Major music publishers Concord and UMPG have filed a 33-page response opposing Anthropic's second attempt to dismiss their copyright infringement lawsuit. The case centers on alleged unauthorized use of song lyrics in Anthropic's AI chatbot Claude's training and outputs.

Key points from the publishers' response:

• Anthropic's dismissal motion is procedurally improper, filed before formally answering the lawsuit
• Publishers argue Anthropic is attempting to gain litigation advantage by avoiding admission of key facts
• The response defends claims of secondary infringement, stating publishers don't need to specify every instance of infringement
• Publishers maintain they need discovery access to understand the full scope of Claude's usage of copyrighted lyrics

The publishers argue Anthropic will have to eventually admit to:

• Copying lyrics during Claude's training process
• Failing to remove copyrighted lyrics from training data despite having the ability to do so

This development comes amid an ongoing push for a preliminary injunction to block Anthropic from using lyrics in both outputs and future AI training. The case highlights growing tensions between AI companies and content creators over copyright issues in AI training data.

The lawsuit, which has already undergone multiple developments including a venue change, is tentatively scheduled for trial in 2026. The outcome could set important precedents for AI training and copyright law.

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