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3 Days of AI Meetups in Berlin & Wrocław (OpenAI Codex + Vercel AI SDK Vlog)

Apr 8, 2026· 12 min· 305 views·Watch on YouTube

An unnamed Callstack host and Codex ambassador shares a behind-the-scenes look at three AI meetups in Berlin and Wrocław, organized with OpenAI and Vercel.

Three meetups across two cities

The host travels to Berlin for a Codex meetup organized with OpenAI, then plans two more events in Wrocław. They say they have been bringing tech communities together for about 10 years and invite viewers to suggest another city.

A packed Berlin Codex meetup

The Berlin event is the second meetup there, with custom badges and a coworking venue that holds up to 100 people. Around 200 people signed up in one day. The three-hour agenda includes an OpenAI presentation, community demos, and networking, with attendees from across software, including graphic designers.

Vercel AI SDK in Wrocław

The Wednesday meetup focuses on Vercel's AI SDK and libraries for building AI applications. The host gives a tour of the Callstack office as the team prepares for about 85 attendees. After presentations and audience questions, the host thanks the speakers and attendees.

A busy final meetup and project work

On Thursday, a speaker is sick, so Piotr steps in to demo. The host says the team has been working on three hackathon projects, including Eval for React Native, and has been rewriting another project from scratch. The day also includes a meetup outside Callstack's usual React and React Native focus.

Wrapping up and sharing future plans

The host says the team shipped a new project during the busy stretch and invites viewers to say if they want more behind-the-scenes coverage of planning, agent work, and releases. They point people to Luma or Twitter for future event announcements and invite them to propose topics.

Takeaways

  • A clear agenda with a short presentation, community demos, and networking can make a meetup easy to follow.
  • Track sign-ups against venue capacity: Berlin drew about 200 registrations for a room that holds 100.
  • Prepare a backup speaker or demo plan in case someone gets sick.
  • Events can bring in people beyond a company's usual technical community, including designers.
  • Show behind-the-scenes project work when audiences ask for it, and use their feedback to guide future coverage.

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3 Days of AI Meetups in Berlin & Wrocław (OpenAI Codex + Vercel AI SDK Vlog) · WhoBuilt