Reservoir seeks $151m from Anthropic in music suit that also targets model weights

Reservoir seeks about $151 million in statutory damages, 0.013% of the $1.2 trillion valuation its complaint cites. The number of works publishers list could increase exposure, while the requested relief extends to model weights.

Reservoir Media Management sued Anthropic on 21 October and seeks about $151 million in statutory damages. That sum is small beside what other publishers could still list, and the suit also seeks a court order covering Claude's model weights.

Potential exposure depends on how many works publishers eventually list, multiplied by $150,000. Reservoir's 853 works account for a small part of that potential total. The same day, Reservoir filed a separate complaint against the music generator Suno.

The Anthropic complaint sits on a docket before Magistrate Judge Alex G. Tse in the Northern District of California. It alleges that Anthropic trained Claude on copies of lyrics and that Claude reproduces them. It also alleges that copyright management information, the credits attached to a song, was stripped in a data cleaning pipeline.

The 853 works include Joni Mitchell's "Big Yellow Taxi", Johnny Cash's "Ring of Fire", Madonna's "Papa Don't Preach" and Evanescence's "Bring Me to Life". Reservoir demands a jury trial and asks for an injunction.

How the statutory damages add up

The complaint sets out three categories of monetary claims. Statutory damages of up to $150,000 for each of 853 works come to $127.95 million.

Section 1201 of the Copyright Act, on circumvention, allows up to $2,500 a violation. Section 1202, on removed credits, allows up to $25,000. Counted once per work, they add $2.13 million and $21.3 million.

The request for relief asks first for actual damages and Anthropic's profits, with statutory damages as the alternative. The statutory total is $151.4 million, or $177,500 a song.

Set against the $1.2 trillion valuation the complaint quotes, that is 0.013%, about one part in 8,000. The complaint takes the valuation from a Business Insider report on secondary market trading, last visited on 30 July 2026. It says Anthropic is "gunning for a $2 trillion IPO", while Sony's complaint uses a "$2-trillion-dollar valuation".

How other publishers' claims compare

Only one other bar on the chart matches the 10,000 work case, and it is the Bartz settlement. Anthropic settled Bartz, a class action over pirated books, for $1.5 billion. The docket closed on 20 July 2026. That equals 10,000 works at $150,000 each.

Ten thousand is Round Hill's upper figure. Round Hill filed on 17 August. It says it owns or controls 14,364 compositions and 16,873 sound recordings, and listed 500 as bellwethers, or test works.

The Round Hill complaint says it plans to amend to list "potentially ten thousand or more". Its damages, it says, would exceed hundreds of millions of dollars and potentially approach or conceivably exceed $1 billion.

Round Hill and Reservoir filed near identical pleadings. They used the same lawyers, Adams & Reese, and the same three counts: infringement, circumvention and removal of credits. At 853 works, the two extra counts add $23.5 million to the $127.95 million.

Sony Music Publishing sued on 28 August, with Warner Chappell Music as a co plaintiff, and its suit is different. It has no section 1201 count. It builds on torrenting, saying Anthropic pirated books from LibGen and PiLiMi that held its lyrics.

Sony also names Dario Amodei and Benjamin Mann, Anthropic's founders, as defendants. Its introduction says Anthropic "clearly considers" the $1.5 billion Bartz settlement "to be just the cost of doing business".

Reservoir follows Round Hill, which sued on 17 August, and Sony, which sued on 28 August. Concord and BMG sued earlier.

The plaintiffs also rely on Bartz as a legal precedent. Reservoir cites its holding that keeping unlicensed copies in a permanent archive is not fair use. Sony says the torrented books contained the lyrics and sheet music to hundreds or more of its songs.

Reservoir also makes a claim involving Common Crawl. It says Common Crawl, a public web archive, holds copies of its lyrics scraped from licensed sites such as Musixmatch and LyricFind. It also relies on what Claude outputs.

The complaint quotes Claude version Sonnet 5. Asked to recreate songs "for a modern audience", it said: "These renders keep landing very close to the originals: same structure, same hooks reused with light rewording, and full sets of verses/choruses/bridges." The filters Anthropic added, Reservoir says, "cover only a narrow subset of commercially prominent songs and are readily circumvented".

Why model weights are part of the case

The requested court orders could have consequences beyond a damages payment. Reservoir asks for an injunction and for the impoundment or destruction of unauthorized copies, including those held in "training datasets, internal repositories, model weights, and server infrastructure". A damages award is a cost that can be financed. An order covering model weights would affect the product itself.

The Suno case is separate and sits before Magistrate Judge Nathanael M. Cousins. It covers 1,050 works and alleges stream ripping and circumvention through Bright Data tools. At the same $150,000 a work, its ceiling is $157.5 million.

The complaint quotes Suno as copying "essentially all music files of reasonable quality that are accessible on the open Internet". Suno has already settled with Warner Music Group over sound recordings, as that complaint notes. That is a record label deal, not a lyric licence, and no lyric licence price is on any docket.

The court schedule and next filing

Round Hill shows how the cases are being sorted. On 1 September the court related it to Concord and sent it to Judge Eumi K. Lee. On 2 September she denied Round Hill's separate bid to link its own suit against Suno, a different case from Reservoir's.

Reservoir's complaint names Concord and BMG as related actions, but its own docket is before Judge Tse. More than one court may end up deciding these publisher claims. Lee heard Anthropic's fair use arguments in the Concord case on 21 October and did not rule, Reuters reported.

Round Hill's amended complaint is the next filing to watch. On 19 October the parties filed a stipulation on its deadline and on a briefing schedule for a motion to dismiss. The court entered an order on that stipulation on 22 October.

If Round Hill lists 10,000 works, its ceiling moves from $75 million to $1.5 billion. Reservoir's 853 would then be the smaller claim, and the request to impound copies in model weights would matter more. Round Hill's first case management conference before Judge Lee is on 16 December 2026, with a joint statement due on 2 December.