NC Bench
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Run: 2026-02-17-01KHMR68K7CS82BRR6Z64V7XP7
Run Details
Model:
Gemini 2.5 Pro
Test:
Bad Writing Habits
Scenario:
Mystery: examining a crime scene
Duration:
40.3s
Cost:
$0.039954
Provider:
Google AI Studio
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 air tasted of damp concrete and ozone, a flavour Detective Harlow Quinn associated with death in the city’s forgotten corners. Below the thrum of Camden, the abandoned Aldwych branch station was a tomb of peeling posters and Victorian tilework. Forensic lights blanched the grime, casting long,
dancing
shadows that clung to the arched columns like ghosts. DC Hayes stood near the platform edge, his shoulders hunched inside his oversized coat. He was young, eager, and saw the world in straight, predictable lines. “Ma’am,” he said, his breath fogging in the subterranean chill. “Victim was found by a tube maintenance crew doing a line inspection.” Quinn’s gaze swept the scene with military precision, cataloguing details before her eyes even settled on the body. The dust on the platform was thick, disturbed by a single set of tracks leading from a service tunnel, and the chaotic boot prints of the first responders and her own team. No sign of a struggle. No scattered belongings. Just the
oppressive
silence of a place that had
been sealed
off from the world for decades. She moved toward the source of the light, her polished shoes crunching
softly
on the grit. The victim
was propped
against the tiled wall, sitting on the cold floor as if she’d simply decided to rest for a moment. Her curly red hair was a splash of vibrant colour in the monochrome decay. Round glasses
were perched
on her nose,
slightly
askew. A smattering of freckles stood out on skin that was waxy and pale. Quinn recognized the unnerving stillness of a body that hadn’t
been moved
post-mortem. Eva Kowalski. Twenty-six. A research assistant at the British Museum. “Cause of death?” Quinn asked, crouching down but not touching anything. “That’s the thing,” Hayes said, joining her. “Forensics can’t find one. No lividity where there should be. No obvious trauma, no ligature marks, no entry wounds. It’s like she just… switched off.” Quinn’s
eyes narrowed
. She had seen this once before. Three years ago. A different disused building, a different victim. Her partner, DS Morris. The memory was a cold shard of glass under her skin. She forced it down, focusing on the here and now. “Toxicology?” “Rushed it. Came back clean. No poisons, no narcotics. Zilch.” Hayes gestured vaguely at the cavernous space. “Theory is maybe some kind of gas pocket? Bad air? But the maintenance crew was down here for an hour before they found her and they’re fine.” Quinn’s gaze fell on the worn leather satchel by the young woman’s side. It was open. A few heavy, leather-bound books spilled out, their pages filled with what looked like hand-drawn diagrams and archaic script. Not a mugging, then. A mugger would have taken the bag or at least rifled through it with more purpose. She looked at Eva’s hands. They rested in her lap, palms up. Her fingers
were curled
slightly
, not in a death spasm, but
loosely
, as if she’d just let something go. Something
was tucked
behind her left ear. Not a flower. A stray curl of that fiery red hair. A nervous habit, the file had said. Quinn looked closer at the victim’s face. Behind the glasses, her green eyes were open, staring at the vaulted ceiling. They weren't clouded with the terror of a violent end. They held a look of
profound
, vacant surprise. “She doesn’t look like she was meeting a dealer, Hayes,” Quinn said, her voice quiet but carrying in the
echoing
space. She glanced at the worn leather
watch
on her own wrist. Time of death
was estimated
four hours ago. Just before midnight. “Could have been a meet for… information? Something illegal?” Hayes offered, trying to fit the scene into a box he understood. “These old tunnels, they’re used for all sorts of things. Raves, smuggling.” Quinn didn’t answer. Her attention
was snagged
by a
glint
of metal near Eva’s outstr
etched
foot. It was small, half-hidden in the grime. She motioned to a forensics tech. “Bag that. Carefully.” The tech knelt, tweezers flashing in the harsh light. He deposited the object into an evidence bag and handed it to her. It was a compass. Small, made of brass, with a patina of green verdigris mottling its surface. It was heavy in her gloved hand, solid. But the face was all wrong. Instead of cardinals, the rim
was etched
with a series of interlocking sigils she didn’t recognize. There was no glass cover. At its center, a single, needle-thin sliver of dark, polished metal spun erratically, a frantic, silent
dance
that seemed entirely disconnected from
magnetic
north. “Some kind of antique,” Hayes commented, peering over her shoulder. “Probably picked it up at the market upstairs. Just a bit of tourist tat.” Quinn turned the compass over in her palm. The back was smooth, save for a single, complex mark that looked like a stylized key. It felt cool to the touch, unnaturally so. She remembered the file. Eva Kowalski wasn’t a tourist. Master’s in Ancient History from Oxford. Access to the British Museum's restricted archives. An occult researcher. A woman like that wouldn’t carry tourist tat. A tool, then. But for what? Her gaze lifted from the strange object and scanned the air in front of the body. She took a step forward, then another. The chill in the station wasn't uniform. Right here, about five feet in front of where Eva sat, the air was degrees colder. A pocket of deep cold that had no source. Her breath plumed more thickly. She could feel the static on her skin, the fine hairs on her arms standing on end. “Ma’am?” Hayes asked, a note of concern in his voice. Quinn held up a hand for silence. She
watch
ed the compass in her palm. The needle’s chaotic spinning intensified, a blur of motion. It
wasn’t pointing
at anything. It
was reacting
to something. Something right here, in this empty space. She thought of Morris. The way they’d found him. Sitting in a chair in that abandoned warehouse, looking out a window that had no glass. No wounds. No poison. Just that same look of vacant surprise. The coroner had called it a catastrophic coronary event. A heart attack. Quinn had never believed it. There had been a compass in his pocket, too. An ordinary one, its needle shattered. At the time, she hadn't understood. Now, she
was beginning
to. “She wasn’t waiting for a person, Hayes,” Quinn said, her voice low. She looked from the empty, cold space in the air to the victim. “She was waiting for a place.” Hayes blinked. “A place? Ma’am, we’re in it.” “No.” Quinn looked down at Eva’s hands again, at the faint traces of
crystalline
dust on her open palms, a residue forensics had likely missed, assuming it was just part of the station’s grime. “She came here with her books and her tools. She sat down, and she opened something. A door. A gate. A… rift.” The word sounded alien on her tongue, but it felt right. “This compass doesn’t point north. It points toward things like that.” She held up the evidence bag. The needle inside was a frantic, silent propeller. Hayes stared at her, his face a mask of polite confusion. He was a good detective, but his world
was made
of brick and motive and human failing. He couldn’t see the impossible geometry of the scene. “A rift? With all due respect, Detective, that sounds—” “I know what it sounds like,” Quinn cut in, her tone sharp as flint. “But look at her. Look at this place. Does any of this add up to a simple murder? There are no footprints but her own leading to that spot. There are no signs of a second party. She died of fright, the coroner will probably say. Her heart just gave out. And everyone will accept it, because the alternative is too difficult to write in a report.” Quinn’s jaw was a hard line. She saw the shape of it now. Eva Kowalski hadn’t
been murdered
. She had been looking for something. Using this Veil Compass, she had found it. She had opened a door that should have remained shut. And whatever was on the other side had looked back. It hadn't needed to touch her. All it had to do was show itself. She slipped the evidence bag into her coat pocket, an immediate and deliberate breach of protocol. This was hers now. This was Morris’s case, reopened after three years of cold, gnawing uncertainty. “Get forensics to sweep her hands for any non-native particulates,” Quinn ordered, her voice regaining its authoritative clip. “And I want every book from that satchel photographed, page by page. Get a specialist from the museum to translate the text if you have to. I don’t care if it’s gibberish. I want to know what she was reading.” Hayes nodded, scrambling to jot down the notes, the professional in him overriding the sceptic. “And the cause of death, ma’am? What do I put in the preliminary?” Quinn looked one last time at the young woman with the brilliant red hair, a scholar who had ventured too far into the footnotes of history. The compass in her pocket felt heavy, a cold
weight
of responsibility. “For now,” Quinn said, turning away from the body and heading back toward the stairs that led to the sane, sunlit world, “we’ll call it death by misadventure.”
created_at
"2026-02-17T02:52:48.223191+00:00"
2/17/2026, 2:52:48 AM
model
"google/gemini-2.5-pro"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2663
moderation_latency
(null)
generation_time
40246
tokens_prompt
923
tokens_completion
3223
native_tokens_prompt
883
native_tokens_completion
3885
native_tokens_completion_images
0
native_tokens_reasoning
1798
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"STOP"
usage
0.03995375
router
(null)
provider_responses
0
status
200
is_byok
false
latency
2663
endpoint_id
"b261d15b-95ce-4c8c-8bce-00eb0dc1ff77"
provider_name
"Google AI Studio"
model_permaslug
"google/gemini-2.5-pro"
api_type
"completions"
id
"gen-1771296727-RW0FPQCPi0ejv9D9UVqP"
upstream_id
(null)
total_cost
0.03995375
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
100.0000%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
10
adverbTagCount
1
adverbTags
0
"Quinn said, turning away from the body and heading back toward the stairs that led to the sane, sunlit world [away back]"
68.3744%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1581
totalAiIsmAdverbs
5
found
0
adverb
"carefully"
count
1
1
adverb
"loosely"
count
1
2
adverb
"slightly"
count
2
3
adverb
"softly"
count
1
highlights
0
"carefully"
1
"loosely"
2
"slightly"
3
"softly"
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)
36.7489%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1581
totalAiIsms
10
found
0
word
"crystalline"
count
1
1
word
"glint"
count
1
2
word
"oppressive"
count
1
3
word
"profound"
count
1
4
word
"magnetic"
count
1
5
word
"weight"
count
1
6
word
"dance"
count
1
7
word
"dancing"
count
1
8
word
"echoing"
count
1
9
word
"etched"
count
1
highlights
0
"crystalline"
1
"glint"
2
"oppressive"
3
"profound"
4
"magnetic"
5
"weight"
6
"dance"
7
"dancing"
8
"echoing"
9
"etched"
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 narrowed"
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
0
narrationSentences
131
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
1
hedgeCount
0
narrationSentences
131
filterMatches
0
"watch"
hedgeMatches
(empty)
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
0
totalSentences
145
matches
(empty)
100.0000%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
34
mean
46.29
std
25.2
cv
0.544
sampleLengths
0
57
1
48
2
75
3
98
4
11
5
32
6
45
7
44
8
55
9
94
10
43
11
33
12
32
13
22
14
76
15
24
16
71
17
77
18
10
19
40
20
74
21
5
22
31
23
8
24
78
25
14
26
46
27
81
28
66
29
32
30
58
31
28
32
38
33
28
77.3537%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
11
totalSentences
131
matches
0
"been sealed"
1
"was propped"
2
"were perched"
3
"been moved"
4
"were curled"
5
"was tucked"
6
"was estimated"
7
"was snagged"
8
"was etched"
9
"was made"
10
"been murdered"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
3
totalVerbs
192
matches
0
"wasn’t pointing"
1
"was reacting"
2
"was beginning"
88.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
1239
adjectiveStacks
2
stackExamples
0
"heavy, leather-bound books"
1
"single, needle-thin sliver"
adverbCount
34
adverbRatio
0.02744148506860371
lyAdverbCount
12
lyAdverbRatio
0.009685230024213076
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
145
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
145
mean
10.86
std
8.48
cv
0.782
sampleLengths
0
21
1
19
2
17
3
14
4
12
5
10
6
12
7
18
8
32
9
5
10
3
11
17
12
16
13
23
14
14
15
9
16
13
17
13
18
2
19
1
20
7
21
11
22
7
23
25
24
3
25
6
26
3
27
7
28
4
29
11
30
10
31
1
32
17
33
27
34
13
35
3
36
19
37
4
38
16
39
5
40
7
41
19
42
7
43
3
44
8
45
7
46
7
47
13
48
10
49
8
53.3333%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
11
diversityRatio
0.36551724137931035
totalSentences
145
uniqueOpeners
53
0.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
10
fancyCount
7
fancyTags
0
"he said, his breath fogging in the subterranean chill (say, fog chill)"
1
"Hayes said, joining her (say, join)"
2
"Quinn said, her voice quiet but carrying in the echoing space (say, carry)"
3
"Hayes commented, peering over her shoulder (comment, peer)"
4
"Quinn cut in, her tone sharp as flint (quinn cut in her tone sharp as flint)"
5
"Quinn ordered, her voice regaining its authoritative clip (order, regain)"
6
"Quinn said, turning away from the body and heading back toward the stairs that led to the sane, sunlit world (say, turn away head lead)"
83.7536%