Can AI Replace Your Editor? What the Research Says

Sudowrite recently asked the question: "Can Sudowrite replace your editor?" They meant it as marketing. But it is a real question, and the research gives us a more interesting answer than any AI company's landing page.

The short version: AI can replace some editorial functions. It cannot replace others. Knowing which is which will save you money, time, and a lot of bad writing.

What We Know About AI as a Judge of Writing

Before asking whether AI can edit, we need to ask whether AI can evaluate. An editor who cannot tell good writing from bad writing is not an editor. They are a spellchecker with delusions of grandeur.

In 2023, Tuhin Chakrabarty and colleagues at Stony Brook University published a study testing exactly this. They built a 14-criteria rubric for evaluating New Yorker-style short stories. Criteria included things like character development, dialogue quality, emotional engagement, and originality. Then they asked both humans and LLMs to evaluate the same stories.

Two findings matter here. First, LLM-generated stories scored worse than human stories across every dimension. The AI could write technically competent prose, but it lacked the lived experience and idiosyncratic perspective that makes fiction compelling. We have written about why this is structural, not temporary.

Second, and this is the part most people miss: AI judges achieved high consensus with human judges. The LLMs could not write good stories, but they could reliably tell which stories were good. Their evaluations aligned with expert human ratings across most criteria.

This is the foundation of everything that follows. AI can evaluate writing. That means it can, in principle, edit. The question is how far that evaluation ability stretches.

The Jasmine Sun Experiment

Jasmine Sun is a writer and researcher who writes extensively about AI and writing. In 2025, she did something most people talk about but few actually try. She built a custom AI editor using Claude, trained on her personal rubric for good writing.

Her system was not a generic "improve my writing" prompt. She encoded specific editorial principles: what makes an opening strong, what constitutes a clear argument, where transitions tend to fail, what kinds of sentences are doing real work versus filling space. She gave the AI her own editorial taste as a set of concrete instructions.

Her verdict: the custom AI editor was "as good as many human editors I've had."

That is a striking claim from someone who works with professional editors regularly. But notice the qualifier. "Many" human editors. Not "the best." Not "all." There is a ceiling, and Sun is precise about where it is.

What AI Can Replace

Editing is not one thing. It is a stack of different skills, and AI handles some layers of that stack well.

Line Editing

Line editing is about making sentences clearer, tighter, and more effective. Can this sentence be shorter? Is that word the right word? Does the rhythm work? AI is genuinely good at this. It can spot redundant phrases, suggest more precise verbs, and identify sentences that are doing too much. This is pattern matching on a sentence level, and pattern matching is what LLMs do best.

Copyediting

Copyediting is about consistency and correctness. Are you spelling the character's name the same way every time? Did you switch from past to present tense in the third paragraph? Are your citations formatted consistently? AI handles this reliably. It can hold an entire document in context and flag inconsistencies that a human copyeditor might miss on the first pass.

Proofreading

Typos, punctuation errors, missing words, doubled words. AI catches these at near-perfect rates. This is the most straightforward editorial function, and it is the one AI does best. If you are paying a human only to proofread, you are overpaying.

First-Reader Feedback

Does this make sense? Is the opening strong enough? Did I lose you in the second section? This kind of feedback is valuable early in the writing process. AI can provide it instantly, at any hour, with no social pressure. You do not have to feel bad about sending a rough draft to an AI at 2 AM. This alone makes AI useful even if it did nothing else.

What AI Cannot Replace

Here is where it gets interesting. The functions AI cannot replace are not just "harder versions" of the functions it can. They are fundamentally different kinds of work.

Developmental Editing

Developmental editing is about whether you are telling the right story. Not whether the sentences are clean, but whether the piece should exist in its current form at all. Should this be an essay or a book? Is this the right structure for this argument? Are you burying the real story under a safer, less interesting one?

This requires understanding what you are trying to do as a writer. Not just with this piece, but with your work overall. A developmental editor who has worked with you for years knows your patterns. They know when you are playing it safe. They know when you are avoiding the hard part. AI does not have this context. It can evaluate the text in front of it. It cannot evaluate the text against the writer's larger trajectory.

Voice Development

Your voice is not your grammar. It is not your sentence length or your vocabulary. It is the accumulated effect of thousands of choices about what to include, what to leave out, how to pace, when to be direct, and when to leave things unsaid. A good editor helps you find and strengthen that voice. They notice when you are writing like yourself and when you are writing like someone else.

AI tends to flatten voice. It suggests "improvements" that make your writing cleaner but less distinctly yours. As we discussed in our piece on whether AI makes you a worse writer, research shows AI-assisted writers converge toward a similar style. Vocabularies shrink. Sentence structures become more uniform. The writing gets competent and generic. A human editor pushes in the opposite direction.

The Therapeutic Relationship

Jasmine Sun described great editors as needing "good taste, low egos, and therapeutic talents to elicit a neurotic writer's best work." That last part matters more than most people realize.

Writing is emotional. Writers get attached to sentences that are not working. They avoid topics that scare them. They resist cuts that would make the piece better because those cuts hurt. A good editor navigates this. They know when to push and when to back off. They build trust over time so the writer can hear hard feedback without shutting down.

AI has infinite patience. That is an advantage for some editorial tasks. But patience is not the same as rapport. AI will never say, "I know this is hard to hear, but the best part of this essay is the paragraph you wrote as a throwaway." It will never notice that you always hedge your strongest claims and gently challenge you to stop. It will never understand why a particular piece matters to you personally and use that understanding to help you make it better.

Taste That Evolves

A human editor's taste evolves with your work. They learn what you are trying to do over months and years. Their feedback gets more precise because they accumulate context about you as a writer. They start to anticipate your weaknesses and strengths.

AI starts fresh every session. You can give it a rubric, as Jasmine Sun did, but that rubric is static. It does not learn from your previous drafts. It does not notice that you have been getting more ambitious with structure. It does not adjust its feedback based on where you are in your development as a writer.

Sam Altman himself has acknowledged the limits. In an interview with Tyler Cowen, he said GPT-7 might produce "a real poet's okay poem." If AI cannot write great poetry, it cannot guide a poet toward greatness. The ceiling on AI generation is also a ceiling on AI's editorial ambition.

Creative Risk

The best editors push writers to take risks. Try a different structure. Cut the first three paragraphs. Write the piece you are afraid to write. This requires knowing what is safe and what is risky for a particular writer in a particular context.

AI defaults to safe. It optimizes for clarity, coherence, and correctness. Those are good things, but they are not the only things. Sometimes the right editorial advice is to make the piece messier, more personal, more uncomfortable. AI will almost never suggest this. As we explored in our piece on whether AI will replace writers, the writers who will thrive are the ones who take creative risks that AI cannot evaluate, let alone recommend.

The Best Setup

The research points to a clear division of labor. Use AI for first-pass editing. Use a human editor for developmental feedback.

In practice, this means running your draft through AI editing first. Let it catch the typos, tighten the sentences, flag the inconsistencies, and tell you where the argument gets confusing. This is the work that eats up most of an editor's time and is not the work that requires human judgment. Doing it with AI first means your human editor can spend their time on the high-value stuff: structure, voice, ambition, and the question of whether you are writing the right thing in the first place.

This is not theoretical. It is what working writers are already doing. Jasmine Sun built a custom AI editor and found it as good as many human editors for the mechanical work. She still works with human editors for the rest. The Chakrabarty research shows AI can evaluate writing reliably. It just cannot push that writing to the next level on its own.

What This Means for Writers

If you are spending money on editing, you can probably spend less. The line editing, copyediting, and proofreading that makes up the bulk of editorial work can be handled by AI. That is not a threat to the profession. It is a reallocation. The editors who are worth paying are the ones who do developmental work: the ones who change what you write, not just how you write it.

If you are not working with an editor at all, AI editing is a massive upgrade over no editing. Most writers ship first drafts because they cannot afford an editor or do not want to wait for feedback. AI removes both barriers. You can get competent editorial feedback in seconds, for free. That is genuinely transformative for solo writers, bloggers, and anyone who writes regularly without institutional support.

If you want the best possible result, use both. AI first, human second. The AI handles the floor. The human raises the ceiling. Neither can do what the other does.

The Tool Matters

One thing the Sudowrite question gets wrong: it frames AI editing as a product feature. "Can our tool replace your editor?" But the value is not in any particular product. It is in how AI editing is integrated into your writing workflow.

If you have to copy your text into a chat window, wait for suggestions, and then manually apply them back in your document, you will not use AI editing consistently. The friction is too high. The same way spellcheck only works because it is built into your editor, AI editing only works when it is built into where you write.

That means the writing tool matters. Not because one AI is dramatically better than another at catching comma splices, but because the integration determines whether you actually use it. An AI editor that lives inside your writing environment and shows you exactly what it wants to change, as tracked changes you can accept or reject, is fundamentally different from a chatbot that rewrites your paragraph in a separate window.

Athens is built around this idea. AI editing happens in the document, with diffs you can review. You keep your voice. The AI handles the mechanical work. And when you need a human editor for the deeper stuff, the draft you hand them is already clean.

The answer to "Can AI replace your editor?" is: partly. And knowing which part changes everything.