OpenAI DevDay 2026: live updates

ChatGPT says users can mention @ChatGPT in Slack or Microsoft Teams channels, threads, or DMs to turn a conversation into a plan, slides, or a spreadsheet. It can use approved connected sources for context beyond the thread, and the feature is available to Business and Enterprise plans without requiring each teammate to have an individual ChatGPT license.

OpenAI says GPT-6.1 is included in all paid plans and available through the API today. The company describes the model as “unbelievably efficient.”

OpenAI is adding app-like interfaces for developers’ tools in ChatGPT, placing them in the sidebar and within conversations. The company also plans support for connected-app events that can start automations without a new request.

OpenAI Developers listed additional features in the Codex CLI update, including `/usage` analytics, themes, managed worktrees, Mermaid and LaTeX rendering, collapsible diffs and tool output, and dedicated areas for status, hints and keyboard shortcuts.

OpenAI Developers says Codex CLI users can use `/agents` to see running tasks, check their progress and switch between them. They can also use `/fork` to branch a conversation into a worktree with the same context and a separate checkout.

OpenAI says Codex cloud environments are rolling out to Plus, Pro, Business and Enterprise. Business and Enterprise workspaces can share environments so teams use the same setup.

OpenAI says Agents API computer-use tasks run in an OpenAI-hosted browser, while website access approvals and sign-in are handled by the developer’s application. This adds implementation detail to the previously announced computer-use support.

OpenAI says its UltraFast tier offers up to 8× faster token generation in Codex, reaching 300 tokens per second, and up to 6× faster generation in the API. These are the company’s figures.

OpenAI says GPT-6.1 Sol reduced responses containing factual errors by about 32% versus GPT-6 Sol on deliberately difficult factuality prompts at low reasoning effort. The company also says it observed no attempts to bypass the safety reviewer in its automated safety review evaluation.

OpenAI says GPT-6.1 Sol scored 31.7% on AutomationBench at medium reasoning effort, 4.8 percentage points above GPT-6 Sol at the same setting. On OSWorld 2.0’s offline set, OpenAI reports Sol scored 71.4% versus Astra’s 73.5% at maximum effort, at roughly one-seventh of Astra’s cost per task.

OpenAI says GPT-6.1 Sol scored 75.2% on DeepSWE v1.1 at high reasoning effort, versus GPT-6 Sol’s best score of 68.8% at maximum effort. The company says Sol’s cost per task was approximately 76% lower.

OpenAI said it is running a Codex Game Studio session where attendees can build a retro game with Codex. A slide shown during the segment lists the session for 1 p.m. today.

OpenAI said a later session will cover its continued investment in the open-source community, including what Sam Altman called “our new OpenCL.” The segment did not explain what OpenCL is.

OpenAI said users can access open-source models in the Marketplace starting today.

OpenAI said enterprise customers can now use part of their existing OpenAI commitment to buy products in the Marketplace. It also said customers with an OpenAI commitment can spend it there.

OpenAI said it is launching the OpenAI Marketplace with more than 30 launch partners, including CodeRabbit.

OpenAI said ChatGPT will recognize when a plugin could help with a user’s question and let the user connect it in the conversation. The company also said it plans to simplify plugin submissions; Sam Altman began describing a tracking feature, but the sentence was cut off.

OpenAI said sites built with ChatGPT can support connected plugins and data. The company said users can share a site with their team, whose members can log in with their own credentials and bring their own agent.

OpenAI showed an Adobe example where users can use a Photoshop feature inside ChatGPT. Sam Altman said Adobe and Figma are among dozens of launch partners building plugin extensions.