OpenAI has launched a native macOS app for Codex, its AI-powered coding agent platform, marking a significant step forward in agentic software development. The new application serves as a dedicated command center for building with agents, enabling developers to run multiple AI agents in parallel while maintaining isolated code changes and seamless workflow integration.
Key Features and Capabilities
The Codex app brings several advanced features designed to streamline the development process:
Multi-Agent Coordination: Developers can now work with multiple agents simultaneously using worktrees, allowing different agents to work on the same repository without conflicts. Each agent operates on an isolated copy of the codebase, letting developers explore multiple development paths in parallel.
Automated Workflows: The app includes automations that can run Codex in the background on a predetermined schedule. Results land in a review queue for developers to assess and continue working when needed.
Agent Personality Selection: Users can select different agent personalities—from pragmatic to empathetic—depending on their working style, allowing customization of how the AI approaches coding tasks.
Reusable Skills Framework: The app includes a library of agent skills, an open format originally developed by Anthropic, that extends Codex beyond code generation to information gathering, problem-solving, and writing tasks.
Expanded Access and Rate Limits
For a limited time, OpenAI is making Codex available to ChatGPT Free and Go users. Additionally, rate limits are being temporarily doubled for all Plus, Pro, Business, Enterprise, and Edu users across the Codex app, CLI, IDE extension, and cloud.
Performance and Model Capabilities
The app runs on GPT-5.2-Codex, OpenAI’s most powerful coding model launched in mid-December 2025. Since the GPT-5.2-Codex launch, overall Codex usage has doubled, and in the past month, more than a million developers have used Codex.
The model holds the top spot on TerminalBench, a test measuring how well AI handles command-line programming tasks, though competing models from Anthropic and Google show comparable performance on other benchmarks.
Platform Integration and Future Plans
The Codex app integrates seamlessly with the Codex CLI and IDE extensions, allowing developers to pick up their session history and configuration immediately. OpenAI is already working on bringing the Codex app to Windows, with additional features for real-time collaboration and task delegation planned.
OpenAI CEO Sam Altman emphasized that GPT-5.2-Codex enables sophisticated work on complex projects at unmatched speeds, positioning the app as a competitive response to similar offerings from Anthropic.