DevDay 2026: OpenAI turns ChatGPT into an agent platform

2026-09-29 · Publisher : OpenAI · Domain : Artificial Intelligence

On September 29, 2026, OpenAI held its DevDay: more than 20 announcements, including dots agents, GPT-6.1 Sol, the Ultrafast tier, computer use in the Agents API and ChatGPT plugin extensions.

What changes

  • Always-on agents: dots, powered by GPT-6 Astra, get their own computer in the cloud.
  • GPT-6.1 Sol: near-Astra intelligence at one-fifth of Astra's standard API prices.
  • Codex in the cloud, refreshed CLI, automatic code review and Codex Security Cloud.
  • Agents API with computer use, Decisions API in limited access, Bedrock Managed Agents on AWS.
  • ChatGPT becomes a shared workspace: Space, Pages, collaborative slides, plugin extensions.

On September 29, 2026, OpenAI held its annual DevDay, described by the company as its "biggest yet": more than 20 announcements across ChatGPT, Codex, models and the API. ### In detail - **Agents**: launch of dots, always-on agents powered by GPT-6 Astra, and of the GPT-6.1 Sol model (dedicated entries). - **Codex**: cloud execution with reusable environments, refreshed CLI (voice, /agents view, built-in worktrees), code review for GitHub and GitLab, Codex Security Cloud. - **API**: computer use in the Agents API, Decisions API (classification and routing over predefined answers), Bedrock Managed Agents on AWS. - **Plugins**: extensions (sidebar, panel, viewer), support for the proposed MCP Events specification, plugins in Sites. - **Collaboration**: ChatGPT Space, Pages, collaborative slides exportable to PowerPoint, @ChatGPT in Slack and Teams. ### Specifications - Ultrafast: up to 8x faster generation in Codex (300 tokens per second) and 6x in the API, according to OpenAI; GPT-6 Astra Ultrafast priced at $60 and $300 per million tokens. - New $500-per-month Pro tier with the highest usage limits. - Private Intelligence: Zero Data Retention with Private Safety Processing, Private Inference in preview. - OpenAI Marketplace (beta): 32 partner vendors, including Adobe, Figma, Salesforce and CrowdStrike. - Claimed audience: 1.2 billion weekly users. ### Why it matters OpenAI moves from conversational assistant to agents that work continuously, and turns ChatGPT into a surface where developers and agents ship experiences directly. The Codex harness becomes a managed service. ### Key takeaways Several announcements remain in limited access or "coming soon": Decisions API, GPT-6.1 Sol Ultrafast, Private Inference, Meetings plugin (beta).

Links

Tags : OpenAI, DevDay, Agent, Codex, ChatGPT, API