Senior Correspondent covering technology and culture

Anthropic's mostly human SEC filing, according to Pangram. Pangram/BI

Anthropic's much-awaited S-1 filing landed today , revealing all sorts of interesting things about the company's plans and current finances.

But the biggest question I had wasn't "does Anthropic think that accidentally destroying humanity is a business risk?" (yes) or "how much money are they losing?" (lots) or "does it feel weird to be part of the 50% of employees who don't do the pledge to donate some of their equity for the greater good?" (still wondering — if this is you, let me know).

My question was: Did they use AI to write this thing?

To find out, I ran the whole 335-page S-1 filing through Pangram , a service that checks for signs of AI-writing. Ok, well technically I tried to run it through myself, but ran into some problems with such a massive file.…