Nearly 1.2 Lakh Authors Claim Stake in Anthropic’s Historic $1.5 Billion AI Copyright Settlement

This is the largest copyright settlement in United States history — and it is still not fully over.

On September 5, 2025, Anthropic, one of the fastest-growing artificial intelligence companies in the world, agreed to pay at least $1.5 billion plus interest to settle a class-action copyright lawsuit brought by authors whose works were used to train the company’s AI models. The deal is poised to become the largest publicly reported copyright recovery in history and marks a watershed moment in the ongoing legal battles between tech giants and creative professionals over the boundaries of intellectual property in the AI era.

Around 1.2 lakh (approximately 120,000) authors and rightsholders have now filed claims in the case — a number that reflects both the breadth of the alleged infringement and the growing awareness among writers worldwide that AI companies used their books without permission or payment. The final approval hearing has been rescheduled to May 14, 2026, with payments potentially beginning as early as mid-2026 if the court signs off.

Quick Case Snapshot

Field	Detail
Case Name	Bartz et al. v. Anthropic PBC
Case Number	3:24-cv-05417
Court	U.S. District Court, Northern District of California
Presiding Judge	Hon. Araceli Martínez-Olguín (replaced Judge William Alsup)
Filed	August 19, 2024
Named Plaintiffs	Andrea Bartz, Charles Graeber, Kirk Wallace Johnson
Defendant	Anthropic PBC (maker of Claude AI)
Settlement Amount	$1.5 billion (minimum; scalable if works exceed 500,000)
Payout Per Work	~$3,000 per eligible book
Works Covered	~482,460–500,000 books
Preliminary Approval	September 25, 2025
Claim Deadline	March 30, 2026 (now closed)
Final Approval Hearing	May 14, 2026 (San Francisco Federal Courthouse + Zoom)
Distribution Estimated	June 11, 2026 (calculations); payments from mid-2026 onward
Current Status	Awaiting final court approval; objections under review

How Did This Lawsuit Start? Three Authors vs. One of the World’s Most Valuable AI Companies

Bartz v. Anthropic is one of the major copyright lawsuits brought by authors against an AI company for using books without permission to train large language models. It was filed by nonfiction authors Charles Graeber (The Good Nurse) and Kirk Wallace Johnson (The Feather Thief) and thriller author Andrea Bartz (We Were Never Here).

What made these three authors step forward? In Andrea Bartz’s own words, her reasoning was simple: she couldn’t come up with a good enough reason not to. Seeing years of labor folded into an AI system without credit or payment felt, as she put it, “insulting and infuriating.”

The class action lawsuit alleged Anthropic AI used the contents of millions of digitized copyrighted books to train the large language models behind their chatbot, Claude. The company also bought some hard copy books and scanned them before ingesting them into its model. Anthropic has admitted to using The Pile to train Claude — The Pile is a large open-source dataset created for large language model training.

But the most explosive allegation was not about legally purchased books. These books were obtained from so-called “shadow libraries” such as Library Genesis and Pirate Library Mirror, notorious for distributing pirated content. The authors alleged that Anthropic had “committed large-scale copyright infringement” by downloading and commercially exploiting their books to train its chatbot, Claude.

What the Court Decided Before the Settlement

The legal journey took a pivotal turn in June 2025. In June, Judge William Alsup ruled on summary judgment that training an AI model on the texts qualified as fair use because the inputs were transformed into new outputs. However, he found that retaining pirated copies in a virtual library likely violated the rights of the copyright holders, setting the stage for trial.

Related article: PharMerica Data Breach Settlement, Claim Deadline Is April 27 — Don’t Miss Out on Up to $10,000

This split ruling was significant. It meant authors could not recover damages for Anthropic legally acquiring and training on their books — but they could pursue Anthropic for pirating those books from shadow libraries. With a trial on piracy liability scheduled for December 2025 and potential statutory damages of up to $150,000 per work, with statutory damages potentially reaching $150,000 per work, Anthropic was suddenly staring down the barrel of theoretical liability exceeding $70 billion.

Both sides blinked. By late August 2025, with trial set for December, the parties announced a settlement that would eventually be preliminarily approved in September.

What the $1.5 Billion Settlement Covers

The settlement’s terms are substantial and specific. Here is what Anthropic agreed to do:

Pay $1.5 billion into a settlement fund, distributed in four installments: October 2, 2025; April 30, 2026; September 25, 2026; and September 25, 2027.

Pay approximately $3,000 per work covered by the class. If the number of affected works exceeds 500,000, Anthropic will pay an additional $3,000 per work.

Destroy all pirated copies. Filing a claim form for a work means that Anthropic will destroy all works downloaded from the LibGen or PiLiMi datasets and copies thereof.

No future license. Critically, participating in the settlement will not give Anthropic a license to use your work in the future. The release does not apply to anything Anthropic does after August 26, 2025, or any claims related to infringing outputs from Anthropic’s AI models.

Who Qualified — And Who Is Covered by the Class

The AI settlement covers all beneficial or legal copyright owners of any book in the Library Genesis (LibGen) or Pirate Library Mirror (PiLiMi) dataset versions downloaded by Anthropic. To be covered by the settlement, a book found in the applicable LibGen or PiLiMi versions must have an International Standard Book Number (ISBN) or Amazon Standard Identification Number (ASIN) that was registered with the U.S. Copyright Office within five years of publication, and was either registered before August 10, 2022, or within three months of a work’s publication.

The class is broader than just fiction authors. It includes nonfiction writers, academic and textbook authors, publishers, university presses, estates, and any legal or beneficial copyright owner. Educational, textbook, and university press and academic authors represent almost half of the close to 500,000 works infringed in the class.

For authors published through academic presses, there is a specific arrangement. The settlement includes a default 50-50 split for university press authors. University press authors who believe they should receive more than 50% can submit a claim for a higher amount along with supporting clauses from their contracts. Those claims will be reviewed by a special master assigned by the court.

The Claim Deadline Has Passed — But Here Is What Happens Next

The March 30, 2026 claim filing deadline has passed. If you did not file a claim before that date, you cannot receive payment from this settlement and are bound by its terms as a class member — meaning you cannot separately sue Anthropic for the same piracy-related conduct.

The opt-out deadline also passed in early February 2026. Authors who opted out preserved their right to sue Anthropic independently but forfeited any share of the $1.5 billion fund.

What is happening now:

On April 8, Judge Martínez-Olguín issued an order to move the Bartz v. Anthropic settlement fairness hearing to May 14, 2026, at 2:00 p.m. Class members who have timely objected and wish to be heard may join the hearing via Zoom. For anyone who might want to attend in person, the hearing will be at the San Francisco Federal Courthouse, 450 Golden Gate Ave., Courtroom 12 – 19th Floor.

After the fairness hearing, the settlement administrator will calculate distributions by June 11, 2026. Payment disbursement is expected to begin June 2026 or later, subject to change depending on whether appeals are filed.

Objections: Not Everyone Is Happy With the Deal

Some authors and literary organizations have raised significant concerns about the settlement’s fairness, which will be addressed at the May 14 hearing.

Objections include the exclusion of foreign and non-US-registered works from the class; the systematic favoring of publishers over authors; misleading and coercive class notice; inadequate compensation relative to the damage; inadequate representation and class counsel conflicts of interest; and the undercounting of copyright registrations.

Some authors argue that Anthropic, which was most recently valued at upwards of $800 billion, is largely escaping liability for the vast scope of its copyright infringement. Put differently: $1.5 billion sounds enormous — and it is the largest copyright settlement in history — but divided across nearly 500,000 works, the per-work payout of roughly $3,000 represents a small fraction of the statutory damages that could have been awarded at trial.

One particularly pointed objection came from Professor Lea Victoria Bishop, who raised concerns about transparency — specifically that certain concerns raised by the original judge were allegedly not communicated to his replacement. In response to a motion from objector Professor Bishop, Judge Martínez-Olguín ordered that her objection and those of other objectors be unsealed, allowing greater transparency around objections before the court decides whether to grant final approval.

Why This Case Changes the AI Industry Forever

“This settlement sends a powerful message to AI companies and creators alike that taking copyrighted works from these pirate websites is wrong,” said Justin Nelson, an attorney for the plaintiffs.

The settlement emphasizes the need for AI companies to move toward a licensed, permission-based access business model. This is the core industry implication: every major AI company watching this case now knows that downloading books from shadow libraries to train their models creates legal exposure that cannot be excused by the fair use defense.

The case also clarified an important legal boundary. Training on legally obtained books may qualify as fair use — a significant win for AI companies. But piracy is piracy, and courts will not extend fair use protection to cover the unauthorized downloading of millions of books from illegal repositories, regardless of the transformative AI application that follows.

When Anthropic agreed to pay $1.5 billion to settle a copyright lawsuit in August 2025, it became the largest copyright settlement in U.S. history. Three authors had sued, but nearly half a million ended up in the class.

Frequently Asked Questions

Is the Bartz v. Anthropic settlement real?

Yes, completely. The case is filed in the U.S. District Court for the Northern District of California, case number 3:24-cv-05417. Preliminary approval was granted September 25, 2025. The final approval hearing is scheduled for May 14, 2026. The official settlement website is AnthropicCopyrightSettlement.com, administered by JND Legal Administration.

Can I still file a claim or opt out? 

No. The deadline to exclude yourself passed on February 9, 2026. The claim filing deadline was March 30, 2026. Both have now passed. If you were a class member and did neither, you remain bound by the settlement but may or may not receive payment depending on your claim status.

How much will authors actually receive per book? 

The settlement is designed to pay approximately $3,000 per eligible work. Attorneys’ fees of up to 25% of the $1.5 billion fund plus administrative costs will be deducted before distribution. Class counsel’s request for attorneys’ fees is up to 25% of the Settlement Fund. Service payments of up to $50,000 each will go to the three named class representatives.

Does accepting the settlement give Anthropic permission to use my books in the future?

 No. Participating in the settlement will not give Anthropic a license to use your work in the future, and the release does not apply to anything Anthropic does after August 26, 2025.

What happens if the court does not grant final approval at the May 14 hearing?

If the court rejects the settlement — which is unlikely but possible given the volume of objections — the case would return to litigation, potentially heading toward the originally scheduled December 2025 trial on piracy liability. Both sides would face significant uncertainty. This outcome is considered unlikely given that the settlement has already received preliminary approval.

Does this settlement cover authors outside the United States? 

This is one of the major objections raised by some class members. The class definition as currently structured focuses on works registered with the U.S. Copyright Office, which largely excludes foreign authors whose works were not registered in the United States — even if those works were pirated from the same shadow libraries. This issue may be addressed at the May 14 fairness hearing.

Last Updated: April 19, 2026

This article is for informational purposes only and does not constitute legal advice. Anthropic has denied all wrongdoing. The settlement is not an admission of liability, and no final court determination of infringement has been made. All settlement terms are subject to final court approval at the May 14, 2026 fairness hearing. For the most current information, visit AnthropicCopyrightSettlement.com or contact the settlement administrator at [email protected] or 877-206-2314.