Apple has released Xcode 26.6 (17F113), expanding its built-in AI coding assistants with support for Google's Gemini, making Gemini available alongside Anthropic Claude Agent and OpenAI Codex. Developers can use Gemini to generate code, answer questions, and collaborate on complex programming tasks without leaving Xcode. Xcode 26.6 also adds support for the Agent Client Protocol (ACP), allowing additional AI coding assistants to integrate with the IDE through a standardized interface. The update includes Swift 6.3 and SDKs for iOS 26.5, iPadOS 26.5, tvOS 26.5, watchOS 26.5, visionOS 26.5, and macOS 26.5, and also includes bug fixes and stability improvements. Apple first introduced agentic coding in Xcode 26.3 with support for Anthropic Claude Agent and OpenAI Codex, then added Gemini to the Xcode 27 beta following its WWDC preview. Xcode 26.6 is available as a free download from the Mac App Store and the Apple Developer website.