Build Hour: Apps in ChatGPT
Build Hour: Apps in ChatGPT
Build a new generation of apps you can chat with right inside ChatGPT using Codex. In this Build Hour, we walkthrough how to design, build, and improve a realtime multi-player ChatGPT app from first setup to advanced UI patterns.
Corey Ching (Developer Experience) covers:
• How Apps in ChatGPT work and how to build them with Codex
• Using the Apps SDK, docs MCP server, and developer mode
• Improving an app with UI/UX guidelines
• Best practices & live Q&A
👉 OpenAI Apps SDK: https://developers.openai.com/apps-sdk
👉 What makes a great ChatGPT app: https://developers.openai.com/blog/what-makes-a-great-chatgpt-app/
👉 Follow along with the code repo: http://github.com/openai/build-hours
👉 Sign up for upcoming live Build Hours: https://webinar.openai.com/buildhours
00:00 Introduction
02:43 Apps Platform
04:07 Demo of Apps in ChatGPT
10:44 What is an App in ChatGPT
13:58 Building an App Process
16:58 Creating an App with Codex
26:57 Demo of Realtime Ping-Pong App
34:01 Best Practices: Iterating on your App
41:52 Q&A
Codex in JetBrains IDEs
Codex now works in JetBrains IDEs.
In this quick tour with Gleb Melnikov from JetBrains, we use Codex on a real Kotlin multi-platform project to:
🐞 Debug a broken iOS build from a stack trace
🌍 Implement Spanish localization end-to-end
🔄 Stay in-flow inside the IDE while the agent researches, edits, and verifies changes
Sign in with your ChatGPT subscription, an API key, or your JetBrains AI subscription to collaborate with Codex directly in your JetBrains IDE.
Chapters:
00:00 Codex is now available in JetBrains
00:53 Sign in options + codebase tour
01:48 Fixing an iOS build error with Codex
04:11 Adding Spanish localization
05:08 Access modes
07:18 Working in parallel + self-verifying with builds
09:21 Works across JetBrains IDEs + wrap-up
State of the AI Industry — the OpenAI Podcast Ep. 12
OpenAI CFO Sarah Friar and Khosla Ventures founder Vinod Khosla argue the greatest challenges in AI right now are keeping up with demand and making sure more people get the benefit. They unpack what's driving big investments in compute and why this moment is different from other technology cycles — with meaningful advances in health, agents, and robotics still ahead.
Chapters
00:00:00 — What’s the AI story of 2026?
00:07:28 — AI in healthcare
00:12:01 — Scaling compute to match revenue
00:18:05 — Difference between now and dot-com bubble
00:27:41 — Ads in ChatGPT
00:30:05 — Will consumers have more than one AI subscription?
00:36:41 — Winning in enterprise
00:39:44 — How can startups succeed?
00:44:05 — Robotics and beyond
ChatGPT Go is rolling out everywhere ChatGPT is available.
Starting today, ChatGPT Go is rolling out everywhere ChatGPT is available. In the US, Go is available for $8* per month.
ChatGPT Go is designed for people who want expanded access to our latest model, GPT‑5.2 Instant, at a lower price point—more messages, more uploads, and more image creation. With ChatGPT Go, you get:
10x more messages, file uploads and image creation than the free tier, so you can keep chatting with no limits on GPT‑5.2 Instant.
Longer memory and context window, so ChatGPT can remember more helpful details about you over time.
*US price displayed. Go pricing is localized in some markets.
Helping you choose the right insurance plan for you with ChatGPT
We’re introducing ChatGPT Health, a dedicated experience that securely brings your health information and ChatGPT’s intelligence together, to help you feel more informed, prepared, and confident navigating your health.
With Health, ChatGPT can help you understand recent test results, prepare for appointments with your doctor, get advice on how to approach your diet and workout routine, or understand the tradeoffs of different insurance options based on your healthcare patterns.
Join the waitlist: https://chatgpt.com/health/waitlist
Getting started with Codex
Get started with Codex, OpenAI’s coding agent, in this step-by-step onboarding walkthrough. You’ll learn how to install Codex, set up the CLI and VS Code extension, configure your workflow, and use Agents.md and prompting patterns to write, review, and reason across a real codebase.
This video covers:
Installing Codex (CLI + IDE)
Setting up a repo and getting your first runs working
Writing a great Agents.md (patterns + best practices)
Configuring Codex for your environment
Prompting patterns for more consistent results
Tips for using Codex in the CLI and IDE
Advanced workflows: headless mode + SDK
Start here
Sign up: https://openai.com/codex/
Codex overview + docs: https://developers.openai.com/codex
Codex Cookbook: https://cookbook.openai.com/topic/codex
Install + setup
VS Code extension: https://marketplace.visualstudio.com/items?itemName=openai.chatgpt
Agents.md standard: https://agents.md
Agents.md repo: https://github.com/agentsmd/agents.md
Prompting + workflows
Prompting guide: https://developers.openai.com/codex/prompting/
Exec plans (Agents.md patterns): https://cookbook.openai.com/articles/codex_exec_plans
Config reference: https://github.com/openai/codex/blob/main/docs/config.md#config-reference
Updates
Changelog: https://developers.openai.com/codex/changelog
Releases: https://github.com/openai/codex/releases
