entry must include an original implementation or meaningful changes to an existing open-source harness.
Build with DigitalOceanView category