OpenAI DevDay 2026 takes place on September 29, 2026, at Fort Mason in San Francisco. For people following from Brazil, the main confirmed detail is straightforward: the opening keynote will be livestreamed for free and will be open to everyone. The public schedule also says the keynote starts at 10:00 a.m. Pacific Time, featuring Sam Altman, which corresponds to 2:00 p.m. Brasília time on September 29.
The rest of the in-person event includes technical sessions, demos, workshops, and programming focused on OpenAI APIs and tools. However, the official page makes an important distinction: the keynote is the content announced for livestreaming; the other sessions will be recorded and posted on OpenAI's website shortly after the event. That helps avoid assuming that the full in-person agenda will air live.
How to watch the OpenAI DevDay 2026 keynote
The official way to follow remotely is through the keynote livestream. OpenAI provides a signup form on the DevDay 2026 page to receive a reminder before it starts. As of the page reviewed on September 1, there is no final public player link or dedicated video URL displayed there, so the safest route is to use the official event page and the livestream signup.
OpenAI also maintains a livestreams page listing broadcasts and replays. Close to the event, it can be a useful second place to check, but the DevDay-specific confirmation is the signup provided on the event website.
- Date: Tuesday, September 29, 2026.
- Keynote: 10:00 a.m. Pacific Time.
- Time in Brazil: 2:00 p.m. Brasília time.
- Remote access: free and open to everyone for the keynote.
- Other sessions: they will be recorded and posted later on OpenAI's website.
What is already confirmed about the program
The official page describes DevDay as a technical gathering for developers and hands-on builders. The confirmed scope includes technical sessions on APIs and tools, hands-on demos, workshops, and time with the teams building OpenAI products. This tells us what kind of content to expect without turning unannounced product launches into facts.
There is also a general schedule for the day in San Francisco:
| Activity | Pacific Time | Brasília time |
|---|---|---|
| In-person breakfast | 8:00 a.m. | 12:00 p.m. |
| Opening keynote, featuring Sam Altman | 10:00 a.m. | 2:00 p.m. |
| Breakouts and programming | 11:15 a.m.–3:30 p.m. | 3:15–7:30 p.m. |
| In-person lunch | 11:30 a.m. | 3:30 p.m. |
| Closing session | 4:00 p.m. | 8:00 p.m. |
| In-person reception | 4:45–7:00 p.m. | 8:45–11:00 p.m. |
These times help explain the flow of the event, but they do not mean every activity will be livestreamed. At this stage, OpenAI confirms a livestream only for the keynote.
APIs, tools, and sessions: what is confirmed and what is still expectation
It is accurate to say DevDay 2026 will include technical content about APIs and tools, because that wording appears explicitly on the official page. Demos and workshops are also confirmed. What should not yet be presented as fact is a list of specific APIs, new models, products, versions, or features that might be announced on September 29.
As of September 1, the public DevDay page does not show a detailed agenda with every session title, a full speaker list, or a list of product announcements. Predictions about a new model, price changes, SDK versions, API limits, or ChatGPT features therefore remain speculation until OpenAI publishes the agenda or makes the announcements during the event.
What to watch before September 29
For developers using DevDay as a planning reference, the most useful preparation is to follow official changes rather than guess the launches. A simple checklist reduces the chance of missing a last-minute update:
- Sign up for the livestream reminder on the official event page.
- Review the DevDay page during event week to see whether a detailed agenda has been published.
- Check the time again on September 29; the keynote is scheduled for 2:00 p.m. Brasília time.
- Open the official event page early and, if useful, OpenAI's livestreams page.
- Keep the documentation pages for the products you use handy so you can compare any announced changes quickly.
How to follow sessions that are not live
OpenAI's official guidance is that the other sessions will be recorded and posted on openai.com shortly after the event. For people who do not need to follow everything in real time, those recordings can be more useful than fragmented social-media reports because they preserve demos, technical context, and presenter caveats.
After DevDay, look first for official replays and then for the documentation and product posts tied to each announcement. A stage presentation may introduce a feature, but documentation is typically where requirements, availability, integration examples, and technical limitations are spelled out.
What to update after the keynote
This is a topic that changes on the day of the event itself. After the keynote, the items worth updating are the replay link, announcements that actually happened, names and availability of new APIs or tools, official documentation, access dates, and any pricing or limits. Before then, any definitive list of “DevDay 2026 launches” would be premature.
In short
What you can safely plan now is the OpenAI DevDay 2026 keynote on September 29 at 2:00 p.m. Brasília time. The stream will be free and open to everyone, while the other sessions will be recorded for later publication. OpenAI confirms technical content on APIs and tools, plus demos and workshops, but it has not yet published a complete session or product-announcement list. To separate confirmed information from rumor, use the official DevDay 2026 page as the primary reference.
