Transparent Peer Review at Nature: What Medical Authors Need to Know in 2026

If you submitted a paper to Nature before June 16, 2025, you had a choice. You could let Springer Nature publish your reviewer correspondence alongside the paper, or you could keep it private. That choice no longer exists. From June 16, 2025, all primary research submitted to the flagship Nature journal that is subsequently accepted for publication will have its full peer review file, including every reviewer report and every author response letter, posted online permanently. The only thing that stays private, unless reviewers choose otherwise, is the reviewers' identities.

This is a significant shift for one of the most competitive journals in science. Nature's previous opt-in transparent peer review scheme, introduced in 2020, gave authors the final say. Relatively few chose to publish their review files. The new default changes the framing entirely: the review correspondence is now public by default, and there is no mechanism to suppress it once a paper is accepted. Authors who submit to Nature in 2026 are writing their reviewer responses for two audiences, the editors and reviewers who will read them during consideration, and the researchers, journalists, and critics who may read them after publication.

What Gets Published and What Stays Private

The peer review file that Nature now publishes alongside accepted papers contains the reviewer reports from each round of review, the author response letters, and in some cases the editorial decision letters. It does not include pre-submission enquiries, internal editorial communications, or the review correspondence from manuscripts that were rejected without being sent for external review. Only papers that complete the full review process and are accepted become subject to this policy.

This distinction matters. If your paper is desk-rejected, the review correspondence is not published, because there is no review file to publish. If your paper goes through one or more rounds of review and is then rejected, that correspondence is also not published under the current policy. The policy applies at the moment of acceptance. At that point, the full file from all rounds of review becomes part of the published record, even if an earlier version of the paper was revised substantially before reaching its final form.

Reviewer identities are protected. When a reviewer accepts an invitation to review for Nature, they agree that their report may be published, but they remain anonymous unless they actively choose to sign the report. Some reviewers sign as a deliberate statement of accountability. The majority do not. Authors therefore often know what their reviewers wrote but not who wrote it, even after publication.

One practical consequence worth noting: if a reviewer wrote a sharply critical first report, that report is now permanently visible even if the authors addressed every point and the same reviewer endorsed the revised manuscript. Reviewer reports are snapshots of an evolving conversation. Readers who encounter the final published paper alongside a harsh initial review may draw inferences, fair or not, about the trajectory of the work.

Nature Is Not Alone: The Broader Landscape

Nature's June 2025 announcement made international headlines partly because of the journal's prestige, but the policy itself is not new territory in academic publishing. The BMJ adopted open peer review back in 1999, making it a pioneer that has operated this way for more than 25 years. eLife, which publishes work across the life sciences and biomedicine, has long published editorial decision letters and author responses, and has since moved further, in some configurations publishing review reports for all submissions regardless of outcome.

Nature Communications, a high-impact open-access journal within the Nature Portfolio, already made transparent peer review compulsory for all manuscripts received from November 2022 onward. The move to require TPR at Nature proper in 2025 extended the same logic to the flagship journal. Several other Nature Portfolio journals, including Nature Medicine and Nature Cell Biology, offer transparent peer review on an opt-in basis at acceptance, meaning authors are given the choice at the point of acceptance rather than having the file published by default. Nature Medicine's policy, as of 2026, still works this way: authors can elect to have the review file published, but the default is not automatic publication.

PLOS Medicine, PLOS Biology, and the broader PLOS suite of journals have offered open peer review as part of their open-science model since their founding. Royal Society Open Science publishes reviewer reports with all accepted articles. Wellcome Open Research and F1000Research publish review reports in real time alongside the submitted manuscript, a more radical model in which the paper is posted first and peer review happens openly afterwards. By 2022, Springer Nature counted more than 730 journals across the Nature Portfolio, BMJ, PLOS, and nine other major publishers as having implemented some form of open peer review. That number has grown since.

What makes Nature's 2025 change significant is not novelty but reach. Nature publishes roughly 800 to 900 original research articles per year, and its selectivity means that papers accepted there often carry wide public and media attention. Making those review files universally public adds a layer of scrutiny to some of the most high-profile findings in science.

Why This Is Happening Now

Transparent peer review sits at the intersection of several pressures that have built up in scientific publishing over the past decade. The reproducibility crisis of the 2010s revealed that published results in many fields were less reliable than the peer review process had implied, prompting calls for greater visibility into how peer review actually functions. If review reports are private, readers have no way to know whether reviewers were satisfied with the methodology, whether they raised concerns that were dismissed, or whether the review was superficial.

The rise of preprints accelerated this pressure. When a manuscript appears on bioRxiv or medRxiv before peer review, the scientific community can read and comment on it before any journal process has occurred. By the time the paper is formally published, it may have accumulated substantial post-publication commentary. In that environment, keeping the peer review correspondence private feels increasingly inconsistent.

Research integrity concerns have sharpened the argument further. Paper mills, fabricated data, and AI-generated manuscripts are harder to catch at peer review when the review process is invisible. Transparent peer review does not automatically catch these problems, but it creates a public record that allows post-publication scrutiny. If a reviewer wrote a glowing report for a paper that was later found to contain fabricated figures, that reviewer report becomes part of the accountability trail.

There is also an argument about reviewer incentives. Reviewing is unpaid labor. Publishing signed reviewer reports gives reviewers a form of public credit and a citable output. Even unsigned reports become visible as intellectual contributions. Several academic funders and institutions now recognize peer review in research assessment frameworks, which requires some form of evidence that the work was done. Published review reports provide that evidence.

How to Write Reviewer Responses Knowing They Will Be Public

Most authors have written reviewer response letters as private, functional documents: organized by reviewer and comment number, factual, sometimes terse, occasionally defensive. When those letters stay private, that approach works. When they become public, the professional tone and intellectual quality of the response matter more than they once did.

The most important shift is in how you handle disagreement. When a reviewer raises a concern that you believe is unfounded, the private response often contains some version of the authors' frustration, softened but detectable. The public response needs to be more carefully argued. If you disagree with a reviewer's interpretation, write out the substantive reason. Do not dismiss the concern with a terse note saying it falls outside the scope of the paper unless you explain why. Future readers, including reviewers of your next paper and colleagues assessing your work, will see whether you engaged with criticism seriously or deflected it.

The good news is that most authors already write professional response letters. The adjustment required is relatively small, mainly a matter of reading the draft response with a more critical editorial eye before submitting it. Think of it the way a surgeon thinks about operative notes that may be reviewed in a malpractice case: you write what you would want a thoughtful colleague to read, because eventually a thoughtful colleague might.

The Reviewer Anonymity Question

One persistent criticism of transparent peer review is that the transparency is asymmetric. Author responses become public record, but reviewer identities remain hidden unless reviewers choose to disclose. Critics argue this creates an imbalance: authors bear the reputational exposure of a published response letter, while reviewers can write whatever they like without their names attached. Whether this is a fair concern depends partly on what you think the goal of anonymity is.

The traditional rationale for reviewer anonymity is that it protects reviewers from retaliation by authors whose papers they rejected or criticized, and it allows junior researchers to review papers by senior figures without fear of career consequences. Those rationales are real. A reviewer who is a postdoctoral fellow in a small field, reviewing a paper by a well-funded laboratory head, has legitimate reasons to keep their identity private. Removing that anonymity could reduce the pool of willing reviewers in exactly the fields where the review crisis is already most severe.

Some journals have gone further than Nature on this dimension. F1000Research and Wellcome Open Research use named reviewers as part of their post-publication peer review model. The evidence from journals that have tried this is mixed. Named reviewers tend to write more diplomatic reports. Whether that diplomacy improves or degrades the quality of the feedback depends on whether the diplomatic framing masks important concerns or simply removes unnecessary harshness.

For practical purposes, medical authors submitting to Nature or Nature Communications in 2026 should assume their reviewers will remain anonymous even as their own responses go public. This is not unique to transparent peer review. It is the model that has been running at BMJ since the late 1990s, and it has not produced any evidence that authors are systematically disadvantaged by the asymmetry.

What Transparent Review Looks Like in Practice

For journals that have operated with published review files for several years, the research on what transparent review looks like in practice is instructive. An analysis of Nature Communications papers published with review files found that reviewer reports ranged widely in length and depth, from brief assessments of a few paragraphs to comprehensive methodological critiques several pages long. Author response letters showed similar variation. The quality of the peer review exchange, when visible, gave readers context for understanding which parts of the work had been most contested and which had passed without challenge.

One consistent finding from journals that have published review files is that early career researchers find them disproportionately valuable. A PhD student trying to understand what a Nature-caliber reviewer looks for in a methods section can read dozens of actual review reports from accepted papers and calibrate their expectations accordingly. This was previously impossible. The review process was invisible except to the specific authors and reviewers involved in each manuscript.

Transparent review files have also proved useful in post-publication integrity reviews. When a paper in a transparent peer review journal is later questioned, investigators can check whether the concern raised post-publication was also raised by reviewers. In some cases, reviewers did flag the eventual problem but were overruled or satisfied by the authors' explanation. In others, reviewers approved work that later turned out to be fabricated, which raises its own set of questions about peer review adequacy that would otherwise remain invisible.

How to Check Whether Your Target Journal Uses Transparent Review

Before you choose a journal for your next manuscript, add a check for transparent peer review to your standard pre-submission assessment. It is not a reason to avoid a journal, but it should inform how you prepare your submission and in particular your revision materials.

The place to look is the journal's editorial policies or peer review information page, not the general author guidelines, which often do not mention it explicitly. Most journals that practice transparent peer review use the phrases "transparent peer review," "open peer review," or "published peer review" and describe what gets released and when. Pay attention to whether the model is mandatory or opt-in. At Nature, it is now mandatory for all accepted primary research. At Nature Medicine, it is opt-in at acceptance. At Nature Communications, it has been mandatory since November 2022. The BMJ has published open peer review reports since 1999. PLOS journals and Royal Society Open Science have their own models.

If you cannot find a clear statement on the journal's website, look at a few recently published papers and check whether there is a "peer review" tab or supplementary file linked from the article page. If review files appear alongside papers in your field, the journal is practicing some form of transparent review whether or not its guidelines emphasize it.

Implications for Medical and Clinical Research Specifically

Medical research carries a dimension that is less prominent in other fields: the findings may affect patient care. If a clinical trial result is published in Nature Medicine with its full review file, readers can see how reviewers assessed the trial design, the statistical analysis, and the clinical significance claims. They can see whether concerns about generalizability or effect size were raised and how the authors responded. For clinical readers, that context is not decorative. It bears on how much weight to give the findings in their own practice.

This is particularly relevant for studies that challenge existing practice guidelines. If a high-profile trial publishes its review file and that file shows that reviewers raised substantive concerns about the trial's generalizability that the authors addressed minimally, that is information that a clinician or systematic reviewer should be able to weigh. Transparent peer review in clinical research provides a layer of context that abstract-level summaries cannot.

There is a counterargument that some authors worry about. If a reviewer raises a concern about the clinical interpretation of findings, and the authors' published response is seen as insufficient, that could complicate media coverage of the work after publication. A journalist reading the review file alongside the published paper may lead their story with the reviewer's caveat rather than the authors' conclusion. This is not hypothetical. It has happened at journals that have published review files for years. It is, on balance, a feature rather than a flaw, though authors who are accustomed to controlling their paper's public framing may find the adjustment uncomfortable.

A Practical Pre-Submission Checklist for Transparent Peer Review Journals

Most of what you need to do before submitting to a transparent peer review journal is what good authors already do. The adjustment is mainly one of explicit awareness rather than new workflow steps. Before you submit to Nature, Nature Communications, BMJ, PLOS Medicine, or any other journal operating a transparent review model, run through the following.

Confirm whether the journal uses mandatory or opt-in transparent peer review. Understand exactly what gets published and when. Brief all co-authors on the policy before the first submission, not after the first reviewer reports arrive. This matters because the first round of reviewer reports tends to be the most critical, and if co-authors respond to those reports without understanding that the response will be published, the result can be letters that would have benefited from a more careful editorial pass.

Write the cover letter with the assumption that it may also become visible, though most journals do not publish cover letters. More importantly, build in a one-day cooling-off period before finalizing any response letter. When reviewer reports are frustrating, the instinct is to respond quickly. With transparent peer review, the permanent public version of your response will be what matters, not the speed of your reply.

Finally, consider searching for published review files from recent papers in the same journal, particularly papers with methods sections similar to yours. Reading actual review exchanges from accepted papers in your target journal is the most efficient calibration available. It tells you what reviewers at that journal consistently examine, what they let pass, and how the editorial bar has been applied to work comparable to your own. This option has always existed in theory for journals practicing transparent peer review. Until recently, few authors took systematic advantage of it. That should change.

Further Reading