🔍 Read the full analysis: OpenAI Dev Day 2026: A Practical Guide To The Announcements on ThorstenMeyerAI.com
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TL;DR
At DevDay on 29 September 2026, OpenAI announced more than 20 products and features that shift ChatGPT from a chatbot toward an agent platform. The headline items are Dots (always-on personal agents powered by GPT-6 Astra), a major plugins upgrade, the Decisions API, computer use in the Agents API, and Sign in with ChatGPT, alongside the cheaper GPT-6.1 Sol model.
OpenAI used its DevDay on 29 September 2026 to announce more than 20 products and features that reposition ChatGPT as an agent platform rather than a chatbot, with the company saying the service now reaches 1.2 billion weekly users. The announcement that matters most for developers and businesses is a bundle of five launches: Dots, always-on agents powered by GPT-6 Astra; a rebuilt plugins system; the Decisions API; computer use in the Agents API; and Sign in with ChatGPT. The company also introduced GPT-6.1 Sol, a model it describes as offering near-Astra intelligence at one-fifth of Astra’s token prices.
Dots are OpenAI’s biggest consumer bet in the announcement. A dot is a persistent agent that works toward a user’s goals continuously, learns preferences over time, and can manage several projects at once. According to OpenAI, each dot runs on GPT-6 Astra, has its own cloud computer and browser, and can reach over 4,000 apps through plugins. Access is through ChatGPT on desktop, web and mobile, plus Slack and Teams; voice calls are available now, with texting described as coming. The first dot is included in Pro and Business Premium plans in eligible markets, and chatting with a dot does not count toward usage limits, though tasks it starts in Codex or ChatGPT Work do. Enterprise, Edu and Healthcare customers can use a beta once an admin enables it — it is off by default.
OpenAI framed control as the design constraint for Dots. Each dot works on its own cloud computer, dots can use saved passwords without exposing them to the model, and background “proactive research” is limited to read-only tools. Custom Rules let users allow, require approval for, or block specific actions, and an Activity View shows background work. The company still warns that dots can make mistakes. An enterprise counterpart, specialist dots, gives agents their own identity, credentials and IT-provisioned hardware, with pilots starting in procurement, invoice processing, email marketing, customer support and commercial contracting.
The plugins announcement bundles several changes: plugin extensions that live inside the ChatGPT sidebar (Figma and Adobe showed integrations), a Plugin Creator and new submission flow, improved discovery, Sites that can host plugins for teams, and support for the proposed MCP Events specification for triggering automations. An OpenAI Marketplace lets eligible enterprise customers spend part of their OpenAI commitment with 32 launch partners, including Figma, Adobe, Salesforce, ServiceNow, Harvey, CrowdStrike and Baseten. The Decisions API, which applies GPT-6 Luna to narrow classification choices from a finite list of answers a developer defines, is in limited preview. The Agents API now supports computer use, with OpenAI running the Codex harness on the developer’s behalf, and Sign in with ChatGPT lets users carry their existing plan into 16 launch partners.
OpenAI DevDay 2026 at a glance
The five launches that matter, plus Sol
The rest of the slate
Collaboration
ChatGPT SpacelivePagesliveCollaborative slidesnext few weeksTeams and Team Taskslive@ChatGPT in Slack and TeamsliveMeetings pluginbeta, macOSShareable profilesliveCodex
Codex CloudliveCLI refreshvoice, /agentsCode ReviewliveCodex Security CloudlivePlans, enterprise, speed
Pro 500$500, 25× PlusUltrafastAstra now, Sol soonPrivate IntelligencePrivate Inference this fallBedrock Managed Agentsruns in AWSOpenAI Marketplace32 partners, applyWhy Agent Distribution Changes Software Sales
The commercial stakes are highest in plugin distribution. Because dots reach over 4,000 apps through the plugin ecosystem, being visible in that directory can decide whether an agent sends work to a given business. OpenAI’s own framing of the shift is that an agent picks a business by outcome, not by brand: the customer asks for a result, ChatGPT understands the job, and a plugin is selected before the customer knows the vendor’s name. For builders, that makes measuring intent, activation and completion — why a plugin was selected or ignored — the new competitive question.
The developer documentation also signals OpenAI’s intent to absorb skills built elsewhere: it lists conversion specs for restaurant reservations, quote requests and product checkout, and a guide for submitting a Claude Code plugin, suggesting OpenAI wants plugins built for competing agent ecosystems to run inside its own. Sign in with ChatGPT, meanwhile, makes a free core app with paid upsells workable for launch partners, a model that lowers the barrier for consumer-facing developers.
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From Chatbot to Platform in One DevDay
OpenAI has held DevDay events in prior years to pitch developers on its API ecosystem, but the 2026 edition marks the company’s most explicit repositioning of ChatGPT as a shared surface for humans and agents rather than a conversational product. The claimed scale — 1.2 billion weekly users — makes any change to how work is routed inside ChatGPT immediately consequential for software vendors.
The announcements also continue OpenAI’s adoption of open interoperability standards. Support for the proposed MCP Events specification, alongside existing MCP server connections inside plugins, ties ChatGPT and dots into the same plumbing that other agent platforms use, while the Claude Code submission guide indicates where OpenAI sees the boundary of its ecosystem ending — namely, nowhere in particular.
“An agent picks a business by outcome, not by brand.”
— ThorstenMeyerAI.com commentary
What OpenAI Left Unfinished or Unpriced
Several elements are not yet generally available. The Decisions API is in limited preview, with OpenAI promising a broad release but without a firm date in the material provided. Texting with dots is described as “coming” rather than shipping. Enterprise, Edu and Healthcare access to Dots depends on an admin opting in to a beta that is off by default.
OpenAI’s own examples of what a dot can do — returning tested pull requests with videos, rerunning a scientist’s analysis, or the early tester whose dot drafted and sent an invoice after approval — come from the company or small early-user anecdotes, not independent evaluation. The claim of 1.2 billion weekly users is OpenAI’s own figure and has not been verified by a third party. Pricing beyond the first included dot is vague: OpenAI says users will later be able to “add dots or buy more speed and monthly output per dot,” without published rates. The scope of the promised Microsoft Agent 365 integration for specialist dot governance is also not detailed, and the more than 20 announced items include a “rest of the slate” — Ultrafast, Pro 500 and others — that OpenAI covered separately and this report does not fully detail.
Rollout Timeline and Marketplace Expansion
In the near term, watch for the Decisions API to move from limited preview to broad release, the arrival of texting for dots, and publication of concrete pricing for additional dots and per-dot output limits. OpenAI has said teams of dots working together are envisioned for later, and the Microsoft Agent 365 integration for specialist dot governance is on the roadmap for enterprise deployments.
For developers, the practical next steps OpenAI laid out are building plugins through the new Plugin Creator, submitting them via the revised review flow, and — for vendors in competing ecosystems — using the Claude Code submission guide to port existing skills. Enterprises eligible for the OpenAI Marketplace will be deciding whether to spend existing OpenAI commitments with the 32 launch partners, a list likely to grow as plugin submissions scale.
Key Questions
What are Dots in OpenAI’s DevDay 2026 announcement?
Dots are always-on personal agents powered by GPT-6 Astra. Each has its own cloud computer and browser, connects to over 4,000 apps through plugins, and works toward a user’s goals continuously. The first dot is included in Pro and Business Premium plans in eligible markets.
When can everyone use the Decisions API?
Not yet. The Decisions API, which uses GPT-6 Luna to pick answers from a finite list a developer defines, is in limited preview. OpenAI has promised a broad release but has not given a firm date.
How much do Dots cost?
According to OpenAI, the first dot is included in the plan, and chatting with it does not count toward usage limits — though tasks it starts in Codex or ChatGPT Work do. Pricing for additional dots, extra speed, and higher monthly output per dot has not been published.
Can businesses reach ChatGPT users without OpenAI building an integration for them?
Yes, through plugins. A plugin bundles skills, MCP-based connections and optional UI, is published once to a shared directory, and can appear in the ChatGPT sidebar via plugin extensions. Figma and Adobe demonstrated integrations at the event, and a guide exists for submitting Claude Code plugins.
What is GPT-6.1 Sol?
It is a new model OpenAI describes as offering near-Astra intelligence at one-fifth of Astra’s token prices. It is part of a broader slate that also includes Ultrafast and Pro 500.
Source: ThorstenMeyerAI.com
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