I’m sure there’s ongoing litigation, and better sources than this, but fair use was determined in June 2025 in a sf federal district court https://www.goodwinlaw.com/en/insights/publications/2025/06/...
Similar conclusion vs meta https://www.jw.com/news/insights-kadrey-meta-bartz-anthropic...
And the more recent $1.5B settlement did not overturn it https://www.reuters.com/world/us-judge-approves-anthropics-1...