OpenAI DevDay 2026: Dots, GPT-6.1 Sol, Codex announcements
Dots as always-on agents, GPT-6.1 Sol at a fifth of Astra's input price, Codex fully in the cloud - plus a live blog full of demo stumbles.
In short
At DevDay 2026 on September 29, 2026, OpenAI's news came down to three things: Dots as always-on agents, the much cheaper GPT-6.1 Sol model, and a Codex that now runs entirely in the cloud.
At a glance
- GPT-6.1 Sol: $2.00 input against $10.00 for GPT-6 Astra; cached input $0.10 against $1.00.
- Ultrafast: 8x faster at roughly 300 tokens per second for 6x the standard price, on Astra and Sol.
- Dots run continuously and plug into Slack, Teams and email; ChatGPT Pro and Enterprise had access on the day.
- Codex Security Cloud scans automatically and deduplicates findings; the security CLI ships as open source.
- OpenAI says agents finished 35 percent of 8-to-16-hour tasks with zero interventions in July, up from 10 percent in January 2026.
OpenAI's DevDay 2026 on September 29, 2026 came down to three things for builders: Dots, agents that keep running; GPT-6.1 Sol, a far cheaper model; and Codex, now hosted entirely in the cloud.
The price line first
Sol is listed at $2.00 for input against $10.00 for GPT-6 Astra, and $0.10 against $1.00 for cached input. The live blog does not spell out the billing unit; per-million-token pricing is the usual convention, but we are not stating it as confirmed.
Speed is sold separately. Ultrafast runs 8x faster at roughly 300 tokens per second for 6x the standard price, on both Astra and Sol. The new Decisions API returns answers in under a second when the candidate answers are fixed in advance.
Dots and ChatGPT Space
A Dot is a personal agent built on Astra. You name it, it gets a blob avatar, and it connects to Slack, Teams, email and other work tools. ChatGPT Pro and Enterprise customers had access on the day of the keynote.
ChatGPT Space is the shared surface around it: Notion-style documents where a team writes next to its Dots, with scheduled tasks, SQLite databases and plugins that pull in your own data.
Codex, security scanning and Computer Use
Codex is now fully cloud-hosted. Codex Security Cloud scans automatically and deduplicates findings, and OpenAI is shipping a security CLI as open source. Computer Use moves into the Agents API with a 2x latency win.
Platform, marketplace, plans
Sign in with ChatGPT lets apps authenticate against tokens users already hold, and plugin extensions are pitched as whole applications rather than side panels. The OpenAI Marketplace opens with seven partners: Adobe, Canva, Figma, Notion, Salesforce, Vercel and Zendesk.
On subscriptions, Pro 500 offers 25x the usage of Plus along with Ultrafast, and the $200 per month tier is open to new subscribers again.
One number on agent reliability
On stage, Tejal Patwardhan put a figure on the progress: in July, agents finished 35 percent of tasks running 8 to 16 hours with zero interventions, compared with 10 percent in January 2026. That is a vendor self-report, not an independent benchmark.
What went wrong during the demos
Simon Willison's live blog logged the friction as it happened: Dots needed desktop access even though it was pitched as mobile, voice mode broke during live demos, and Codex Cloud disappointed him just hours before the keynote. He read the question-and-answer session as flat, with low-ball questions.
Sam Altman's line that the coming capabilities would be "unimaginable if we can get alignment right" sat awkwardly beside that demo record, in Willison's account.
What we could not verify
Only one of the three sources permitted for this piece opened for us: the live blog. OpenAI's own recap page answered HTTP 403 and The Verge roundup was unreachable.
Every figure above therefore traces to the live blog. The recap page's own summary promises more than 20 announcements; we could not check that against the page itself, so we are not presenting this as the complete list.
FAQ
What is OpenAI Dots?
A personal agent built on the Astra model. You give it a name and a blob avatar, and it connects to Slack, Teams, email and other work tools. ChatGPT Pro and Enterprise customers got access on the day of the keynote.
How much cheaper is GPT-6.1 Sol than GPT-6 Astra?
Per the live blog, $2.00 input against $10.00 for Astra, and $0.10 against $1.00 for cached input. The live blog does not name the billing unit explicitly.
What changed for Codex at DevDay 2026?
Codex moved fully into the cloud, gained Codex Security Cloud with automatic scanning and deduplication, and an open-source security CLI; Computer Use moved into the Agents API with a 2x latency win.
