3OpenAI Release Notes·
OpenAI Codex app adds MCP command palette and queued follow-ups
OpenAI's Codex app received a minor update adding MCP (Model Context Protocol) and personality actions to the command palette, along with a change to queue follow-up interactions by default. The update also includes unspecified performance improvements and bug fixes. The MCP integration is the most notable element, continuing the trend of MCP adoption across AI coding tools.
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OpenAI Codex app adds MCP shortcuts and review mention support
OpenAI's Codex app received a feature update adding MCP shortcuts in the composer—including install keyword suggestions and an MCP server submenu—alongside @mention and skill mention support in inline review comments. The release also includes improved rendering of MCP tool calls and Mermaid diagram error handling. The update signals continued integration of the Model Context Protocol into OpenAI's developer tooling.
OpenAI Codex app update: realtime voice context and MCP panel stability fixes
OpenAI released a minor update to the Codex app adding a tooltip clarifying that realtime delegation messages use surrounding voice conversation as context. The update also fixes search navigation in long review files, prevents embedded MCP app panels from losing state during fullscreen changes, and resolves several desktop regressions including tray crashes and macOS hotkey issues.
OpenAI Codex app update: workspace settings, Windows native support, MCP approval panels, and agent composer features
OpenAI shipped a Codex app update adding workspace settings, native Windows updater with MSIX and system tray support, and MCP custom approval panel handling. The automation composer gains app/file @mentions, subagent diff stats, and artifact cards for file citations. The release also includes a range of bug fixes covering multi-window issues, review panel behavior, and thread search performance.
OpenAI Codex app adds conversation forking and model-switching slash commands
OpenAI's Codex app received a feature update adding conversation forking from arbitrary earlier messages, slash commands for switching models and reasoning levels mid-draft, and plan-mode notifications. Bug fixes address thread handoff and subagent navigation issues in worktrees and the VS Code extension. The update reflects ongoing iteration on agentic coding UX patterns.
OpenAI Codex app adds branch search, plan mode, and parallel approvals
OpenAI's Codex app received a minor update adding branch search in the branch picker, clearer guidance for entering plan mode, and support for parallel approvals. The release also includes unspecified performance improvements and bug fixes. These are incremental UX and workflow enhancements to OpenAI's coding agent product.
Codex for (almost) everything: OpenAI expands Codex app with computer use, browsing, image generation, memory, and plugins
OpenAI has updated its Codex desktop application for macOS and Windows with a broad set of new capabilities including computer use, in-app browsing, image generation, persistent memory, and plugin support. The update positions Codex as a more comprehensive agentic developer tool rather than a pure code-completion assistant. These additions bring Codex closer to a general-purpose AI agent environment targeting developer workflows.
OpenAI Codex adds plugin system with MCP server configuration support
OpenAI has shipped a plugin system for Codex that allows installable bundles packaging skills, app integrations, and MCP server configuration for reusable workflows. Plugins are available across the Codex app, CLI, and IDE extensions, and can be installed per-user or per-repository. The system supports both a curated public plugin directory and local plugin scaffolding via a built-in @plugin-creator skill. The inclusion of MCP server configuration as a first-class plugin component signals continued convergence on MCP as a standard for tool integration in agentic coding environments.
OpenAI Codex app adds GPT-5.3-Codex model, mid-turn steering, and file attachments
OpenAI released updates to the Codex app introducing support for GPT-5.3-Codex, a new mid-turn steering capability allowing users to redirect the model while it is actively working, and support for arbitrary file attachments. Mid-turn steering is a notable agentic UX feature that enables real-time human-in-the-loop intervention during long-running tasks. The release also includes a minor UI bug fix.