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Codex x ElevenLabs Buildathon - Ho Chi Minh City

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ElevenLabsBuildStuffssixonefourlabs
About this event

What to expect

Build an AI tool with Codex and explore lower-cost GPT-5.6 workflows at this hands-on buildathon in Ho Chi Minh City on 19 August 2026.

Hosted by Codex Meetups Vietnam in collaboration with ElevenLabs, BuildStuffs, and sixonefourlabs, this practical evening is designed to help Vietnamese developers, founders, and startups build more, spend less, and ship faster. Rather than stopping at talks, attendees will work in small groups to turn an idea into a tool, workflow, visualisation, or site.

What you’ll explore

The event focuses on OpenAI’s new GPT-5.6 pricing and three-model strategy. Organisers will explain how Luna is now 80% cheaper, Terra is 20% cheaper, and Sol Fast can run up to 2.5× faster,and, more importantly, what those changes unlock for real products and startup budgets.

The live build will explicitly demonstrate how to choose between models:

  • Sol for planning and difficult judgement
  • Terra for everyday implementation
  • Luna for repetitive or high-volume work
  • Codex for inspecting, building, testing, and refining the result

You can also expect live Codex demonstrations, practical startup workflows, and ideas for reducing AI costs without sacrificing quality. The opening update will cover GPT-5.6, lower pricing, ChatGPT Work, Voice, and Sites.

Evening format

  • 6:00–6:15pm: Arrival and networking
  • 6:15–6:30pm: What changed in the last 30 days
  • 6:30–8:30pm: Small-group build-together sprint
  • 8:30–10:00pm: Two-minute community demos

A few venture capital investors have been invited to attend the demos, giving teams an additional opportunity to show what they have created. Community sharing, networking, and conversations with local builders run throughout the evening.

Who should attend?

The buildathon welcomes both first-time AI builders and people scaling production applications. Beginners can pair with more experienced participants, while established developers and founders can test model-routing and cost-optimisation ideas against a concrete use case. Bring your laptop and an idea you would genuinely like to build; the goal is to leave with practical workflows you can apply immediately.…

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