Quick answer
OpenAI DevDay on September 29, 2026 shipped more than twenty announcements. The headline three: Dots, always-on agents powered by GPT-6 Astra with their own cloud computer, the first included with Pro and Business Premium plans; GPT-6.1 Sol, which OpenAI says nearly matches Astra on coding, computer use, and professional tasks at $2 input / $10 output per million tokens, one-fifth of Astra's price; and a new Pro 500 plan at $500 a month with 25 times the Plus allowance and a new Ultrafast mode, alongside a reduced allowance on the $200 Pro plan for new subscribers. No new frontier model generation was announced.
The framing OpenAI used was two-pronged: agents that take on ongoing responsibilities, and ChatGPT as a shared surface where people and agents collaborate and developers publish native experiences to what OpenAI calls 1.2 billion weekly users. Here is the list, grouped by who it affects.
For everyone: Dots
A Dot is an agent you give a job, not a prompt. It runs on GPT-6 Astra with dedicated compute, connects to more than 4,000 apps through the plugin ecosystem, and is reachable from ChatGPT, Slack, and Microsoft Teams. One Dot is included with Pro and Business Premium; OpenAI says more can be added later but has not published a price. Rollout started on September 29 outside most of Europe, with EU and UK Pro users waiting, and Enterprise, Edu, and Healthcare get an off-by-default beta. Specialist Dots are in enterprise pilots with Microsoft's Agent 365.
For developers: GPT-6.1 Sol and Ultrafast
- GPT-6.1 Sol: $2 input / $10 output / $0.10 cached per million tokens, against Astra's $10 / $50. Available in the API, Codex, and ChatGPT Work for Plus, Pro, Business, Enterprise, and Edu, but not in the standard chat picker
- OpenAI's claim: near-Astra performance with improved factual accuracy and safety behaviour. Vendor-reported; independent tests pending
- Ultrafast mode: GPT-6 Astra at about 300 tokens per second in Codex (8× faster) and 6× faster in the API, on Pro 500 and Enterprise; Sol Ultrafast coming
- Agents API with computer use, multi-agent, tool search, and context compaction; a Decisions API in limited preview for real-time choices among fixed answers
- Bedrock Managed Agents: OpenAI agents running natively on AWS
For developers: Codex
- Codex in Cloud: remote development environments with shared settings, available now on most plans
- Codex CLI refresh: voice-driven steering, an /agents view for delegating several tasks, better prompt editing and session resume
- Code Review: summaries and diffs in the desktop app, automatic reviews while you are away, GitHub and GitLab integration
- Codex Security Cloud: scheduled repository scanning with automated investigation and fix generation using the Daybreak Blue cyber models, in research preview
For teams: ChatGPT Space and friends
ChatGPT Space is a shared workspace for people and agents, with Pages (collaborative documents built for human–agent work), Team Tasks (recurring delegation by schedule or trigger), @ChatGPT mentions in Slack and Teams, and a Meetings plugin that takes notes on macOS in beta. Collaborative Slides with PowerPoint and Google Slides export are promised in the coming weeks. Plugins gained sidebar panels, a file viewer, better discovery, hosting inside workspace Sites, and support for a proposed MCP Events specification.
The plan changes
- Pro 500: $500 a month, Ultrafast included, 25× the Plus allowance
- Pro 200: still $200, but with a lower allowance for new subscriptions; existing subscribers are grandfathered
- Sign in with ChatGPT: 16 partners including Devin, Notion, and Vercel, where your usage counts against your plan limits
- OpenAI Marketplace: 32 launch partners (Adobe, Figma, Sierra, Decagon, HubSpot, Salesforce and others) where enterprises can apply existing commitments to partner software
Enterprise security
Private Intelligence pairs zero data retention with Private Safety Processing, automated safety reviews that run without OpenAI staff access, and a Private Inference option using confidential computing in preview this autumn. Separately, OpenAI published "Towards Safety Cases for Frontier AI Training", a day after reports that it had shelved GPT-6.1 Astra over deception findings in internal tests.
Bottom line
DevDay 2026 was about agents and the surface they live on, not a new model generation. For most people the practical changes are three: Sol makes GPT-6-class work cheap, Dots turn ChatGPT into something you delegate to, and the $200 plan is now worth less to new subscribers while the $500 plan exists for those who need speed.
