OpenAI DevDay 2026 Recap for Developers

OpenAI announced a series of product and developer updates at DevDay 2026, according to a recap by Daniel Dominguez. The releases include GPT-6.1 Sol, computer use for the Agents API, cloud-based Codex environments, a Decisions API, and new plugin capabilities for ChatGPT.

For developers building agents, the Agents API now supports computer use, allowing applications to operate software through graphical interfaces. The API also incorporates multi-agent capabilities from Codex, tool search, tool calling, and context compaction, with OpenAI managing the underlying execution infrastructure. The functionality is available through the API and in Codex and ChatGPT Work for selected plans.

OpenAI released GPT-6.1 Sol, described as an update to GPT-6 Sol aimed at coding, computer use, and professional tasks. OpenAI says the model approaches GPT-6 Astra on several evaluations while charging one-fifth of Astra's standard input and output token prices. Cached input costs $0.10 per million tokens. GPT-6.1 Sol is available through the API, ChatGPT Work, and Codex.

Codex can now run in cloud environments in addition to local computers, allowing developers to start remote tasks from other devices. OpenAI updated the Codex CLI with voice input and an /agents interface for delegating and monitoring multiple tasks. A code-review workflow can analyze diffs and potential issues in GitHub pull requests and GitLab merge requests, while Codex Security Cloud can scan repositories and new commits, investigate findings, remove duplicates, and prepare fixes.

The Decisions API is in limited preview. It uses the smaller Luna model to select from a predefined set of answers based on text or image context, positioned for tasks such as classification, request routing, and choosing an agent's next action.

ChatGPT's plugin system was expanded so developers can build sidebar experiences, interactive conversation panels, and custom file viewers. Plugins can respond to events through the proposed MCP Events specification, allowing automations to start when an event occurs in a connected application. DevDay also introduced Dots, described as persistent agents that can work on ongoing tasks, and ChatGPT Space, a shared workspace where teams and agents can work with common context.

Community discussion focused on the emphasis on agents and developer infrastructure. Developers highlighted computer use, cloud-based Codex, and lower-cost models as practical additions, while others questioned whether the releases represented significant advances over capabilities already available across existing agent platforms.

OpenAI Developer Victor Nunez said Dots improved greatly in a single week before DevDay and that he expects it to become the favorite way of interacting with AI for most people. Developer @TokenGremlin wrote that GPT-6.1 Sol might be the best release in OpenAI's history, describing it as Luna pricing with Astra-level quality.