OpenAI DevDay 2026 sessions: every breakout talk by stage
- The agenda shown after the keynote listed 18 breakout sessions across four stages at Fort Mason, San Francisco.
- Themes: long-running coding agents, Codex beyond the laptop, the Agents API, ChatGPT plugins and agent architectures.
- OpenAI says session recordings will be posted on openai.com shortly after the event.
DevDay 2026 took place on September 29 at Fort Mason in San Francisco. Breakouts ran from 11:15 a.m. to 3:30 p.m. Pacific, followed by a closing session at 4:00 p.m. The keynote was livestreamed; other sessions are being recorded. Below are the sessions shown on the main-stage agenda slide, grouped by stage. Descriptions come from the pre-event agenda where available; for other talks we link the matching announcement.
Festival Pavilion
- Claw Labs: Building Open Source Together — Peter Steinberger on how agents can change the way open-source teams build.
- Codex Game Studio — what makes a game easy for humans but hard for AI? Attendees build one and put Codex to the test.
- Build What's Next on the ChatGPT Platform with Plugins — related: plugin extensions, better plugin discovery and MCP events.
- Closing Q&A
Cowell Theater
- What Will You Build With Coding Agents That Don't Quit? — lessons from an internal Codex run that spent more than 1,000 hours keeping builds and tests passing in a large shared codebase, using goals, subagents and persistent plans.
- Harness-as-a-Service: Building with the Agents API — related: the Agents API now supports computer use, multi-agent orchestration, tool search and context compaction.
- Sites and the Next Generation of Web Apps — related: Sites can now host ChatGPT plugins.
- Codex Has Left the Laptop — moving from delegating single tasks to letting Codex take on whole goals, wherever you work. Related: Codex in the cloud.
- From Single Player to Multiplayer with Codex — follows a 2 a.m. outage from the first Slack messages to a reviewed fix and a team update.
Mezzanine Stage
- What Comes After Loops? A Deep Dive Into Agentic Architectures — how agent design is moving from simple loops to collaborating agents, and what comes next.
- How OpenAI Puts ChatGPT to Work — related: dots, ChatGPT Space, Pages and team tasks.
- Codex Security: From Vulnerability to Verified Fix — related: Codex Security Cloud.
- How We Make Our Models Useful
- Building with GPT-Live and Image Generation
Outdoor Stage
- Stack Overflow — From Idea to Product
- Stop Overpaying for Intelligence — related: GPT-6.1 Sol at a fifth of Astra's token prices.
- Higgsfield — Building Agents That Provision Their Own Compute
- Qodo — The Last Human Code Review — related: Code Review and automatic cloud reviews in Codex.
What the sessions mean for dots
Several talks map directly onto how dots work. Long-running agents with goals, subagents and persistent plans are the pattern behind a dot that keeps projects moving for days. The plugins session covers how developers can reach dots, which connect to apps through ChatGPT plugins. And "How OpenAI Puts ChatGPT to Work" covers the internal use OpenAI describes in its dots launch, such as dots investigating bugs reported in Slack.
Watch the recordings
OpenAI says sessions other than the keynote will be recorded and posted on openai.com shortly after the event. We will link each recording here once it is published.