← All models GPT-6.1 Terra editing test OpenAI · Tested Oct 27, 2026 · 35s · $0.02
Four checks All in one 76/90 caught
Grammar & spelling 41/45 Repetitions 7/15 Redundancy 14/15 Consistency 14/15 79 comments · 3 extra flags
GPT-6.1 Terra's comments when asked for all 4 checks in one prompt on our 6,000-word test story, where it left it. Click a missed mistake to find it in the text. The checks come from icanwrite , a markdown editor for writers.
Missed · 14
who, not whom: subject of 'was' “whom she guessed was the owner” any other shop: the bakery is on Wharf Street “longer than any shop on Wharf Street” in to, not into “turned his uniform into the quartermaster” 'one of those who' takes a plural verb: were “one of the last binders in New England who was still” Distinctive, chapters apart: pewter “Pewter light from the tall back window” Distinctive, chapters apart: threadbare “a threadbare, flour-dusted sweater” Distinctive, chapters apart: meticulous “His records were meticulous” Distinctive, chapters apart: gleaming “a gleaming pair of shoes” Distinctive, chapters apart: sodden “carrying sodden leaves” Distinctive, chapters apart: brittle “a short, brittle sound” Distinctive, chapters apart: stubbornly “which stuck stubbornly” Close: remembered … memory “her hands remembered” began is first “the week we first began” Tomas beside him: two decades, then thirty years “for most of two decades”