Why won’t ChatGPT write like Hemingway anymore?

Sometime in the last week of July, ChatGPT stopped writing like Ernest Hemingway. Not gradually, and not with an announcement. Ask for a paragraph of rain in Hemingway’s style and it declines the name — courteously, with an offer attached: it can write “short, declarative sentences,” it says, “a spare, understated register.” The adjectives circle the author without landing. The same happens for Stephen King, for John Steinbeck, for Agatha Christie — the four names Euronews cited when it reported the change on July 30. User forums had noticed days earlier.

Two things make this stranger than the usual platform weather. First, its reach: the refusals cover the living and the dead alike. King is alive; Hemingway has been gone since 1961, and his earliest books have already entered the American public domain. The policy does not distinguish. Second, its silence: there was no changelog to point to, no company post. The behavior arrived the way model behavior tends to arrive now — discovered by users, then confirmed by the press. What users felt was the small shock of a tool changing its mind about work it had done cheerfully for years. “Write it like Hemingway” was never an exotic request. It was one of the first things anyone typed.

Why would a company retire something people demonstrably use? OpenAI has not said — none of the coverage we have seen carries an on-the-record explanation — and we will not pretend to read minds. What can be described is the weather the decision was made in. The New York Times sued OpenAI in December 2023 over the use of its journalism in training, and that case is still going. The Authors Guild, joined by a roster of well-known novelists, brought a class action the same autumn. And in 2025, Anthropic — the company behind Claude — settled with authors over books pirated into its training library, a settlement reported at a billion and a half dollars. Nobody who builds these systems plans to walk into 2027 without lawyers.

Here is the part worth being precise about, because it is routinely garbled: style is not property. American copyright protects particular expression — these sentences, this scene, a character drawn specifically enough — and it has never protected a way of writing. Nobody owns the short declarative sentence. Nobody owns free indirect discourse, or the withheld feeling, or the em-dash. If style were ownable, half of the twentieth century would owe royalties to the other half. The lawsuits above are about inputs and outputs — what the models were fed and what they reproduce — not about cadence as such.

So the refusals are not something a court ordered; no coverage we have seen points to a ruling or a settlement term that requires them. The reading in the press was simpler and more corporate: an output that arrives wearing an author’s name is the kind of exhibit a plaintiff’s lawyer clips and files, whatever the law of style says. Refusing a name is cheap. Explaining one to a jury is not. And when a generalist retreats, it retreats by category — every author, every era, the dead with the living — because a category is the only thing that can be enforced at the scale of a hundred million users. The blanket is the point. Nuance does not ship.

One company’s policy is not an industry standard, and it is not law. As of this writing, the other two major assistants take the commission without complaint. We ask all three the same plain requests — a paragraph in the style of a named author, living and dead — and write down what happens.

This house was built on the assumption that the generalists would eventually walk away from this work — though we guessed they would lose interest before they lost nerve. Either way, the bet is the same. To a general assistant, “write like Hemingway” is one request among millions, answered by a model tuned to be adequate at everything, and whether it answers at all is a policy decision made a long way from the page. To a specialist, the style is the product, so the style gets the engineering.

What that means here, concretely. Iceberg, the first voice of the house, is built from close mechanical study of the Hemingway that belongs to everybody — the public-domain corpus. We measured it before we imitated it. Median sentence: six words. Sixty-nine percent of sentences run eight words or fewer. Semicolons: 0.7 per thousand words, which is to say almost never. Parentheses: effectively absent. Feelings are not named while they are happening; they are carried by objects, weather, and what people do with their hands. The working voice is engineered to those numbers — a system of rules, examples, and calibrations against parody, tuned by hand against that same public-domain corpus. We say it this way because the difference between a specialist and a costume is measurement.

And the specialist refuses things too — different things. Iceberg will not fake a “lost” Hemingway letter, sign his name, or manufacture an endorsement. It is homage with the label showing: named for the method — the iceberg theory, seven-eighths under water — not for the man, whose name appears here in the small type where attribution belongs. The line we hold is not between naming an author and not naming him. It is between homage and forgery. The generalist, for now, declines the name. The house declines the fake. We think that is the line a serious reader actually cares about.

Argument is cheap and specimens are not, so here is product output — Iceberg, unedited, from the same desk you can use now. The first five messages are free and anonymous: no account, no card.