NC Bench
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Run: 2026-02-17-01KHMT835887665CTKCZW0MN29
Run Details
Model:
Claude Sonnet 4
Test:
Bad Writing Habits
Scenario:
Mystery: examining a crime scene
Duration:
36.7s
Cost:
$0.024921
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 bone token felt cold against Harlow's palm as she descended the rusted spiral staircase into the abandoned Camden station. Her worn leather
watch
read 2:47 AM, but time seemed irrelevant in this place where fluorescent emergency lighting cast sickly shadows across cracked Victorian tiles. The air tasted of copper and something else—something that made her tongue
feel
thick and her military-trained instincts scream warnings. "Victim's a thirty-something male, no ID," Sergeant Mills called up from the platform below. His voice
echoed
strangely in the tunnel, bouncing off surfaces that shouldn't exist. "Looks like a robbery gone wrong. Wallet's missing, no phone." Harlow's brown eyes swept the scene as she reached the platform. The body lay sprawled between two sets of tracks that hadn't seen a train in decades, arms akimbo like a discarded marionette. But something was off. The positioning was too deliberate, too staged. She'd seen enough genuine crime scenes to recognize artificial arrangement. "Who called it in?" She knelt beside the body, careful not to disturb the chalk outline Mills had already drawn. "Anonymous tip. Phone booth on Camden High Street, if you can
believe that. Who
uses phone booths anymore?" Mills scratched his balding head. "Caller said they heard screaming around midnight." Harlow checked her
watch
again. Nearly three hours ago, yet the blood beneath the victim looked too fresh, too bright. She'd learned to trust her instincts during eighteen years of service, and they were practically shrieking now. The same way they'd screamed the night Morris died, when the evidence had made no sense and the brass had wanted quick, clean answers. "Mills, look at his shoes." The sergeant squinted down. "What about them?" "No dust. No grime. This station's been abandoned for forty years, but his shoes are
pristine
." Harlow stood, brushing chalk dust from her knees. The gesture revealed something
glint
ing near the body—a small brass object partially hidden beneath a loose tile. She palmed it
quickly
, her trained fingers recognizing the
weight
and texture of old metal. A compass, but wrong somehow. The face bore strange markings that
seemed to
shift when she
wasn't looking
directly at them, and the needle spun wildly before settling on a direction that definitely wasn't
magnetic
north. "Detective Quinn?" The voice made Harlow freeze. A young woman emerged from the shadows at the far end of the platform, carrying a worn leather satchel and pushing round glasses up her freckled nose. Curly red hair escaped from a hastily tied ponytail, and she had the pale, bookish look of someone who spent more time with ancient texts than living people. "This is a crime scene, miss. You need to leave immediately." Harlow's hand moved instinctively toward her radio, but the device remained silent despite her finger pressing the call button. "Eva Kowalski, British Museum." The woman tucked a strand of hair behind her left ear, a nervous gesture that seemed automatic. "I'm a research assistant in the restricted archives. I think I might know what happened here." Mills laughed, but it sounded forced. "Another psychic, Quinn. Should I call for backup to escort her out?" Harlow studied Eva's face. Fear lurked behind those green eyes, but also knowledge. The same look she'd seen in Morris's eyes those final weeks before he died, when he'd started talking about patterns that didn't fit and evidence that defied explanation. "What do you know about this place?" Harlow asked. Eva glanced at Mills, then back at Harlow. "This isn't just an abandoned station. It's something else. Something that moves." She opened her satchel and withdrew a leather journal filled with handwritten notes and sketches. "I've been tracking disappearances in London for two years. People vanish near certain Tube stations on specific dates. Always during the new moon." "That's ridiculous," Mills interjected. "This is a straightforward robbery-homicide." But Harlow
was studying
the journal, recognizing the
methodical
documentation of someone trained in research. Dates, times, locations, witness statements—all meticulously recorded. Her detective's mind began connecting dots she hadn't seen before. "The emergency lighting," she said
suddenly
. "Mills, when did London Underground install emergency lighting in abandoned stations?" "They didn't," Mills replied
slowly
. "Budget cuts years ago meant—" "Exactly." Harlow pointed at the fixtures humming overhead. "So where's the power coming from?" Eva tucked her hair behind her ear again. "It's not a normal market. The Veil Market. It appears in different locations every full moon, selling things that shouldn't exist to people who shouldn't know about them." The brass compass in Harlow's pocket grew warm against her thigh. She pulled it out, and Eva's
eyes widened
. "Where did you get that?" "Found it near the body." The needle
was spinning
faster now, almost agitated. "What is it?" "It's a Veil Compass. Points toward supernatural rifts." Eva's voice dropped to a whisper. "Detective, your victim didn't die here. He died somewhere else entirely. This is just where his body ended up." Mills shook his head. "This is insane. Quinn, we need to stick to facts, not fairy tales." But Harlow was remembering Morris's final case, the inconsistencies that never made sense, the way evidence
seemed to
rearrange itself when no one
was looking
. The way he'd
tried to
tell her about things beyond their understanding before that final night when he'd simply vanished, leaving only a blood-stained badge and questions that haunted her dreams. The compass needle
suddenly
stopped spinning, pointing directly at a section of tunnel wall that looked solid but cast no shadow. As Harlow
watch
ed, the air
seemed to
shimmer like heat waves, and she caught a glimpse of something impossible—market stalls draped in midnight-blue fabric, figures in hooded cloaks, and the
glint
of objects that hurt to look at directly. "Mills," she said quietly, "I think we're going to need a bigger crime scene." The sergeant's face had gone pale, his confident dismissals dying on his lips as he too saw the impossible made manifest. In the distance, something howled—not quite human, not quite animal, but entirely wrong. Harlow checked her
watch
one more time. 3:15 AM, and her
carefully
ordered world was about to become much more complicated.
Evaluation details
Result
Evaluator
Details
Meta Data
0.0000%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
6
adverbTagCount
3
adverbTags
0
"she said suddenly [suddenly]"
1
"Mills replied slowly [slowly]"
2
"she said quietly [quietly]"
51.4091%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1029
totalAiIsmAdverbs
5
found
0
adverb
"carefully"
count
1
1
adverb
"quickly"
count
1
2
adverb
"slowly"
count
1
3
adverb
"suddenly"
count
2
highlights
0
"carefully"
1
"quickly"
2
"slowly"
3
"suddenly"
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)
31.9728%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1029
totalAiIsms
7
found
0
word
"glint"
count
1
1
word
"glinting"
count
1
2
word
"pristine"
count
1
3
word
"methodical"
count
1
4
word
"magnetic"
count
1
5
word
"weight"
count
1
6
word
"echoed"
count
1
highlights
0
"glint"
1
"glinting"
2
"pristine"
3
"methodical"
4
"magnetic"
5
"weight"
6
"echoed"
100.0000%
Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches
1
maxInWindow
1
found
0
label
"eyes widened/narrowed"
count
1
highlights
0
"eyes widened"
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
0
narrationSentences
56
matches
(empty)
90.0621%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
4
hedgeCount
4
narrationSentences
56
filterMatches
0
"watch"
1
"feel"
hedgeMatches
0
"seemed to"
1
"tried to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
1
totalSentences
73
matches
0
"believe that. Who"
100.0000%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
34
mean
29.97
std
18.95
cv
0.632
sampleLengths
0
65
1
37
2
54
3
20
4
30
5
61
6
5
7
7
8
41
9
51
10
2
11
60
12
30
13
37
14
18
15
41
16
9
17
58
18
9
19
32
20
17
21
10
22
14
23
36
24
19
25
5
26
16
27
33
28
17
29
56
30
60
31
14
32
34
33
21
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
0
totalSentences
56
matches
(empty)
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
4
totalVerbs
140
matches
0
"wasn't looking"
1
"was studying"
2
"was spinning"
3
"was looking"
82.3902%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
744
adjectiveStacks
0
stackExamples
(empty)
adverbCount
37
adverbRatio
0.04973118279569892
lyAdverbCount
23
lyAdverbRatio
0.030913978494623656
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
73
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
73
mean
13.96
std
8.72
cv
0.625
sampleLengths
0
20
1
25
2
20
3
14
4
13
5
10
6
11
7
22
8
4
9
7
10
10
11
20
12
23
13
7
14
5
15
15
16
17
17
24
18
5
19
4
20
3
21
24
22
17
23
15
24
5
25
31
26
2
27
5
28
27
29
28
30
30
31
21
32
16
33
6
34
12
35
4
36
9
37
28
38
9
39
8
40
27
41
23
42
4
43
5
44
15
45
7
46
10
47
6
48
11
49
5
78.5388%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
1
diversityRatio
0.4794520547945205
totalSentences
73
uniqueOpeners
35
0.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
6
fancyCount
5
fancyTags
0
"Sergeant Mills called up from the platform below (call up)"
1
"Mills interjected (interject)"
2
"she said suddenly (say suddenly)"
3
"Mills replied slowly (reply slowly)"
4
"she said quietly (say quietly)"
78.4925%