# GLM-5.3 Flash Lightning Hackathon - **When:** Aug 28 at 10:00 AM – Sep 1 at 12:00 AM (PDT) - **Where:** Online - **Hosts:** [Cerebral Valley](https://cerebralvalley.ai/u/events) - **Format:** Hackathon (submissions due Sep 1, 2026 UTC) - **Registration:** Open β€” https://cerebralvalley.ai/e/glm-5-3-flash-lightning-hackathon - **Page:** https://cerebralvalley.ai/e/glm-5-3-flash-lightning-hackathon **Frontier intelligence. Flash cost. What will you build?** **GLM-5.3 Flash** brings frontier-level coding, agentic, and multimodal capabilities at a fraction of the cost. You have **four days** to build something that pushes it to the limit. **Compete for $5,000 in cash prizes across two tracks:** πŸ† **Frontier Build: **Build the most impressive, technically ambitious, or unexpected project with GLM-5.3 Flash. **Push the model into new territory.** πŸ”₯ **Most Viral: **Build something people can’t stop talking about. Share your project on X and compete for the most social traction. **Reach, shares, likes, comments, and overall engagement all count.** You can compete in both tracks with the same project, or target just one. **Show us what GLM-5.3 Flash can actually do.** **Register for the challenge** and submit your project through the submission form here: [https://cerebralvalley.ai/e/glm-5-3-flash-lightning-hackathon/hackathon/submit](https://cerebralvalley.ai/e/glm-5-3-flash-lightning-hackathon/hackathon/submit) Winners will be announced on **September 2** through our community channels. *This is an independent community challenge organized by Cerebral Valley and is not officially sponsored, endorsed, or administered by **[Z.ai](http://Z.ai)**.* --- Markdown version of https://cerebralvalley.ai/e/glm-5-3-flash-lightning-hackathon. Site index for agents: https://cerebralvalley.ai/llms.txt Β· full text: https://cerebralvalley.ai/llms-full.txt