Harness-as-a-Service: Building with the Agents API | DevDay 2026 // TRAIN BRAIN

Harness-as-a-Service: Building with the Agents API | DevDay 2026

Build with the Codex harness through the Agents API. Learn how to run agents in your environment, keep long-running tasks going, and understand which infrastructure OpenAI manages.

OpenAI

OpenAI’s mission is to ensure that artificial general intelligence benefits all of humanity. ...

Cyber at the Frontier

Building with GPT-Live and Image Generation | DevDay 2026

Build What’s Next on the ChatGPT Platform with Plugins | DevDay 2026

Sites and the Next Generation of Web Apps | DevDay 2026

What Will You Build With Coding Agents That Don’t Quit? | DevDay 2026

Harness-as-a-Service: Building with the Agents API | DevDay 2026

Codex Security: From Vulnerability to Verified Fix | DevDay 2026

What Comes After Loops?: Deep Dive Into Agentic Architecture | DevDay 2026

Answering your questions about GPT-Live

Greg Brockman on how OpenAI uses frontier models for cyber defense

Greg Brockman on how OpenAI uses frontier models for cyber defense

How Mozilla strengthens Firefox security with GPT-6 Cyber

How Figma Is Building Self-Serve Analytics with OpenAI

How Figma Is Building Self-Serve Analytics with OpenAI

Qodo brings company context into Codex code review

ChatGPT Voice is now in Finances

Glean on privacy and OpenAI Private Intelligence

Coinbase on OpenAI Private Intelligence

There are many futures. Which do you want to build?

How Gen uses ChatGPT Work to turn data Into decisions | OpenAI

How Gen uses ChatGPT Work to turn data Into decisions | OpenAI

ChatGPT Enterprise at Zendesk: Putting Company Data to Work

ChatGPT Enterprise at Zendesk: Putting Company Data to Work

Why Merge CEO Shensi Ding stays hands-on with Codex

Lawyers Stay in Control | AT&T + OpenAI

Getting a Head Start with Codex | Mitchell Hashimoto

From Ideas to Prototypes with Codex | Shopify’s Mikhail Parakhin

How Sotira Gives Unsold Inventory a Second Life with Codex

AI for Detection and Response | Cloudflare’s Mark Anderson

Better Sources, Better Presentations | Hebbia on Astra

Moving IPO Work Forward with AI | Cooley + OpenAI

How Sullivan & Cromwell builds legal tools with Codex | OpenAI

Hebbia on Astra: Better research, better presentations | OpenAI

How Shield uses OpenAI’s Astra to support IT teams

From analyst to builder with Codex | Benefit Street Partners

How Benefit Street Partners is building financial analysis tools with Codex

You need a better headshot.

Cooking with Codex: Ep. 1

Thomson Reuters on Building Trust in Legal AI | OpenAI

Thomson Reuters on Building Trust in Legal AI | OpenAI

Build more personal sites with Codex

Weeks to Hours: SentinelOne on Cybersecurity Research with OpenAI

Weeks to Hours: SentinelOne on Cybersecurity Research with OpenAI

Cooking up a catering business with ChatGPT

Block on Finding and Fixing Security Risks with OpenAI

Block on Finding and Fixing Security Risks with OpenAI

Production Monitoring with Codex: Grafana, Kubernetes, & Security

How Oracle Uses ChatGPT Work to Transform Recruitment

Introducing GPT-6 in ChatGPT with Intelligent UI

Stack Overflow - From Idea to Product | DevDay 2026

Higgsfield - Building Agents That Provision Their Own Compute | DevDay 2026

R&D Part 2

Introducing the Decisions API

Building a custom website to stay on top of business with ChatGPT

The dots demo, take two | OpenAI DevDay 2026

Introducing dots, always-on agents built to handle everything.

The Defender's Window at enterprise scale with Standard Chartered

Building the partner ecosystem with Sophos

GPT-6 Astra in practice: Turning ideas into projects

Jump Trading points GPT-6 Astra to its most ambiguous, difficult tasks

Reimagining IT with ChatGPT

Meet ChatGPT: Ask Your First Question | OpenAI Academy

How to Ask ChatGPT Better Questions | OpenAI Academy

Use ChatGPT to Organize Everyday Tasks | OpenAI Academy

How to Spot Scam Messages with ChatGPT | OpenAI Academy

ChatGPT Privacy: What Not to Share and When to Double-Check | OpenAI Academy

Create a Coloring Page with ChatGPT | OpenAI Academy

Assess Usage and Value of ChatGPT Work

Detecting wildfires with ChatGPT

How Fyxer built an AI executive assistant people trust

GPT-6 Astra needs less babysitting

GPT-6 Astra added unexpected details

GPT-Live-1 is now in the API

GPT-6 Astra handles the editing busywork

GPT-6 Astra built a font playground

Introducing the Agents API

In Harmony

Two blind brothers using ChatGPT to navigate life and run their nonprofit

Helping a small business go big with ChatGPT

Discovering new antibiotics with ChatGPT