NC Bench
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Run: 2026-02-17-01KHN1QTP7NVRNR2PG7CZX953S
Run Details
Model:
Claude Sonnet 4
Test:
Bad Writing Habits
Scenario:
Mystery: examining a crime scene
Duration:
43.6s
Cost:
$0.027471
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="4416" name="Detective Harlow Quinn" aliases="Quinn, Detective Quinn, Harlow" pronouns="she/her" species="Human" storyRole="Antagonist"> <eyeColor>brown</eyeColor> <hair>closely cropped salt-and-pepper</hair> <height>5'9"</height> <age>41</age> <jawline>sharp jaw</jawline> <watch>worn leather watch on her left wrist</watch> <bearing>military precision</bearing> <description>A Metropolitan Police detective with 18 years of decorated service who suspects the clique is involved in criminal activity.</description> <backstory>She lost her partner, DS Morris, during a case three years ago under unexplained circumstances that had supernatural origins she doesn't yet understand.</backstory> </character> <character id="4414" name="Eva Kowalski" aliases="Eva, Evie" pronouns="she/her" species="Human" storyRole="Best Friend"> <eyeColor>green</eyeColor> <hair>curly red</hair> <height>5'4"</height> <age>26</age> <glasses>round glasses</glasses> <satchel>worn leather satchel full of books</satchel> <freckles>freckled complexion</freckles> <nervousHabit>tucking hair behind her left ear</nervousHabit> <description>Aurora's childhood friend and an occult researcher.</description> <backstory>Moved to London two years before Aurora and works as a research assistant at the British Museum's restricted archives. She holds a master's degree in Ancient History from Oxford.</backstory> </character> <location id="856" name="The Veil Market" aliases="Veil Market, the Market, underground market" realm="Earth"> <currentLocation>abandoned Tube station beneath Camden</currentLocation> <entryRequirement>bone token</entryRequirement> <schedule>moves locations every full moon</schedule> <description>A hidden supernatural black market that sells enchanted goods, banned alchemical substances, and information.</description> </location> <item id="2004" name="Veil Compass" aliases="the Compass, shadow compass" type="Tool" origin="The Veil Market"> <casingMaterial>small brass compass</casingMaterial> <faceMarkings>face etched with protective sigils</faceMarkings> <needle>points toward the nearest supernatural rift or portal</needle> <patina>casing has a patina of verdigris</patina> <creator>crafted by a Shade artisan</creator> <description>A compass attuned to supernatural energy.</description> </item> </codex> Write a fully fleshed out scene of at least 1000 words in the mystery genre. A detective arrives at a crime scene in an unusual location. Something is wrong — the evidence doesn't add up. A colleague is present, offering a different interpretation. Through careful observation and deduction, the detective begins to see what others have missed. Use the codex entries above as your world reference for characters and setting. Only include the prose of the scene without any markdown or commentary.
Model response
Messages
Meta
AI
The stench hit Detective Harlow Quinn before she'd descended halfway down the rusted maintenance ladder. Not the usual cocktail of decay and neglect that characterized London's abandoned Underground tunnels, but something else—ozone mixed with burnt copper, like the air after lightning strikes too close. Her worn leather
watch
caught on the ladder rung, and she paused to readjust it, buying herself a moment to survey the scene below. The old Camden tube station spread out beneath her in a maze of crumbling platforms and defunct railway lines, lit by harsh police floods that cast everything in
stark
relief. Crime scene tape
fluttered
in the artificial breeze created by the ventilation fans someone had hauled down here. "About time, Quinn." Sergeant Mills looked up from his notebook, his face pale in the harsh lighting. "Thought you might want to see this before the scene gets trampled by half the Met." She dropped the final few feet to the platform, her boots
echoing
in the cavernous space. Eighteen years on the force, and she'd never worked a crime scene quite like this. The victim lay sprawled near what had once been the ticket office, arms flung wide as if he'd been
dancing
. No visible wounds, no blood pooling on the grimy tiles. Just a middle-aged man in an expensive suit, face frozen in an expression of absolute terror. "Thomas Aldrich, forty-three," Mills read from his notes. "Investment banker, lives in Kensington. Wife reported him missing two days ago when he didn't come home from work." Quinn knelt beside the body, careful not to disturb the scene. The man's eyes were wide open, pupils dilated to pinpricks despite the underground gloom. His fingers
were curled
into claws, as if he'd been grasping at something that wasn't there. "Cause of death?" "That's the thing." Mills shifted uncomfortably. "Coroner's preliminary says heart failure. Complete cardiac arrest. But Quinn, this bloke was a marathon runner. Clean bill of health, no history of heart problems." She stood, brushing dust from her knees, and surveyed the wider scene. The abandoned platform str
etched
into darkness beyond the flood lights, its Victorian ironwork twisted into grotesque shadows on the tunnel walls. But something nagged at her, a detail that didn't fit the tidy narrative Mills
was constructing
. "How exactly did Mr. Aldrich end up down here?" Quinn asked, running her finger along the edge of a nearby pillar. The surface came away gritty, but underneath the grime, she felt something else—a texture that seemed almost warm to the touch. "Working theory is he was dumped. Killer brings him down here thinking the body won't be found for months, maybe years." "Then explain this." Quinn pointed to the victim's shoes—expensive leather oxfords, but the soles
were caked
with the distinctive reddish clay that marked certain areas of Hampstead Heath. "This mud is fresh, Mills. Hours old, not days. And look at the pattern." Mills leaned closer, squinting at the footwear. "What am I supposed to be seeing?" "The wear pattern. These aren't the shoes of a man who was carried. He walked here under his own power." Quinn straightened, her sharp jaw set in concentration. "More than that—he ran here. Look at the scuff marks on the toes, the way the heel is worn on the outside edge. Classic panic sprint." She
began to
pace the platform, her military bearing evident in every precise step. The pieces weren't fitting together, and after three years of cases that
seemed to
slip through her fingers like smoke, she'd learned to trust the itch between her shoulder blades that said something was deeply wrong. "Sergeant, when was this section of tunnel sealed off?" Mills flipped through his notes. "According to Transport for London, 1952. Been abandoned ever since." "Then tell me how our victim managed to get past three levels of security barriers,
navigate
a maze of tunnels in complete darkness, and end up
precisely
here without so much as a torch or mobile phone light?" The silence str
etched
between them, broken only by the distant drip of water somewhere in the tunnels. Mills opened his mouth to respond, then closed it again, his confidence visibly
wavering
. Quinn crouched near the body again, this time focusing on the victim's left hand. The fingers were stained with something dark, and when she looked closer, she could make out what
appeared to
be symbols scratched into the concrete beside his head. Not random scratches—deliberate marks, carved with desperate urgency. "Mills, get me a UV light." "Quinn, I don't think—" "Just get me the bloody light." When Mills returned with the ultraviolet lamp, Quinn played it across the concrete around the body. The scratched symbols fluoresced with an eerie blue-green glow, revealing a pattern that made her stomach clench with recognition. She'd seen similar markings before, three years ago, at the scene where DS Morris had... "Christ," Mills breathed. "What
is that stuff
?" Quinn didn't answer immediately. She was remembering Morris, remembering the way his body had
been found
in an impossible position, the way the official report had glossed over details that didn't make sense. The way her questions had
been deflected
, her investigation quietly reassigned. She played the UV light wider, and more symbols appeared on the platform around them. Not just near the body, but everywhere—covering pillars, scratched into walls, even
etched
into the rusted railway tracks. The entire abandoned station
was covered
in a network of glowing sigils, invisible to normal light. "Mills." Her voice was steady, controlled, but she could feel her heartrate climbing. "I want you to go back up top and call for a hazmat team." "Hazmat? Quinn, what aren't you telling me?" She stood
slowly
, keeping the UV light trained on the symbols. In the purple glow, she could see something else—footprints leading away from the body, but not the kind made by shoes. These were bare feet, and they didn't quite look human. "Just do it, Mills. And when you call it in, I want you to specifically request Detective Inspector
Sarah
Chen
from the Specialist Operations unit." "Never heard of her." "You wouldn't have." Quinn clicked off the UV light, plunging them back into the harsh white of the flood lamps. "She handles the cases that don't make it into the official reports." Mills hesitated, clearly wanting to ask more questions, but something in Quinn's expression warned him off. After he'd climbed back up the ladder, she found herself alone with Thomas Aldrich's corpse and the growing certainty that she
was staring
at something far worse than a simple murder. She checked her
watch
—nearly midnight. The exact time Morris had died, according to the coroner's report. The exact time when the barriers between worlds grew thin, if you believed in that sort of thing. Quinn didn't believe in much anymore. But she
was starting
to
understand that belief
wasn't always a requirement for truth. She knelt one final time beside the body, studying the victim's terrified face in the harsh light, and whispered, "What did you see down here, Thomas? What scared you to death?" In the shadows beyond the flood lamps, something
seemed to
shift and whisper back.
Evaluation details
Result
Evaluator
Details
Meta Data
100.0000%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
4
adverbTagCount
0
adverbTags
(empty)
83.3749%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1203
totalAiIsmAdverbs
2
found
0
adverb
"precisely"
count
1
1
adverb
"slowly"
count
1
highlights
0
"precisely"
1
"slowly"
60.0000%
AI-ism character names
Target: 0 AI-default names (17 tracked, −20% each)
codexExemptions
(empty)
found
0
"Chen"
1
"Sarah"
100.0000%
AI-ism location names
Target: 0 AI-default location names (33 tracked, −20% each)
codexExemptions
(empty)
found
(empty)
41.8121%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1203
totalAiIsms
7
found
0
word
"wavering"
count
1
1
word
"fluttered"
count
1
2
word
"stark"
count
1
3
word
"dancing"
count
1
4
word
"echoing"
count
1
5
word
"etched"
count
1
6
word
"navigate"
count
1
highlights
0
"wavering"
1
"fluttered"
2
"stark"
3
"dancing"
4
"echoing"
5
"etched"
6
"navigate"
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
56
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
2
hedgeCount
4
narrationSentences
56
filterMatches
0
"watch"
hedgeMatches
0
"began to"
1
"seemed to"
2
"appeared to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
2
totalSentences
76
matches
0
"is that stuff"
1
"understand that belief"
100.0000%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
38
mean
31.37
std
18.79
cv
0.599
sampleLengths
0
44
1
72
2
33
3
77
4
27
5
41
6
3
7
31
8
49
9
42
10
21
11
42
12
14
13
54
14
50
15
9
16
15
17
38
18
31
19
50
20
6
21
4
22
6
23
50
24
7
25
44
26
49
27
27
28
7
29
42
30
25
31
4
32
32
33
47
34
34
35
20
36
31
37
14
73.8095%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
5
totalSentences
56
matches
0
"were curled"
1
"were caked"
2
"been found"
3
"been deflected"
4
"was covered"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
3
totalVerbs
151
matches
0
"was constructing"
1
"was staring"
2
"was starting"
94.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
873
adjectiveStacks
1
stackExamples
0
"eerie blue-green glow,"
adverbCount
30
adverbRatio
0.03436426116838488
lyAdverbCount
9
lyAdverbRatio
0.010309278350515464
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
76
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
76
mean
15.68
std
8.17
cv
0.521
sampleLengths
0
15
1
29
2
24
3
30
4
18
5
17
6
16
7
16
8
15
9
20
10
10
11
16
12
8
13
19
14
11
15
14
16
16
17
3
18
6
19
25
20
12
21
21
22
16
23
21
24
21
25
21
26
28
27
14
28
7
29
7
30
28
31
26
32
14
33
36
34
9
35
5
36
10
37
38
38
17
39
14
40
14
41
28
42
8
43
6
44
4
45
6
46
16
47
19
48
15
49
3
77.6316%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
1
diversityRatio
0.47368421052631576
totalSentences
76
uniqueOpeners
36
0.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
4
fancyCount
3
fancyTags
0
"Mills read from his notes (read)"
1
"Mills breathed (breathe)"
2
"She knelt one final time beside the body, studying the victim's terrified face in the harsh light, and whispered, (kneel study terrify whisper)"
84.1546%