Sea x OpenAI Codex Hackathon in Singapore: What Developers Need to Know

The Sea x OpenAI Codex Hackathon is a one‑day developer event taking place in Singapore on June 6, 2026, organized by technology company Sea in partnership with OpenAI. The event serves as the launch of a regional Codex hackathon series across the Asia‑Pacific (APAC) region, designed to bring builders together to create real AI‑powered applications using OpenAI’s coding tools.

The initiative reflects a broader push to accelerate applied AI development in Asia by giving engineers, startups, and technical builders hands‑on access to modern AI development tools and a collaborative environment to prototype new ideas.

A regional Codex hackathon series begins in Singapore

The Singapore event is the first stop in a regional APAC hackathon series jointly launched by Sea and OpenAI.

Reports describe it as OpenAI’s first regional hackathon partnership in Asia‑Pacific, aimed at encouraging practical experimentation with frontier AI systems such as coding agents powered by Codex.

The hackathon itself is designed as a fast‑paced, one‑day build sprint, where teams work intensively to develop working AI prototypes rather than simply pitching ideas.

Organizers say the goal is to create a platform where ambitious builders can move quickly from concept to functioning product using modern AI developer tools.

Who can participate

The hackathon is primarily aimed at technical builders across the Asia‑Pacific region, including:

• AI developers and software engineers
• Students and technical researchers
• Startup teams
• Independent builders and technology creators

The event is expected to bring together developer teams from across APAC, with reporting indicating the competition will be limited to around 40 teams to keep the event focused on hands‑on building and collaboration.

Rather than being a beginner workshop, the event targets participants who can quickly prototype functional software and experiment with advanced AI capabilities.

What participants will build with OpenAI Codex

Because the event centers on OpenAI Codex, participants are expected to build projects that use AI coding systems or agents to create working applications.

Typical project ideas may include:

• AI developer tools that automate coding tasks
• agent‑based systems that write, test, or deploy software
• productivity or workflow tools powered by AI
• AI‑native applications that integrate code generation directly into user experiences

Organizers emphasize real‑world AI innovation rather than theoretical research, encouraging teams to build applications that demonstrate how coding agents and AI systems can solve practical problems.

Prizes, tools, and developer support

Exact prize amounts for the Singapore hackathon have not been publicly detailed in available reporting. However, OpenAI’s hackathon support model typically includes several types of resources for participating teams.

These may include:

• Access to Codex or related AI development tools
• OpenAI API credits for building and testing applications
• Prizes for top projects
• developer resources, workshops, and starter materials
• mentoring or judging support from experienced builders

Support packages vary by event, but the goal is to ensure teams have the tools needed to ship working AI prototypes during the hackathon.

Why this hackathon matters for the APAC AI ecosystem

Beyond the single event in Singapore, the initiative is intended to strengthen the AI developer ecosystem across Asia‑Pacific.

Organizers describe the hackathon series as a way to:

• connect developers across the region
• encourage experimentation with frontier AI tools
• help builders turn ideas into working products
• foster collaboration between startups, students, and engineering communities

By combining regional developer communities with access to advanced AI tooling, the series aims to accelerate practical AI innovation and help grow a network of builders working on real applications in APAC.

The bigger picture

Hackathons have become a key mechanism for developing AI ecosystems: they concentrate tools, mentorship, and builder talent into short timeframes where new prototypes can emerge quickly.

The Sea x OpenAI Codex Hackathon represents a coordinated attempt to bring that model to the Asia‑Pacific region at scale. By launching the series in Singapore and expanding regionally, the organizers hope to cultivate a new generation of AI builders capable of turning advanced models and coding agents into real‑world software products.

While many details—such as specific prize structures or judging criteria—have not been fully disclosed, the initiative signals growing momentum behind developer‑driven AI innovation across APAC.