NC Bench
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Run: 2026-02-17-01KHMR9VBNM4T1VV1W35VCF5XW
Run Details
Model:
GPT-5 Mini
Test:
Bad Writing Habits
Scenario:
Horror: alone in an eerie place at night
Duration:
50.9s
Cost:
$0.009527
Provider:
OpenAI
Model input
System
You are an expert novelist with a gift for vivid, immersive prose. You write in tight third-person limited point of view with a strong narrative voice. Your prose is clean, precise, and engaging — you favor strong verbs, concrete details, and natural-sounding dialogue. You will be given a story bible (codex) containing canonical details about characters, locations, items, and lore. Use these details to ground your writing in the established world. Stay consistent with the codex. Write only the prose of the scene. Do not include titles, chapter headings, markdown formatting, or any commentary before or after the scene.
User/Human
<codex> <character id="4412" name="Aurora Carter" aliases="Rory, Laila, Aurora, Carter, Malphora" pronouns="she/her" species="Human" storyRole="Protagonist"> <eyeColor>bright blue</eyeColor> <hair>straight shoulder-length black</hair> <height>5'6"</height> <age>25</age> <scar>small crescent-shaped scar on her left wrist from a childhood accident</scar> <description>Aurora, referred to by her friends as Rory, is cool-headed, intelligent, and known for quick out-of-the-box thinking.</description> <backstory>Born in Cardiff to an Irish barrister father (Brendan Carter) and Welsh teacher mother (Jennifer Carter née Ellis), Rory reluctantly pursued Pre-Law at Cardiff University. She fled to London at the behest of her childhood friend Eva after leaving an abusive ex named Evan. By day, Rory works part-time as a delivery person for Yu-Fei Cheung's Golden Empress restaurant. She lives in a flat above Silas' bar.</backstory> </character> <location id="861" name="The Fae Grove" aliases="Isolde's grove, Richmond grove, the Grove" realm="Earth (Fae-touched)"> <parkLocation>Richmond Park</parkLocation> <standingStones>ancient oak standing stones mark the boundary</standingStones> <timeBehavior>time moves differently — an hour inside can be minutes or days outside</timeBehavior> <flora>wildflowers bloom year-round</flora> <description>A hidden clearing that exists in a pocket between Earth and the Fae realm.</description> </location> <item id="2001" name="Heartstone Pendant" aliases="the pendant, Heartstone" type="Artifact" origin="Dymas"> <gemstoneColor>deep crimson</gemstoneColor> <chainMaterial>silver chain</chainMaterial> <size>roughly the size of a thumbnail</size> <behavior>pulses faintly with warmth when near a Hel portal</behavior> <glow>faint inner glow</glow> <description>Given to Aurora by an unknown benefactor.</description> </item> </codex> Write a fully fleshed out scene of at least 1000 words in the horror genre. A character is alone in a strange, isolated place at night. They came here for a reason, but something feels off from the moment they arrive. The wrongness builds slowly — sounds that shouldn't be there, things that move at the edge of vision, a growing certainty that they are not alone. Build tension through restraint, not through gore. Use the codex entries above as your world reference for the character and setting. Only include the prose of the scene without any markdown or commentary.
Model response
Messages
Meta
AI
Aurora felt wrongness the moment the city swallowed itself behind her. Richmond Park unfolded like a secret the moon didn't know how to keep—shallow paths, long grass, the dark bulk of the pines—but the grove was not on any map she had ever learned. The standing stones rose ahead, not carved monoliths but ancient oaks stood as slow, gnarled
sentinels
, their trunks grown into the impression of pillars. She had stood beneath them once before, in daylight, when curiosity had been a dare and the pendant had only twitched like a shy thing in her palm. Tonight the stones looked older, patient as bones, and the air that pooled between them smelled of wet earth and something else she couldn't name. She touched the Heartstone against the linen of her shirt. The silver chain whispered. The gem burned a tiny, steady warmth against her skin, a glow beneath her fingers like a heartbeat. She had trouble remembering who had given it to her—no face threaded clean through the memory, only the soft voice that said, Keep it safe—when you are near the place you should go. That voice had sent her out of the city at midnight, past the bars and the flats and the yellow pools of streetlight where the trains sighed through the dark. It was a voice she could not track and did not trust, but she was fifty steps inside the oaks now because its heat had grown from ember to ember in her palm until she could not ignore it. She checked her
watch
by habit. The display said two oh-three. She had no notion whether that meant anything here. Time, she had read somewhere in the margin of an old book she'd bought at a market, moved like a lazy animal inside places touched by the Fae. An hour here could be minutes outside. Minutes could be a lifetime. She felt the thready edge of that knowledge as a small, sharp fear under her ribs and shrugged it away like a draft. She was rational; she had argued cases in moot halls at Cardiff, had lived through evenings that turned to headaches and days that blurred into a single ledger of small, recoverable transactions. She could
think
clearly. She could leave if she needed to. She could—should—turn now. A blossom brushed her ankle. It did not tremble on any wind. The wildflowers in the grove were ridiculous and impossible, little suns and moons at her feet blooming in colors that remembered summers she'd never lived. They were alive in a way that made her step back, because they
watch
ed with their mouths closed. The pendant pulsed. Warmth, then a quickening like a small throat beginning to swallow. It was a measured beat that
see
med to draw her forward between the pillars. The trees canted like listening men; the bark had folds like old faces. To her left, near a stone carved by nature into a hollow, something scraped—a sound like nails on a slate-covered roof—and stopped as if it had
been surprised
into silence. It was nothing, she told herself. Probably a fox. Probably a branch fallen by the
weight
of an owl. Probably—then a laugh threaded the air, thin as a string and too quick to be entirely human. It had the wrong tilt. It hung upward at the end the way a child's laugh did when a trick had been played on them and they had been allowed to keep their secret. Aurora should have
been relieved
; laughter meant presence. Instead she
felt that wrongness
tighten into an almost-solid shape in her chest. Someone was here who did not belong to the e
very
day world she carried under her coat. She moved
deliberately
, counting steps like a metronome. Twenty. Thirty. The grass crinkled under her boots; dew bit into the leather. The pendant warmed again, and with the warmth came a smell like iron and lavender and something older than either. The smell nudged at the scar at her left wrist, the small crescent left by a childhood fall; she found herself rubbing her thumb over it with the absent motion of a superstition. The scar was a map of risk she knew too well: this small crescent had meant stitches and stitches had meant a story to explain. Now the pendant's heat felt keyed to that scar, the skin there a compass needle. She rounded a low stone and saw, for a moment, a pairing of shadows that made her stop. Two figures—one taller, one short—stood between saplings, ankles obscured by flowers that bent to them like listeners. They were not quite human, or perhaps they were too human; their limbs
were marked
by small wrong angles, elbows that bent a heartbeat too far, a smile that lingered after the lips stopped moving. For half a breath they were visible: pale as rain, hair like wet grasses, eyes caught and reflecting the pendant's dim red. Aurora's mouth opened; she did not speak. Her mind, trained to pick apart inconsistency and motive, catalogued detail instead: the set of the shoulders, the way a finger twitched toward her as if remembering a motion it had once rehearsed on a different stage. When she blinked, the figures folded into darkness as if a curtain had
been drawn
. The hush that followed felt deliberate—as if sound, too, was
being stewarded
here. She told herself she had
see
n flickers of hallucination before, after too many late shifts, after arguments that left her muscles braided with adrenaline. The pendant's beat was a patient justification: follow. The warmth under her palm became more insistent, a steady pressure persuading her toward the center of the grove. She walked on. Between the trunks, the light shifted, and with it the sense of direction. Her
watch
read two-oh-eight. Her phone had long ago gone quiet; she had left it tellingly turned off to avoid anyone tracking her, a small rebellion against patterns more invasive than strangers' eyes. Now the silence of the phone felt like a tether cut. She would not be able to call for help if she wanted to. That thought made rational arguments—no signal, wasted breath—slide under her skin like a cool damp. There were noises around her that the brain could not organize. Footsteps that did not rustle the grass. A scraping as of many tiny fingernails across stone. Distant, a chorus of voices that might be children and might be wind through metal, speaking with the sound of words but refusing to line up into language she could understand. The air shivered with small movements at the ends of her vision: petals turning in slow, deliberate nods; a rabbit's ear that did not belong to any rabbit she knew; a piece of bark that winked open like an eyelid. She slowed, because rushing felt like capitulation. Slow let her
think
. Slow let her
see
. The world narrowed to the pendant's glow and the shallow play of light beneath her shoes. The stones
were arranged
in a rough circle; beyond them the night quilted itself into bland commonness. Inside, e
very
thing was too sharp. The pendant brightened with a small, persistent insistence. The light it gave was not white but the color of a throat, of a fruit under pressure. It painted the nearest oak in crimson where bark might once have been gray. A shadow moved across that red bark like water. She looked up and realized the grove's canopy had knit together into a roof of leaves so dense the moon had
been smothered
. The only light came from the Heartstone and, beyond it, a collection of points that might have been eyes. She wanted to turn back. That wish was practical and uncomplicated and it folded into the plain folds of her usual life—shift work at the Golden Empress, the dry, safe edges of legal argumentation, the flat above Silas' bar where the curtains never let the sun in at the right angle. But she had come this far because something had nudged her elbow and whispered a secret she could not now un-hear. The pendant's pulse felt like a finger on the hollow of her throat: keep going. She took three steps, then four, then another, each
echoing
like a
footfall
in a cave. The foot that followed did not belong to her. The sound arrived from behind and to the right, soft as a breath. She did not turn at once. Turning risked looking into whatever
watch
ed; looking might anchor it, might anger it. From the corner of her eye, a row of wildflowers lifted their faces. They did not face the moon. They faced her. A voice said, close enough now that she could have counted the syllables, "Why have you come?" It was not spoken in words she recognized. The syntax was wrong; it came like two people answering at once, like two plants beginning to blenchedly unfurl. Her skin prickled. She opened her mouth to say a single, sensible thing—Lawyers are
very
good at saying sensible things—but the sentence that came was smaller. "I—" Her own voice was a foreign thing. It sounded wrong in the space, thin as a thread. "I don't know." That may have been the first honest thing she had said all night. The pendant's warmth flared so bright for an instant that spots of color exploded behind her eyes. In the brightness she saw them fully—a ring of shapes standing between the trunks, not blocking her but standing like plants around a hill. Some were lithe and silvered, faces like pool reflections. Others were small, with too many knees, as if a child's doll had
been remade
by someone who misremembered what a child looked like. None were ordinary. None
see
med set to harm with claws or teeth. They smiled as if they
were remembering
a joke told to them years ago and were finally reaching the punchline. In the center of their circle the ground sank. A small dip in the turf glowed blue-white for a pulse, then went dark. The pendant thrummed against her sternum with a sound she felt more than heard. She did not want to step into that hollow. She could
see
, through the small round of light, a depth like the inside of a throat where roots made a pattern that might have been letters. Her law courses told her to document, to record, to get facts. Her lungs told her to run. Her feet moved of their own accord. She put her hand into the hollow. The grass was cool. The earth smelled like a library that had
been left
wet. The pendant's warmth flooded into the soil, and the hush that had held the grove up loosened, like fingers withdrawing from a string instrument. The figures smiled wider, and the smallest of them—an outline that resolved into the impression of a child though it had no eyes she could find—took a single, slow step toward her. Aurora's rational mind supplied plausible explanations as if to comfort a child: luminescent fungus, a prankster on the internet laying out LED candles, a lucid dream. None of those felt true. There was a quality to the movement around her that made it less like being observed by animals and more like being inspected by the parts of a thing that knew you would never be recorded properly. She felt not fear,
precisely
—fear was at least honest, a clear physical line. This was wrongness with manners, curiosity with teeth she could not
see
. The pendant beat faster. The air hummed and folded; her
watch
blinked two-oh-nine, then two-oh-nine again, as if a minute refused to arrive. Before she could pull her hand out, something brushed the inside of her wrist—a touch that mapped itself against the small crescent scar. It mirrored the scar's curve, warm and deliberate, and for a breath Aurora had the sensation of
being recognized
at some deep, private seam. Someone else had left a mark the same as hers, or had read it like a book and
was tracing
the letters. In the moment the touch lingered she felt understood in a way that made her throat ache: not the raw understanding of
being known
intimately by someone who loved her, but the cold, exact knowing a predator has of prey. The touch did not yank. It catalogued. She yanked her hand back. The circle tightened. They did not shove her. They simply stepped inward and held the space with faces that looked like promises and threats at once. The Voice—voices—folded around the trees again, asking questions without shaping themselves into language she could file. The pendant sank into her palm like a pulse she could hold. Aurora
began to
laugh, a short dry sound that she
tried to
make sharp like a scalpel. Laughter was a tool she had used before to deflect and to steady. It cut through the air, and for an instant the circle of figures twitched, as if at a cut string. One of them reached a hand toward her and in that reach there was no malice she could isolate. It was a probing, like a scientist touching glass. Its fingers were cool, tipped with the translucent sheen of leaves. Her training told her to back away. Her life had taught her to run when love turned to violence, to pack and leave in the night and not look back. The pendant's heat told her another truth: if she left now, she might never know who had given it to her, or why. The grove had been patient enough to pull her to its center. It might be patient again, but patience could devastate as easily as a tidal pull. She took one step forward. The figures did not move as a herd. They shifted their
weight
the way someone turns a page. In the hush that fell, she heard, with the ridiculous clarity of an awakening, the sound of her own pulse pressing against the silver chain. It sang to them, and they listened as if listening to the only music left in the world. The pendant pulsed once, twice, and with each beat the glow expanded until for a second the grove
was lit
not by moon or star but by a small red wound at her heart. When the light receded, the hollow at her feet had grown deeper by a hair. A breeze ran through the leaves above, the first wind she had noticed since she came into the circle, and with it the scent of lavender and iron. Somewhere outside, the city continued its indifferent noise. Inside the standing stones, something had turned to look at her for a long time and was still looking when she blinked. Aurora stood
very
still and let the night examine her. She catalogued each detail with the practiced attention that had once made her a good student and then almost got her into the law: the feel of the chain against the bones of her neck, the way her scar’s crescent
see
med to hum; the small, impossible bloom of flowers that leaned toward her knees; the circle of shapes that
watch
ed without speaking. In her mouth the taste of metal came back, of blood she had not bled. A voice, close as breath and far as a canyon, said, this one belongs here. She did not answer. She could not tell if it was a sentence of fate or an observation of fact. The pendant warmed until it was too hot to keep wrapped against her palm. She wanted to leave. She wanted to run until the city swallowed her again and the flat above Silas' bar felt like a cliff to cling to. Instead she let herself be examined. If they took anything, it would not be visible scars or the shape of her bones. If they gave anything, she did not know what it might be. The grove hummed around her, a choir of things that could not yet be named, and the Heartstone beat like a compass against a world that had shifted its north. Outside the circle the night continued in its innocent ways; inside, time had already begun to tilt.
created_at
"2026-02-17T02:54:56.697882+00:00"
2/17/2026, 2:54:56 AM
model
"openai/gpt-5-mini-2025-08-07"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
6555
moderation_latency
(null)
generation_time
50361
tokens_prompt
812
tokens_completion
5161
native_tokens_prompt
742
native_tokens_completion
4671
native_tokens_completion_images
0
native_tokens_reasoning
1408
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"completed"
usage
0.0095275
router
(null)
provider_responses
0
id
"resp_0fba290d0522b020016993d84d44608195bc148be2c14dd0eb"
status
200
is_byok
false
latency
139
endpoint_id
"c4f66d01-20b0-4c27-a225-438ea22fda43"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5-mini-2025-08-07"
api_type
"completions"
id
"gen-1771296845-OoPAkacJT2ZHpfy4qKUZ"
upstream_id
"resp_0fba290d0522b020016993d84d44608195bc148be2c14dd0eb"
total_cost
0.0095275
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
0.0000%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
1
adverbTagCount
1
adverbTags
0
"A voice said, close enough now that she could have counted the syllables, [close enough]"
85.3961%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
2739
totalAiIsmAdverbs
4
found
0
adverb
"deliberately"
count
1
1
adverb
"precisely"
count
1
2
adverb
"very"
count
2
highlights
0
"deliberately"
1
"precisely"
2
"very"
100.0000%
AI-ism character names
Target: 0 AI-default names (17 tracked, −20% each)
codexExemptions
(empty)
found
(empty)
100.0000%
AI-ism location names
Target: 0 AI-default location names (33 tracked, −20% each)
codexExemptions
(empty)
found
(empty)
78.0942%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
2739
totalAiIsms
6
found
0
word
"sentinels"
count
1
1
word
"weight"
count
2
2
word
"footfall"
count
1
3
word
"footsteps"
count
1
4
word
"echoing"
count
1
highlights
0
"sentinels"
1
"weight"
2
"footfall"
3
"footsteps"
4
"echoing"
100.0000%
Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches
0
maxInWindow
0
found
(empty)
highlights
(empty)
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
0
narrationSentences
177
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
5
hedgeCount
4
narrationSentences
177
filterMatches
0
"watch"
1
"think"
2
"see"
hedgeMatches
0
"seemed to"
1
"began to"
2
"tried to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
1
totalSentences
178
matches
0
"felt that wrongness"
71.5436%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
34
mean
79.56
std
31.86
cv
0.4
sampleLengths
0
121
1
134
2
129
3
55
4
71
5
36
6
71
7
114
8
136
9
79
10
88
11
98
12
53
13
91
14
87
15
79
16
17
17
74
18
119
19
98
20
78
21
68
22
48
23
116
24
59
25
89
26
80
27
5
28
95
29
73
30
87
31
15
32
67
33
75
80.6026%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
14
totalSentences
177
matches
0
"been surprised"
1
"been played been allowed"
2
"been relieved"
3
"were marked"
4
"been drawn"
5
"being stewarded"
6
"were arranged"
7
"been smothered"
8
"been remade"
9
"been left"
10
"being observed being inspected"
11
"being recognized"
12
"being known"
13
"was lit"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
2
totalVerbs
456
matches
0
"were remembering"
1
"was tracing"
94.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
2731
adjectiveStacks
1
stackExamples
0
"lazy animal inside places"
adverbCount
101
adverbRatio
0.03698279018674478
lyAdverbCount
19
lyAdverbRatio
0.006957158549981692
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
178
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
178
mean
15.2
std
10.13
cv
0.667
sampleLengths
0
11
1
33
2
24
3
28
4
25
5
10
6
4
7
18
8
33
9
30
10
39
11
6
12
5
13
9
14
28
15
7
16
5
17
23
18
32
19
4
20
7
21
3
22
5
23
7
24
25
25
18
26
3
27
11
28
14
29
13
30
30
31
6
32
3
33
10
34
17
35
5
36
29
37
8
38
13
39
16
40
8
41
1
42
1
43
11
44
20
45
33
46
25
47
15
48
18
49
17
31.4607%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
33
diversityRatio
0.25842696629213485
totalSentences
178
uniqueOpeners
46
0.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
1
fancyCount
1
fancyTags
0
"A voice said, close enough now that she could have counted the syllables, (say, count)"
78.8881%