OpenAI desktop multi‑agent push

OpenAI has pushed its coding agents onto the desktop, adding a Windows version of the Codex app and updating GPT‑5.4 Thinking in ChatGPT. (openai.com) OpenAI said in a March 4, 2026 update that the Codex app is now available on Windows after launching first on macOS in February. The company’s Windows documentation says the app lets users work across projects, run parallel agent threads, and review results from one interface. (openai.com) (developers.openai.com) On Windows, Codex runs natively with PowerShell and the Windows sandbox, and OpenAI says users can also configure it for Windows Subsystem for Linux 2. The app is distributed through the Microsoft Store, according to the developer docs. (developers.openai.com) A coding agent is software that can take a task like fixing a bug or writing a feature, work through files, and return changes for review. OpenAI describes the Codex app as a desktop “command center” for running those agent threads in parallel with built-in Git tools and separate worktrees, which are isolated copies of a codebase. (openai.com) (developers.openai.com 1) (developers.openai.com 2) OpenAI also updated GPT‑5.4 Thinking in ChatGPT on March 5, 2026. In its model release notes, the company said GPT‑5.4 combines reasoning, coding, and agentic workflows in one model, and in ChatGPT it replaced GPT‑5.1 Thinking after the older model was retired on March 11. (help.openai.com) The desktop push gives developers a local surface for long-running agent work instead of bouncing between a browser, command line, and integrated development environment. OpenAI’s feature page says one Codex window can manage tasks across projects, with a review pane for diffs before changes are accepted. (developers.openai.com 1) (developers.openai.com 2) OpenAI has kept expanding what the app can do since launch. In a post published April 16, 2026, the company said the macOS and Windows versions now add computer use, in-app browsing, image generation, memory, plugins, pull request review, multiple files and terminals, and Secure Shell connections to remote development boxes. (openai.com) The product is also being tied more directly to ChatGPT plans and business sales. OpenAI’s help pages say Codex is included with ChatGPT Plus, Pro, Business, and Enterprise or Edu plans, and Enterprise got a new flexible-price Codex seat on April 2, 2026. (help.openai.com 1) (help.openai.com 2) That leaves OpenAI with a clearer pitch than a web chatbot alone: ChatGPT for the conversation, GPT‑5.4 Thinking for the reasoning, and Codex on desktop for the actual code work. The company’s own product pages now frame the app as the place where multiple agents can work side by side on real software tasks. (help.openai.com) (openai.com)