NC Bench
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Run: 2026-02-17-01KHMZ17HBWMRPJ59CXCQTQKAY
Run Details
Model:
Claude Sonnet 4
Test:
Bad Writing Habits
Scenario:
Thriller: chase through city streets
Duration:
35.5s
Cost:
$0.024546
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="4417" name="Tomás Herrera" aliases="Tommy, Tomás, Herrera" pronouns="he/him" species="Human" storyRole="Support"> <eyeColor>warm brown</eyeColor> <hair>short curly dark brown</hair> <height>5'10"</height> <age>29</age> <skinTone>olive skin</skinTone> <scar>scar running along his left forearm from a knife attack</scar> <medallion>Saint Christopher medallion around his neck</medallion> <birthplace>Seville, Spain</birthplace> <description>A former paramedic who provides off-the-books medical care for the clique.</description> <backstory>Born in Seville, Spain. He moved to London to work for the NHS but lost his license after administering unauthorized treatments to supernatural patients.</backstory> </character> <location id="854" name="The Raven's Nest" aliases="the Nest, Raven, Silas' bar" realm="Earth"> <signColor>distinctive green neon sign above the entrance</signColor> <secretRoom>hidden back room accessible through a bookshelf, used for clandestine meetings</secretRoom> <description>A dimly lit bar in Soho, London. The walls are covered with old maps and black-and-white photographs.</description> </location> <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> </codex> Write a fully fleshed out scene of at least 1000 words in the thriller genre. A detective is pursuing a suspect through rain-soaked city streets at night. The chase takes them from the street level down into an underground market. The detective must decide whether to follow the suspect into unfamiliar and potentially dangerous territory. 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 pressed her back against the brick wall of the alley, rain streaming down her face as she
watch
ed Tomás Herrera duck through the shadows fifty meters ahead. Her worn leather
watch
caught the dim streetlight—11:47 PM. She'd been tailing him for three hours through the maze of Soho's rain-slicked streets, ever since he'd left The Raven's Nest carrying a leather satchel that hadn't been there when he'd arrived. The storm had turned the city into a watercolor painting, neon signs bleeding their colors across the wet pavement. Quinn's service boots splashed through puddles as she quickened her pace, keeping to the walls where the shadows ran deepest. Herrera moved with purpose, checking over his shoulder every few steps, his Saint Christopher medallion catching occasional flashes of light from passing cars. Quinn had been building a case against the group that frequented The Raven's Nest for months. Her superiors called it paranoia, the lingering effects of losing Morris three years ago. They didn't
understand that Morris
hadn't simply died—something had torn him apart in ways that defied explanation, left him a broken shell of a man who spoke in whispers about things that shouldn't exist. The official report called it a psychotic break. Quinn knew better. Herrera turned left onto a narrow street lined with shuttered shops. Quinn counted to five before following, her hand instinctively moving to the grip of her Glock. The former paramedic had always struck her as the nervous type during her surveillance, constantly fidgeting with that medallion, glancing around like a man expecting trouble. Tonight felt different. Tonight he moved like someone with a destination. The rain intensified, drumming against fire escapes and overflowing gutters. Quinn's closely cropped hair
was plastered
to her skull, water running down the sharp line of her jaw. She wiped her eyes and quickened her pace as Herrera's silhouette
began to
fade into the storm. He stopped abruptly at what
appeared to
be a dead end—a narrow passage between two Victorian buildings that looked like it led nowhere. Quinn pressed herself into a doorway,
watch
ing as Herrera glanced around one final time before disappearing into the passage. She waited thirty seconds, then followed. The passage opened into a small courtyard dominated by what looked like a maintenance entrance to the Underground. Heavy metal doors were set into the ground at an angle, secured with chains that should have
been rusted
solid after decades of London weather. Instead, they gleamed dully in the rain, as if they'd been recently maintained. Quinn crouched behind a collection of wheelie bins,
watch
ing as Herrera produced something from his pocket—small, pale, roughly the size and shape of a domino. He pressed it against a section of the chain, and the metal links simply fell away, clattering to the wet ground with a sound like breaking bells. The former paramedic lifted one of the heavy doors as if it weighed nothing, revealing a set of stairs descending into absolute darkness. Before disappearing inside, he turned and looked directly at Quinn's hiding spot. Even through the rain and shadows, she could see his warm brown eyes reflecting an impossible amount of light. "I know you're there, Detective," he called
softly
, his Spanish accent more pronounced than usual. "The question is whether you're brave enough to follow." Quinn's
blood went cold
. She rose
slowly
from behind the bins, her hand on her weapon, water streaming from her jacket. "Tomás Herrera, you're under arrest for—" "For what?" He smiled, but there was no humor in it. "Following a path you've been walking toward for three years? Looking for answers about what
really
happened to DS Morris?" The mention of her partner's name hit Quinn like a physical blow. She stepped forward, her military bearing keeping her spine straight despite the fear crawling up from her stomach. "What do you know about Morris?" Herrera's expression softened
slightly
. "More than you might think. And less than you need to know." He gestured toward the open entrance. "The Veil Market moves every full moon, Detective. Tonight's your only chance for answers." Quinn had heard whispers of something called the Veil Market during her investigation—fragments of conversations, coded references in text messages she'd intercepted. Her informants either claimed ignorance or went
suddenly
quiet whenever she pressed for details. Now she stood at its threshold, rain washing over her like a baptism into something beyond her understanding. "This is police business," she said, though her voice lacked conviction. "I'm ordering you to surrender that bag and come with me." Herrera shifted the leather satchel to his other shoulder, the movement causing his shirt to ride up
slightly
, revealing the pale scar that ran along his left forearm. Quinn had seen similar scars during her investigation—all of them on people connected to The Raven's Nest, all of them claiming no memory of how they'd
been wounded
. "Some things are bigger than police business," he said. "Some truths exist beyond the jurisdiction of Scotland Yard." He began descending the stairs, his voice
echoing
strangely in the enclosed space. "But the choice is yours, Detective. You can follow me and learn what
really
happened to your partner, or you can go home to your flat and spend another sleepless night wondering if you're going mad." Quinn stood at the edge of the entrance, rain pooling around her boots. The stairs descended into darkness so complete it
seemed to
swallow light rather than simply lacking it. Every instinct screamed at her to call for backup, to follow proper procedure, to retreat and regroup with a tactical team and proper equipment. But Morris's broken voice
echoed
in her memory—his rambling about shadows with teeth and doorways that led to impossible places. Three years of nightmares, three years of unanswered questions, three years of her superiors looking at her with the same mixture of pity and concern they'd once reserved for her partner. Quinn checked her
watch
one final time—11:52 PM. Eight minutes until midnight. Eight minutes until the full moon reached its peak overhead, hidden though it was by storm clouds and the city's electric glow. She drew her Glock, holding it low and ready, and stepped onto the first stair. The metal rang hollow under her boots as she descended into darkness, following a suspect deeper into London's hidden arteries, toward answers that might destroy everything she thought she knew about the world. The heavy door swung shut above her with a sound like a coffin closing.
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
"he called softly, his Spanish accent more pronounced than usual [softly, more]"
35.7798%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1090
totalAiIsmAdverbs
7
found
0
adverb
"slightly"
count
2
1
adverb
"slowly"
count
1
2
adverb
"softly"
count
1
3
adverb
"suddenly"
count
1
4
adverb
"really"
count
2
highlights
0
"slightly"
1
"slowly"
2
"softly"
3
"suddenly"
4
"really"
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)
81.6514%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1090
totalAiIsms
2
found
0
word
"echoed"
count
1
1
word
"echoing"
count
1
highlights
0
"echoed"
1
"echoing"
100.0000%
Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches
1
maxInWindow
1
found
0
label
"blood ran cold"
count
1
highlights
0
"blood went cold"
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
0
narrationSentences
57
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
2
hedgeCount
3
narrationSentences
57
filterMatches
0
"watch"
hedgeMatches
0
"began to"
1
"appeared to"
2
"seemed to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
1
totalSentences
64
matches
0
"understand that Morris"
54.8358%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
23
mean
47
std
16.07
cv
0.342
sampleLengths
0
71
1
62
2
75
3
64
4
45
5
48
6
56
7
52
8
54
9
24
10
27
11
31
12
36
13
36
14
54
15
22
16
56
17
67
18
54
19
51
20
34
21
48
22
14
98.2456%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
3
totalSentences
57
matches
0
"was plastered"
1
"been rusted"
2
"been wounded"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
0
totalVerbs
167
matches
(empty)
100.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
949
adjectiveStacks
0
stackExamples
(empty)
adverbCount
34
adverbRatio
0.03582718651211802
lyAdverbCount
17
lyAdverbRatio
0.01791359325605901
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
64
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
64
mean
16.89
std
8.24
cv
0.488
sampleLengths
0
30
1
9
2
32
3
19
4
20
5
23
6
16
7
14
8
34
9
8
10
3
11
11
12
16
13
26
14
3
15
8
16
10
17
18
18
17
19
23
20
19
21
6
22
18
23
25
24
13
25
25
26
27
27
23
28
12
29
19
30
15
31
9
32
4
33
17
34
6
35
11
36
20
37
12
38
18
39
6
40
4
41
18
42
14
43
22
44
14
45
18
46
11
47
11
48
28
49
28
61.4583%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
4
diversityRatio
0.40625
totalSentences
64
uniqueOpeners
26
8.3333%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
3
fancyCount
2
fancyTags
0
"he called softly, his Spanish accent more pronounced than usual (call softly, accent more)"
1
"she said, though her voice lacked conviction (say, lack)"
80.1486%