Xcode 26.3 adds agentic coding with Claude Agent, Codex, and other AI tools via MCP

Apple has released Xcode 26.3, expanding developer tools for creating apps on Apple platforms. Building on features from version 26, this update introduces agentic coding, enabling developers to integrate advanced coding agents like Anthropic’s Claude Agent and OpenAI’s Codex directly into Xcode.

With these integrations, developers can streamline workflows throughout the development cycle. Agents now have the ability to search documentation, explore file structures, update project settings, capture Xcode previews, and iterate on builds and fixes. This level of access enables coding agents to assist with a range of development tasks, providing flexibility and increased speed for app creation.

Xcode 26.3 offers seamless connectivity to both Claude Agent and Codex. Developers can choose the model that fits their needs, bringing advanced reasoning capabilities into their workflows for better results across different project types. In addition to these built-in options, the introduction of the Model Context Protocol means Xcode is now open to any compatible coding agent or tool, expanding customization opportunities for advanced users and teams.