Fortune reported on September 25 that OpenAI is preparing to preview GPT-6 Cyber, a security-focused model, alongside a separate product to deploy it more safely. OpenAI has not confirmed the model, pricing, or general availability (Fortune via tbreak.com, September 2026).
Expect App SDK updates that build on the "apps inside ChatGPT" launch from DevDay 2025. OpenAI tends to ship developer-tools one day and SDKs the next.
How to prepare: steps developers and enterprise teams should take now
Use the four working days between now and the keynote to clear a baseline, not to lock in choices. DevDay 2026 is a developer day, not a consumer product day, so production work should not move on announcements without benchmark verification.
- Capture current GPT-6 Sol and GPT-6 Luna benchmark runs as a baseline before any new release.
- Audit ChatGPT Voice integrations against the new GPT-Live rollout; the rollout may not hit every workspace on day one.
- Identify GPT-6 Cyber use cases if your team builds security tooling. The preview, if it ships, will not have public pricing yet.
- Treat any leaked tier or pricing (such as the rumoured $500 Pro Max) as unconfirmed until Sam Altman says it on stage.
The recording of the keynote and the breakout sessions will post to openai.com in the days after the event, so teams outside Pacific time do not need to block the morning to stay informed (openai.com, September 2026).
What DevDay 2025 launched, and how DevDay 2026 will likely differ
DevDay 2025 introduced "apps inside ChatGPT" and dev tooling that became the SDK focus of the year. DevDay 2026 lands with a different baseline: OpenAI's API tiers, voice products, and safety work all already changed in September 2026 ahead of the event.
DevDay 2024 shipped GPT-4o voice, real-time vision, and the Apps SDK. DevDay 2025 added agent primitives. DevDay 2026 is more likely to ship more limited previews, given the heavier regulatory backdrop in the U.S. and EU (OpenAI, 2025 and 2026).
If GPT-6 Cyber ships as preview, expect a security-eval ramp that mirrors the model spec release schedule for other previews: Day 1 model card and pricing, Day 7 first eval results, Day 30 GA decision (Fortune via tbreak.com, September 2026).
FAQ
Six short answers on OpenAI DevDay 2026.
What date is OpenAI DevDay 2026?
DevDay 2026 runs on Tuesday, September 29, 2026 in San Francisco at Fort Mason Center. The opening keynote at 10 a.m. Pacific is livestreamed for free (openai.com, September 2026).
Where is OpenAI DevDay 2026 held?
Fort Mason Center in San Francisco. In-person applications closed on July 10, 2026 and registration cost was $650 per attendee (OpenAI Developer Community, September 2026).
Can I watch the OpenAI DevDay 2026 keynote online?
Yes. The opening keynote is livestreamed free on September 29, 2026 at 10 a.m. Pacific. Other sessions will be recorded and posted to openai.com shortly after the event (openai.com, September 2026).
Is OpenAI DevDay 2026 in-person registration still open?
No. Applications closed July 10, 2026; acceptances were sent by late July. Accepted attendees had 14 days to register before their spot rolled to the waitlist (OpenAI Developer Community, September 2026).
What time is Sam Altman's DevDay 2026 keynote?
10 a.m. Pacific on Tuesday, September 29. The schedule lists breakfast at 8 a.m., breakouts from 11:15 a.m. to 3:30 p.m., the closing session at 4 p.m., and a reception from 4:45 to 7 p.m. (openai.com, September 2026).
What is GPT-6 Cyber, and will it be at DevDay 2026?
Fortune reported on September 25 that OpenAI may preview a cybersecurity-focused GPT-6 Cyber model at DevDay, alongside an unnamed product for secure deployments. OpenAI has not confirmed the model, capabilities, or pricing (Fortune via tbreak.com, September 2026).
How much did in-person DevDay 2026 cost?
Registration was $650 per attendee. Attendees were also responsible for their own travel and lodging to San Francisco (OpenAI Developer Community, September 2026).
Will DevDay 2026 announce a new ChatGPT tier?
OpenAI has not confirmed any new public ChatGPT tier. Reports from September 24 to 25 reference a possible $500 a month ChatGPT Pro Max tier leaked by TestingCatalog and Tibor Blaho; nothing is announced yet (Startup Fortune, September 2026).
Verify the latest OpenAI DevDay 2026 updates on devday.openai.com and openai.com before planning travel or production changes. This post is dated and may age within hours.
Fazlur Rahman
