NC Bench
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Run: 2026-02-17-01KHMX13NGNAE0R410H7HM6H4G
Run Details
Model:
Claude Sonnet 4
Test:
Bad Writing Habits
Scenario:
Mystery: examining a crime scene
Duration:
51.8s
Cost:
$0.032646
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 abandoned Tube station beneath Camden reeked of damp concrete and something else—something metallic that made Quinn's teeth ache. She descended the rusted maintenance stairs, her worn leather
watch
catching on a loose rivet. The beam from her torch carved through darkness that
seemed to
swallow light, revealing graffitied walls and debris scattered across cracked platform tiles. "Bloody hell of a place to dump a body," muttered Sergeant Collins from behind her, his voice
echoing
off the curved ceiling. "How'd anyone even find this place?" Quinn paused at the platform's edge, her sharp jaw set in concentration. The victim lay sprawled near what had once been the ticket barrier, a young man in his twenties with ritual scarification covering his exposed torso. But it was the perfect circle of scorched earth around the body that made her brown eyes narrow. "Anonymous tip came in at three this morning," she said, crouching beside the corpse. Her movements carried the precise economy of her military training, each gesture deliberate. "Caller knew exactly where to send us." Collins fumbled with his notebook, squinting in the dim light. "Could be a homeless camp down here. Someone heard screaming, called it in." "No." Quinn's torch beam swept the platform methodically. "No sleeping bags, no refuse, no signs of habitation. This place is clean except for our victim." She stood, her salt-and-pepper hair catching the light as she turned toward the tunnel mouth. "And look at this burn pattern. Perfect circle, no scorch marks leading to or from it. Fire doesn't burn like that naturally." "Gas leak maybe? Underground explosion?" Quinn walked the perimeter of the burn mark, counting her steps. Twelve feet in diameter, the earth blackened to ash but contained within precise boundaries. Beyond the circle, the concrete showed no heat damage whatsoever. She knelt and touched the edge with her fingertip—cold as winter morning. "Collins, when was the last time you saw a gas explosion that burned in a perfect geometric shape and then went out without spreading?" Her sergeant shifted uncomfortably. "Well, when you put it like that..." The sound of
footsteps
on the maintenance stairs made them both turn. A figure emerged from the darkness—a young woman with curly red hair catching the light, round glasses reflecting their torch beams. She carried a worn leather satchel that
seemed to
strain under the
weight
of books, and her freckled complexion looked pale in the harsh illumination. "You can't be down here," Quinn called out, her voice carrying the authority of eighteen years on the force. "This is a crime scene." The woman paused, tucking a strand of hair behind her left ear—a nervous gesture that made Quinn's detective instincts sharpen. "I'm Eva Kowalski, research assistant with the British Museum. I study historical sites and abandoned infrastructure. I have permits for—" "Dr. Kowalski." Quinn's tone remained flat, professional. "This is a murder scene, not a historical survey. I need you to leave immediately." But Eva
was staring
at the burned circle, her green eyes wide behind her glasses. "This pattern," she murmured, setting down her satchel and pulling out what looked like a brass compass. The instrument's face caught the light, revealing
intricate
etchings around its perimeter. "It's not random." "Step back from the evidence." Quinn moved between Eva and the body, but her gaze lingered on the compass. Something about its verdigris patina and ornate markings seemed familiar, though she couldn't place where she'd seen such craftsmanship. Eva held the compass at eye level,
watch
ing its needle spin wildly before settling on a point just left of the burn mark. "Detective, this isn't an ordinary crime scene. The geometric precision, the contained burn pattern—this matches historical accounts of ritual summoning circles." "Ritual summoning." Collins snorted. "Right. And I suppose the devil did it." But Quinn
was studying
the compass,
watch
ing how its needle
trembled
and shifted. The instrument reminded her of something—a case from three years ago, when her partner Morris had been investigating strange deaths in Whitechapel. He'd mentioned unusual evidence, geometric patterns that defied explanation. Two days later, she'd found him in an alley with the same vacant stare as the corpse at her feet. "Where did you
get that compass
?" Quinn's voice carried an edge that made Eva step back. "It's a specialized instrument for detecting electro
magnetic
anomalies in historical sites." Eva's fingers tightened on the brass casing. "The etchings are protective sigils from medieval manuscripts." Quinn studied the young woman's face, noting the way she avoided eye contact when discussing the compass. Research assistants at the British Museum didn't typically carry instruments covered in occult symbols, and they certainly didn't show up at crime scenes in abandoned Tube stations at four in the morning. "Collins, I need you to canvas the area above ground. Look for witnesses, security cameras, anything that might show how our victim ended up down here." "Shouldn't I stay with you, Detective?" "Now, Sergeant." Collins glanced between Quinn and Eva, then shrugged and headed for the stairs. His
footsteps
faded into the darkness above, leaving them alone with the corpse and the smell of burnt earth. Quinn moved closer to Eva, her brown eyes fixed on the compass. "That needle isn't pointing toward
magnetic
north." "No." Eva's voice was
barely above a whisper
. "It points toward sources of supernatural activity." "Supernatural." Quinn kept her tone neutral, professional, but her pulse quickened. "And what exactly would that detect in a place like this?" Eva gestured toward the tunnel mouth, where her compass needle now pointed steadily. "This station was abandoned in the 1960s, but the locals have stories about it. They call it a thin place—somewhere the barriers between worlds grow weak." She tucked hair behind her ear again. "If someone wanted to perform a summoning ritual, to call something through from another realm, this would be the perfect location." Quinn followed Eva's gaze into the tunnel's black mouth. Three years ago, Morris had mentioned thin places, dimensional barriers, impossible things that made rational police work seem inadequate. She'd dismissed it as stress-induced paranoia until she found his body. "Show me what your compass detects," Quinn said quietly. Eva raised the instrument,
watch
ing its needle swing toward the tunnel entrance. "There's a strong reading about fifty meters down the northbound track. Whatever happened here, it left traces." Quinn drew her torch and started walking. Her
footsteps
echoed
off the tunnel walls as she moved deeper into darkness, Eva following close behind. The compass needle grew more agitated with each step, spinning wildly before snapping back to point ahead. They found the second burn circle exactly where Eva predicted—another perfect geometric pattern scorched into the tunnel floor. But this one was different. Larger. And at its center sat a small object that made Quinn's breath catch. Morris's warrant card, three years missing, lay in the exact center of the burn mark. Quinn knelt and picked up the card with trembling fingers. Her partner's photograph stared back at her, the plastic warped by intense heat but still recognizable. She turned to find Eva
watch
ing her with something that might have been sympathy. "He was investigating this place, wasn't he?" Eva asked
softly
. "Three years ago." Quinn's voice was hoarse. "He kept talking about impossible things, evidence that didn't make sense. I thought he was having a breakdown." Eva's compass spun frantically now, its needle unable to find purchase on any single direction. "Detective, I think your partner found something down here. Something that killed him and brought him back wrong." Quinn stood
slowly
, Morris's warrant card clutched in her fist. The rational part of her mind rejected what Eva
was suggesting
, but the detective in her recognized a pattern when she saw one. Two crime scenes, three years apart, connected by impossible evidence and her partner's badge. "What are you not telling me about that compass?" Quinn asked. Eva met her eyes finally. "It was crafted by someone who understands how to
navigate
between worlds. Someone who trades in things that shouldn't exist." She paused. "There's a market that moves through the city's forgotten spaces. They sell items like this to people who need them." "A black market." "The Veil Market. And if you want answers about what happened to your partner, about what's happening to this city, that's where you'll find them." Quinn looked down at Morris's warrant card, then back at the impossible burn patterns. Eighteen years of police work had taught her to follow evidence wherever it led, even into darkness that defied rational explanation. "When does this market next appear?" Eva checked her compass one more time,
watch
ing its needle settle on a new heading. "Tomorrow night. Full moon."
Evaluation details
Result
Evaluator
Details
Meta Data
38.0952%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
7
adverbTagCount
2
adverbTags
0
"she murmured, setting down her satchel and pulling out what looked like a brass compass [like]"
1
"Quinn said quietly [quietly]"
79.4097%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1457
totalAiIsmAdverbs
3
found
0
adverb
"slowly"
count
1
1
adverb
"softly"
count
1
2
adverb
"barely above a whisper"
count
1
highlights
0
"slowly"
1
"softly"
2
"barely above a whisper"
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)
31.3658%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1457
totalAiIsms
10
found
0
word
"trembled"
count
1
1
word
"intricate"
count
1
2
word
"magnetic"
count
1
3
word
"weight"
count
1
4
word
"footsteps"
count
3
5
word
"echoed"
count
1
6
word
"echoing"
count
1
7
word
"navigate"
count
1
highlights
0
"trembled"
1
"intricate"
2
"magnetic"
3
"weight"
4
"footsteps"
5
"echoed"
6
"echoing"
7
"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
73
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
1
hedgeCount
2
narrationSentences
73
filterMatches
0
"watch"
hedgeMatches
0
"seemed to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
1
totalSentences
102
matches
0
"get that compass"
100.0000%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
48
mean
30.13
std
17.3
cv
0.574
sampleLengths
0
57
1
28
2
55
3
34
4
23
5
62
6
5
7
47
8
24
9
11
10
58
11
24
12
40
13
22
14
47
15
38
16
44
17
12
18
64
19
16
20
26
21
49
22
26
23
6
24
2
25
32
26
19
27
15
28
22
29
67
30
39
31
9
32
29
33
41
34
37
35
15
36
40
37
10
38
25
39
33
40
47
41
11
42
47
43
3
44
25
45
35
46
6
47
19
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
0
totalSentences
73
matches
(empty)
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
3
totalVerbs
167
matches
0
"was staring"
1
"was studying"
2
"was suggesting"
100.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
959
adjectiveStacks
0
stackExamples
(empty)
adverbCount
29
adverbRatio
0.03023983315954119
lyAdverbCount
15
lyAdverbRatio
0.01564129301355579
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
102
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
102
mean
14.18
std
6.88
cv
0.485
sampleLengths
0
19
1
15
2
23
3
22
4
6
5
12
6
25
7
18
8
14
9
13
10
7
11
10
12
13
13
8
14
32
15
22
16
5
17
11
18
14
19
10
20
12
21
24
22
4
23
7
24
12
25
21
26
25
27
19
28
5
29
20
30
20
31
7
32
15
33
15
34
17
35
12
36
3
37
19
38
19
39
23
40
21
41
4
42
8
43
13
44
22
45
9
46
20
47
16
48
18
49
8
79.0850%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
1
diversityRatio
0.4803921568627451
totalSentences
102
uniqueOpeners
49
0.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
7
fancyCount
5
fancyTags
0
"muttered Sergeant Collins from behind her, his voice echoing off the curved ceiling (mutter echo curve)"
1
"she said, crouching beside the corpse (say, crouch)"
2
"Quinn called out, her voice carrying the authority of eighteen years on the force (call out, carry)"
3
"she murmured, setting down her satchel and pulling out what looked like a brass compass (murmur, set down pull out look like)"
4
"Quinn said quietly (say quietly)"
83.9974%