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Apple Delays Siri AI Upgrade to Spring 2026 in iOS 26.4

The setback stems from engineering hurdles linked to a buggy hybrid architecture under new project leadership.

The man charged with making Siri smarter promises to get the job done.
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Overview

  • Apple executives Craig Federighi and Greg Joswiak confirmed the upgraded Siri features, first previewed in iOS 18, will now arrive in iOS 26.4 next spring.
  • Internal release targets have shifted repeatedly—from fall 2024 and early 2025 to now spring 2026—as Apple addresses quality concerns.
  • A Bloomberg report reveals that a faulty hybrid architecture caused about one-third of Siri operations to fail, prompting a ground-up rebuild of its machine-learning core.
  • Apple has faced criticism and class-action lawsuits for promising features that missed their deadlines, and it has reassigned the project to Craig Federighi and Mike Rockwell after sidelining head of AI John Giannandrea.
  • The company plans to enhance Siri with deeper app integration and evolve it into a proactive digital copilot that could be previewed at its fall iPhone event if development proves promising.