NC Bench
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Run: 2026-02-17-01KHMVN6THWP74BH8F0QS71V8E
Run Details
Model:
Claude Sonnet 4
Test:
Bad Writing Habits
Scenario:
Mystery: examining a crime scene
Duration:
38.7s
Cost:
$0.024846
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
Detective Harlow Quinn stepped off the maintenance ladder onto the cracked platform of the abandoned Camden Tube station, her worn leather boots
echoing
against the damp concrete. The beam of her torch cut through the darkness, revealing graffiti-stained walls and the skeletal remains of old advertisements. Three years of working London's strangest cases had taught her to expect the unexpected, but this scene still made her jaw tighten. The body lay crumpled beside the defunct ticket booth, a young man in expensive clothes that seemed wildly out of place in this forgotten corner of London's underground. Blood pooled beneath his head where it had struck the platform edge, but something about the positioning nagged at her. Quinn crouched beside the corpse, her sharp brown eyes cataloguing e
very
detail with military precision. "Straightforward fall, wouldn't you say?" Detective Sergeant Mills appeared from the tunnel mouth, brushing dust from his coat. "Poor sod probably got turned around exploring, slipped on the wet platform." Quinn's fingers hovered over the victim's jacket without touching. Designer wool, barely a wrinkle except where he'd fallen. No tears, no scuff marks, no dirt on the knees or palms that would suggest he'd stumbled in the dark. "When did British Transport Police call this in?" "Anonymous tip came through around six this morning. Homeless fellow, most likely, didn't want to get involved." Mills pulled out his notebook, flipping to a fresh page. "Victim is James Morrison, twenty-eight, works in finance. According to his flatmate, he never came home last night." Something metallic caught Quinn's torchlight near the victim's outstretched hand. She bent closer, careful not to disturb the scene. A small brass compass lay half-hidden beneath Morrison's fingers, its surface green with verdigris. Strange etchings covered the face—symbols she didn't recognize but that
seemed to
writhe in the shifting light. "Mills, come look at this." Her colleague ambled over, shining his own torch down at the compass. "Bit odd to be carrying antique navigation gear in the Underground, I'll give you that. Probably just a family heirloom or something picked up at Camden Market." Quinn studied the compass more closely. Its needle didn't point north—instead, it
quivered
toward the far end of the platform where the tunnel mouth gaped like an open wound. She'd seen enough strange evidence in recent years to trust her instincts, and e
very
instinct
screamed that this
was no ordinary accident. "Look at his shoes," she said, standing and directing her torch beam downward. Mills squinted at Morrison's expensive leather oxfords. "What about them?" "Bone dry. No mud, no moisture, barely any dust on the soles." Quinn walked
slowly
around the body, her torch painting
stark
shadows on the curved walls. "This platform's been dripping for decades. There's standing water in half a dozen puddles, yet somehow our victim managed to
navigate
this place without stepping in so much as a shallow pool?" "Maybe he was careful—" "In the dark? Without proper lighting?" Quinn gestured toward the victim's pockets. "No torch, no mobile with the light on. Just that compass." She moved toward the tunnel entrance, following the compass needle's direction. Her torch beam penetrated only a few meters into the blackness before
being swallowed
entirely. But there, at the
very
edge of her light's reach, something glinted. "There's more evidence down there." Mills shifted uncomfortably. "Quinn, you know we're supposed to wait for the full forensics team before—" "Since when do you follow procedure to the letter?" She was already moving toward the tunnel. "Besides, if there's more evidence, we need to secure it before some urban explorer stumbles across it." The tunnel stretched ahead, its walls slick with decades of seepage. Quinn's
footsteps
echoed
strangely, as if the sound
were being
absorbed and reflected by surfaces that shouldn't exist. Twenty meters in, she found what the compass had been pointing toward. A section of the tunnel wall had been recently disturbed. Loose bricks lay scattered on the track bed, and behind them, a narrow opening led into darkness. The air flowing from the gap carried scents that didn't belong in any abandoned subway—incense, old parchment, and something else she couldn't identify. "Mills, get over here." Her colleague's
footsteps
approached
reluctantly
. When his torch beam joined hers, illuminating the hidden entrance, he let out a low whistle. "Well, that's not on any Transport for London blueprint." Quinn knelt beside the scattered bricks, examining them
carefully
. "These weren't knocked out from inside. Look at the mortar dust—it's all on this side. Someone broke in from the tunnel." "Break-in gone wrong, then? Morrison surprises them, gets pushed?" "Maybe." But Quinn's gut told her otherwise. She played her torch over the opening again, noting scratch marks around the edges that looked almost like claw marks. "Call it in. I want a full forensics sweep, and I want the coroner to pay special attention to the head wound." As they made their way back toward the platform, Quinn found herself thinking about her partner's death three years ago. DS Morris had been investigating a series of disappearances when he'd vanished himself, found days later in impossible circumstances that the official report had blamed on a gas leak and hallucinations. But Quinn remembered the strange symbols carved into the warehouse wall, the witnesses who spoke of shadows moving independently of their owners. She glanced back at the compass still clutched in Morrison's dead fingers. The needle hadn't moved, still pointing steadily toward that hidden entrance. Whatever was behind that wall, whatever had killed this man, it
was connected
to something larger than a simple robbery gone wrong. "Quinn?" Mills
was watching
her with concern. "You've
got that look
again." She checked her
watch
—7:43 AM. In a few hours, the crime scene would be crawling with technicians and photographers, all of whom would focus on the obvious evidence while missing the patterns that connected this death to others she'd been tracking. She needed to move fast. "I'm going to make some calls," she said, already planning her next steps. There was someone she needed to talk to, someone whose research into London's hidden history might shed light on what they'd stumbled into. Eva Kowalski had helped her before, though the woman probably didn't realize it. The compass needle
trembled
as they walked past it, and Quinn couldn't shake the feeling that Morrison's death was just the beginning.
Evaluation details
Result
Evaluator
Details
Meta Data
22.2222%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
3
adverbTagCount
1
adverbTags
0
"she said, already planning her next steps [already]"
62.5117%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1067
totalAiIsmAdverbs
4
found
0
adverb
"carefully"
count
1
1
adverb
"reluctantly"
count
1
2
adverb
"slowly"
count
1
3
adverb
"very"
count
1
highlights
0
"carefully"
1
"reluctantly"
2
"slowly"
3
"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)
25.0234%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1067
totalAiIsms
8
found
0
word
"trembled"
count
1
1
word
"quivered"
count
1
2
word
"stark"
count
1
3
word
"footsteps"
count
2
4
word
"echoed"
count
1
5
word
"echoing"
count
1
6
word
"navigate"
count
1
highlights
0
"trembled"
1
"quivered"
2
"stark"
3
"footsteps"
4
"echoed"
5
"echoing"
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
53
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
1
hedgeCount
1
narrationSentences
53
filterMatches
0
"watch"
hedgeMatches
0
"seemed to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
2
totalSentences
71
matches
0
"screamed that this"
1
"got that look"
100.0000%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
31
mean
34.13
std
19.89
cv
0.583
sampleLengths
0
68
1
63
2
30
3
46
4
45
5
50
6
5
7
39
8
51
9
13
10
10
11
59
12
4
13
23
14
38
15
5
16
16
17
33
18
41
19
50
20
4
21
30
22
30
23
9
24
49
25
73
26
45
27
12
28
46
29
49
30
22
95.5975%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
3
totalSentences
53
matches
0
"being swallowed"
1
"being absorbed"
2
"was connected"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
2
totalVerbs
126
matches
0
"were being"
1
"was watching"
94.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
778
adjectiveStacks
1
stackExamples
0
"revealing graffiti-stained walls"
adverbCount
29
adverbRatio
0.037275064267352186
lyAdverbCount
14
lyAdverbRatio
0.017994858611825194
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
71
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
71
mean
14.9
std
7.75
cv
0.52
sampleLengths
0
27
1
19
2
22
3
28
4
20
5
15
6
18
7
12
8
9
9
9
10
20
11
8
12
27
13
18
14
10
15
9
16
14
17
17
18
5
19
12
20
27
21
6
22
23
23
22
24
13
25
7
26
3
27
27
28
32
29
4
30
12
31
11
32
11
33
15
34
12
35
5
36
3
37
13
38
16
39
17
40
11
41
18
42
12
43
10
44
17
45
23
46
4
47
5
48
16
49
9
98.5915%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
0
diversityRatio
0.5915492957746479
totalSentences
71
uniqueOpeners
42
8.3333%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
3
fancyCount
2
fancyTags
0
"she said, standing and directing her torch beam downward (say, stand direct)"
1
"she said, already planning her next steps (say, already plan)"
82.7223%