In Cover's redaction test, Alibaba Qwen 2.5 caught 66% of the 149 private details in 18 bank, tax and medical PDFs, leaked 61 and over-redacted 167. Cover caught 100%, leaked 0 and over-redacted 14. Ranked by fewest leaks and over-redactions, Alibaba Qwen 2.5 places 5th of 12 engines and Cover places 1st.