GPT-5.6 Terra's Spanish review demonstrated several qualities that made it exceptionally actionable: (1) specificity: each suggestion included the exact original phrase and replacement, (2) justification: each change was explained ('too insensitive', 'institutional jargon'), (3) alternatives: multiple options were provided for some changes, (4) prioritization: changes were categorized as essential vs optional — compared to typical human text feedback ('this part sounds awkward'), Terra's review had zero ambiguity — Sonnet 5 could apply all changes without asking any follow-up questions, enabling the 11-minute turnaround