Anthropic has filed a strong opposition to major music publishers' preliminary injunction request regarding their AI chatbot Claude's alleged copyright infringement. The dispute centers on two main issues: the use of protected works in training data and the generation of song lyrics by Claude.

Key points from Anthropic's opposition:

1. Fair Use Defense

• Claims using copyrighted works to train LLMs constitutes fair use
• Argues training data usage is "transformative" under fair use doctrine
• States monetary damages would suffice if publishers prevail

2. Technical Context

• Claude learns from "trillions of tiny textual data points"
• Training data likely includes some copyrighted works
• Research details predated Claude's commercial release by nearly a year

3. Protective Measures

• Implemented "broad array of safeguards" to prevent copyright infringement
• Claims no reasonable expectation of future violations
• Disputes ongoing market and licensing harm allegations

Anthropic co-founder Jared Kaplan provided additional support through a declaration detailing Claude's training specifics. The court recently granted and denied partial redactions to the opposition filing, with some details (including compliance costs) remaining confidential.

The case (5:24-cv-03811) remains ongoing, with reports suggesting a significant portion may be dismissed in the near future. This dispute represents a crucial test case for AI training data and copyright law.

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