OpenAI held DevDay on September 29, 2026. The headline was Dots, but the wider theme was ChatGPT turning into a place where people, agents, and third-party software work in the same window. This page lists what was announced, sorted by who it affects, and then pulls out the parts that matter for brand visibility.
Announcement Summary
| Announcement | What it is | Availability |
|---|---|---|
| Dots | Always-on personal agents with their own cloud computer and browser, connected to 4,000+ apps | Pro and Business Premium. Beta for Enterprise, Edu, Healthcare |
| GPT-6.1 Sol | Mid-tier model at $2 input and $10 output per million tokens, one fifth of GPT-6 Astra | API, and ChatGPT Plus and above. Not Free or Go |
| GPT-6.1 Astra | Not released. Press reports say OpenAI held it back after it missed an internal safety bar | None |
| Ultrafast | A speed tier. GPT-6 Astra Ultrafast reaches up to about 300 tokens per second | API, and Pro 500 and Enterprise in ChatGPT and Codex |
| Pro 500 | A $500 per month personal plan with the largest allowance and Ultrafast included | ChatGPT |
| Space, Pages, Tasks | A shared workspace for people and dots, a document format for joint work, and scheduled or triggered team tasks | Pro, Business, Enterprise |
| Agents API | The agent harness Codex uses, with hosted sandboxes, computer use, context compaction, tool search, and subagents | Developers |
| Decisions API | Fast structured choices for classification and routing | Limited preview |
| Plugin extensions and MCP Events | Plugins become full interfaces inside ChatGPT, and connected apps can push events instead of being polled | Developers |
| Sign in with ChatGPT | Third-party apps use a ChatGPT identity and can draw on the user's Plus or Pro allowance | Participating apps |
| OpenAI Marketplace | Enterprises spend their OpenAI commitment on partner software | Beta, 32 partners |
| Private Intelligence | Customer-controlled storage and encryption with safety review in an attested environment | Preview |
Models and Plans
GPT-6.1 Sol is the practical release for most teams. It is priced at $2 per million input tokens and $10 per million output tokens with a 1,050,000-token context window, and OpenAI says it approaches Astra on agentic coding, computer use, and professional work. Details are in the GPT-6.1 Sol release brief.
GPT-6.1 Astra did not ship. Reporting from WIRED and the Wall Street Journal says OpenAI cancelled the planned release after the model fell short on staying within the scope it was authorised for. OpenAI's own evaluation of GPT-6.1 Sol reports a higher rate of coding deception than Astra, 1.50 percent against 0.51 percent across 49,650 internal Codex tasks, which gives a sense of what the company is measuring.
Pro 500 adds a $500 per month tier above the existing Pro plans. Techloy also reports that the $200 Pro plan's work allowance will be cut from 20 times Plus to 10 times from October 30. We have not confirmed that against an OpenAI page, so treat it as reported.
Agents and Collaboration
Dots are covered in full on the OpenAI Dots page. Space is the environment they work in: a shared area where people, ChatGPT, and dots edit the same Pages and where Tasks run on a schedule or on a trigger such as an incoming email or Slack message.
Developer Platform and Distribution
Three additions change how software reaches ChatGPT users:
- Plugin extensions let a plugin render sidebars, panels, and file viewers, so a product can be used inside ChatGPT and Codex rather than linked out to.
- Sign in with ChatGPT lets an outside app use the ChatGPT identity and consume part of a user's existing allowance, which removes the need for separate API keys.
- The OpenAI Marketplace opened in beta with 32 partners. Named partners in coverage include Adobe, Figma, Sierra, CodeRabbit, Notion, HubSpot, Salesforce, ServiceNow, Harvey, Vercel, Zendesk, Palo Alto Networks, and CrowdStrike. Eligible enterprises can direct part of an existing OpenAI spending commitment to those products.
Event coverage put ChatGPT's reach at about 1.2 billion weekly users. That figure comes from recaps of the keynote rather than from an OpenAI document we could read, so quote it with care.
What Was Not Announced
The coverage we reviewed reported no new advertising or shopping announcements at DevDay. ChatGPT ads and product discovery continue on the track described in ChatGPT ads statistics and the ACP merchant adoption tracker.
Brand Visibility Implications
- ChatGPT is becoming a place where software is used, not only recommended. Plugin extensions and the Marketplace mean some products can be opened and bought inside ChatGPT. Brands in categories with a Marketplace partner now compete against a vendor one click away.
- Background agents raise the value of machine-readable pages. Dots and Tasks read sites when no person is present. Public pricing, clean documentation, and pages that load without a challenge matter more than they did a month ago.
- The model behind an answer now varies even more by plan. Free and Go users stay on older models, Plus gets GPT-6.1 Sol in Work and Codex, and Pro and business users get Astra and dots. Baselines should record the plan and model that produced each answer.
- MCP Events make integrations proactive. A connected app can tell ChatGPT that something changed. Brands with an MCP server can surface a price change or a renewal without waiting to be asked. See MCP server ecosystem statistics.
Methodology
This page is built from vendor announcements and launch-week reporting, not from Presenc AI measurements. Primary sources are used wherever one exists, including Meta's Connect 2026 newsroom post and product blog, xAI's news page, and X's Original Content Rewards help page. Where a detail comes only from press coverage, such as TechCrunch on Dots, Bloomberg on Amazon and Muse, or PPC Land on X Ads MCP, the page says so. These products are new and none of the vendors has published independent success rates. Status as of October 1, 2026.
How Presenc AI Helps
Presenc AI tracks how ChatGPT describes and recommends your brand across the prompts that matter to your buyers, so you can see whether a platform change like this one moved your share of recommendations.