Apple's New AI Writing Tools: An Editor You Never Hired

Bloomberg’s Mark Gurman, the Power On newsletter author and the industry's go-to Apple insider, reports that in iOS 27, the grammar checker stops being a button and becomes a background layer of the OS. In Messages, Mail, and any text field, the system will reveal edits on its own with a translucent menu that slides up from the bottom of the screen, letting readers accept one edit at a time, accept all, dismiss everything, or pause. The Write With Siri toggle and the Help Me Write option sit right alongside this menu.

Today, invoking Writing Tools still takes a deliberate choice, as it has since their debut in iOS 18: you select text, ask for Proofread, get a suggestion, and make a call. Tomorrow, edits will run by default in every field. The philosophy shifts with a single checkbox in Settings.

The editor nobody hired

Calling up an editor yourself is a conscious act, something you do when you actually need it. Dismissing an editor you didn't ask for is also an act, except now you'll have to perform it in every field of every message. Messages add up fast. Resistance gets old quickly, acceptance is easier, and hunting through Settings to turn the thing off is a lost cause for the average user. The default beats whatever is buried in settings — half of product engineering is built on that premise.

Apple frames this as convenience with a privacy guarantee: text is processed on device or through Private Cloud Compute and goes nowhere. On its own support page, however, Apple openly warns that Writing Tools results may contain factual errors. A background editor prone to hallucinations is a paradox that won't be finding its way onto any keynote slide. Such an editor also leaves fingerprints: machine-smoothed prose is precisely how AI detectors flag edited text.

The line between "I wrote it this way" and "something corrected me" shifts to a place where you stop noticing it at all. The operating system quietly stops being a tool and becomes a co-author nobody hired. (Well, no one except Apple's executives.) If edits are everywhere and switched on by default, whose voice stays on the page?

A storefront for other people's models

Apple decided not just how to edit text, but who would do the editing. The company's own models can only handle lightweight tasks like setting timers, making calendar entries, or finding cats in photos. (Tim Cook, according to Bloomberg, was unhappy with the pace of Siri's development and handed oversight of the project to Mike Rockwell.) For heavy lifting — long-form writing, code, analysis — Siri becomes a dispatcher routing requests to outside contractors.

ChatGPT was the first to get access to the iOS core with the iOS 18 integration. At WWDC 2024, Craig Federighi publicly promised Gemini "and other models in the future." The main plan looked different: in the summer of 2025, Apple was testing custom versions of Claude on its own servers. The plan was to rebuild Siri around Anthropic’s model.

Then Anthropic named its price.

"They were not going to use Google. Apple actually was going to rebuild Siri around Claude. But Anthropic was holding them over a barrel. They wanted a ton of money from them, several billion dollars a year, and at a price that doubled on an annual basis for the next three years." — Mark Gurman, TBPN

According to Gurman, Google wasn't even in the running at first. The Department of Justice antitrust case was ongoing, and Apple's entire partnership with Google was in question. Then the judge ruled the deal legitimate. In January 2026, the two companies signed a multi-year contract with an estimated value of around $1 billion a year. The best model didn't win. The best number in a budget line did.

The irony is that inside Apple, the whole thing is flipped.

"Apple runs on Anthropic at this point. Anthropic is powering a lot of the stuff Apple's doing internally in terms of product development and tools. They have custom versions of Claude running on their own servers internally, too." — Mark Gurman, TBPN

Engineers build products on Claude; users get sold Gemini. According to Gurman, OpenAI handles image generation, Gemini powers Siri, and Claude stays behind the scenes. The marketplace of models already exists — it's just that procurement makes the choice, not the user.

Who picked Gemini, you or procurement?

With iOS 27, Apple is promising Extensions — a system that lets users choose a third-party AI as their backend from within settings. This isn't a concept; it's a fully detailed feature. The default will almost certainly be Google, though, and the default wins.

Apple made both decisions on the user's behalf: that AI would edit their text and whose AI it would be.

You can still install a standalone Claude app on iPhone, iPad, and Mac directly, with no Siri in the middle. But the consent that actually matters is the kind that isn't pre-checked for you.