Key facts
- Pangram detected 92% human writing in Anthropic's 335-page S-1 filing.
- AI detection flagged some sentences as potentially AI-generated.
- The AI tool suggested light AI editing or sentence-level usage.
An analysis of Anthropic's S-1 filing, submitted for its initial public offering, found that 92% of the document was written by humans, according to AI detection service Pangram. The filing, which spans 335 pages and contains over 259,000 words, was examined for signs of AI authorship. Pangram flagged a small number of sentences and passages with a high degree of confidence as AI-generated, suggesting light editing or sentence-level AI usage rather than wholesale AI authorship.