In Cover's redaction test, Alibaba Qwen 3 caught 76% of the 149 private details in 18 bank, tax and medical PDFs, leaked 48 and over-redacted 188. Cover caught 100%, leaked 0 and over-redacted 14. Ranked by fewest leaks and over-redactions, Alibaba Qwen 3 places 4th of 12 engines and Cover places 1st.