No, courts so far in the jurisdictions which have heard such cases, have ruled it's fair use. There is plenty of ongoing litigation in many jurisdictions, so it's way too early to just decree "it's been determined". It likely won't be for years to come.
Why did Anthropic settle with authors for 1.5 billion then? Surely their lawyers must have decided there's a pretty good chance of judges ultimately deciding that it is copyright infringement?
What does that matter? They were sued and the group suing them accepted at $1.5B settlement instead of something theoretically much larger and precedent-setting.
Because the judge ruled that using the books for training was "fair use". The issue was Anthropic downloading and storing pirated content and there is quite a bit of precedent regarding that already...
