Unsealed Briefs in Authors v. OpenAI and Microsoft Detail Key Training Data and Fair Use Battles
Newly unsealed court briefs in the landmark copyright lawsuit brought by authors against OpenAI and Microsoft have offered unprecedented insight into the legal strategies and internal deliberations regarding foundation model training datasets. The unredacted filings shed light on the mechanics of how copyrighted literature was acquired, curated, and ingested to train flagship generative models, alongside Microsoft and OpenAI's central defense that training constitutes transformative fair use under existing US copyright doctrine. The case is widely seen as a bellwether for the entire AI sector, with the potential to either solidify existing data harvesting norms or mandate sweeping licensing frameworks across commercial model development.