Who owns the words that trained AI? Courts are still figuring it out
A $1.5 billion ruling against Anthropic and a string of unresolved lawsuits show just how far copyright law is from catching up with the technology reshaping publishing.
Key points
- Judge William Alsup ordered Anthropic to pay a $1.5 billion copyright settlement to authors in 2024, but ruled that AI training itself was lawful.
- U.S. copyright law has not been updated since 1976, leaving courts to apply 50-year-old rules to AI.
- A separate ruling found that fully AI-generated works cannot be copyrighted under current law.
- Most major AI copyright cases remain in active litigation, with no final resolution in sight.
Every time you use a chatbot like ChatGPT or Claude, you are talking to a system that learned from an enormous library of text: hundreds of millions of books, news articles, and academic papers scraped from the internet. Most of the authors whose words filled that library never agreed to it. Many do not even know it happened.
So is that illegal? First reported by TechCrunch AI, the honest answer is: nobody knows yet.
What have the courts actually decided?
The rulings so far point in different directions, and none is final. In one of the first major decisions, Judge William Alsup ordered Anthropic, the company behind the Claude family of AI assistants, to pay a $1.5 billion settlement to a group of writers. That sounds like a win for authors. It was not quite that simple.
Alsup ruled that training an AI on copyrighted books is lawful. What he penalised Anthropic for was sourcing those books from illegal pirate websites. The fine was for theft of files, not for the act of learning from them.
In his written opinion, Alsup compared the way a large language model (the technology that reads vast amounts of text and learns patterns from it) ingests books to the way a human writer studies literature before finding their own voice.
A separate case drew a sharper line. When the media company Thomson Reuters sued the legal research firm Ross Intelligence for copying its content to build a competing AI-powered legal search tool, Judge Stephanos Bibas sided with Reuters. His reasoning: if you train an AI on someone else's material specifically to compete with them in the same market, that is not a fair use of their work.
"Fair use" is the legal concept that allows limited, unlicensed use of copyrighted material for purposes like criticism, parody, or education. Courts weigh several factors, including whether the new work competes directly with the original.
Does it matter who the AI competes with?
Right now, that appears to be the key question. Yes, at least for the courts deciding these cases.
Attorney Jason Henderson, founder of the IP and Media Practice at JWL International, put it plainly: if an AI company trains on your work to build a product that directly replaces you in the market, courts are leaning against that. If the trained model does something distinct, courts are more likely to find a way to permit it.
For authors, that leaves a difficult gap. Chatbots can generate entire novels on demand. Whether that counts as market competition in the legal sense has not yet been tested to a verdict.
| Case | Ruling | Year |
|---|---|---|
| Anthropic authors' settlement | Training lawful; piracy source penalised ($1.5 billion) | 2024 |
| Thomson Reuters v. Ross Intelligence | Training to compete directly ruled not fair use | 2024 |
| Thaler v. Perlmutter | Fully AI-generated works cannot be copyrighted | 2023 |
What does this mean for writers and readers?
For working authors, the current situation offers little certainty. Their books almost certainly trained at least one major AI model. Compensation is unlikely unless a court rules otherwise, and no such ruling has come.
For readers and everyday users, the practical effect is more distant. Chatbots are not going away while litigation grinds through the courts. What will change, slowly, is how AI companies source training data and whether they negotiate licences with publishers.
U.S. copyright law was last updated in 1976, long before the internet existed. Until Congress rewrites it or a higher court settles the question, every ruling is provisional.
Common questions
Can an author sue if their book trained an AI?
Yes, authors can and have filed lawsuits, but winning is hard. Courts have so far focused on how the books were obtained and whether the AI directly competes with the author, not simply on the fact that the book was used.
If an AI writes a book, who owns the copyright?
Currently, nobody. The 2023 ruling in Thaler v. Perlmutter established that a fully AI-generated work cannot be copyrighted under U.S. law, because copyright requires human authorship.
Will the law change soon?
Congress has held hearings but passed nothing yet. Real clarity will most likely come from a combination of higher-court rulings and eventual legislation, a process legal experts expect to take several more years.
