NC Bench
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Run: 2026-02-17-01KHMR5MKCNBV3DAE3NKSGQR5X
Run Details
Model:
Gemini 2.5 Pro
Test:
Bad Writing Habits
Scenario:
Mystery: examining a crime scene
Duration:
39.4s
Cost:
$0.038344
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 grew colder with each step down, a damp, mineral chill that leached warmth through the soles of her boots. Detective Harlow Quinn descended into the dark, her hand trailing along the grimy, curved tiles of the tunnel wall. Above, the rumble of the Northern Line was a distant tremor, a memory of the living city. Down here, the silence was a solid thing, broken only by the drip of water and the flat, professional murmur of the forensics team ahead. Police-issue light bars cast the abandoned Tube platform in a
stark
, chemical glare, bleaching the colour from the peeling advertisements for products a decade dead. The scene
was taped
off, a neat square of order imposed on a place that had forgotten the meaning of the word. Quinn ducked under the blue and white plastic, her gaze sweeping the area with an economy of motion honed over eighteen years. Detective Constable Fletcher, young and eager enough to still have a shine on his shoes, met her near the tracks. “Ma’am. Victim’s name is James Dolan, AKA Jimmy the Weasel. Small-time informant, mostly narcotics. Multiple stab wounds to the chest and abdomen. Looks like a deal gone wrong.” Quinn grunted, her eyes not on Fletcher but on the platform itself. It wasn’t just a disused station. The space
was arranged
into stalls, makeshift counters fashioned from old crates and sheets of corrugated metal. It looked like a marketplace, hastily abandoned. A strange, sweet smell
hung in the air
, something like cloves and burnt sugar, layered over the dominant scent of mould and rat droppings. “A marketplace?” Quinn said, her voice flat. “Squatters, maybe? Or kids using it for a rave,” Fletcher offered. “SOCOs found traces of some weird stuff, but nothing they can identify yet. Probably a new designer drug.” Quinn walked towards the body, a pale lump under a silver sheet. The forensics officer, a stoic woman named Agnes, looked up and gave a curt nod. Quinn crouched, the fabric of her trousers protesting. She lifted a corner of the sheet. Jimmy the Weasel, indeed. His face was a rictus of surprise, eyes wide and staring at the vaulted, darkness-swallowed ceiling. The wounds were vicious, clustered together. Not a fight. An execution. She let the sheet fall. Her gaze drifted from the body to the wall behind it. Scrawled in what looked like charcoal
were looping
,
intricate
symbols, nothing like the clumsy graffiti tags that decorated the tunnel entrance. They were elegant, deliberate. “Gangs have gotten artistic,” she murmured, more to herself than to Fletcher. “Forensics are taking samples,” he said, right on cue. “Probably just local flavour.” Quinn stood, her gaze tracking across the makeshift stalls. One sold dried herbs tied in bundles. Another had rows of murky jars filled with things that floated. A third had racks of old books and scrolls. None of it looked like the staging for a simple drug deal. It didn’t fit. Nothing fit. It felt like walking into a film set an hour after the crew had vanished, leaving the props to gather dust. Her worn leather
watch
felt tight on her wrist, a familiar pressure in an unfamiliar place. That
feel
ing—a discordant note in the
symphony
of a crime scene—was one she hadn’t
truly
felt in three years. Not since she’d found DS Morris in that abandoned warehouse in Hackney, his service weapon still holstered, his face frozen in an expression of sheer, unadulterated terror, with not a single physical mark on him. The coroner had called it a Vagal Inhibition. A freak heart attack. Quinn called it a lie. “We have a witness,” Fletcher said, pulling her from the memory. He pointed with his pen towards an alcove near the station’s defunct spiral staircase. “Says she found the body. Name’s Eva Kowalski.” Quinn’s
eyes narrowed
. The woman standing there was a splash of colour in the monochrome gloom. Curly red hair escaped a messy bun, and round glasses perched on a freckled nose. She clutched the strap of a heavy leather satchel to her chest like a shield. She looked like a lost university student,
utterly
and
completely
out of place. Quinn walked over, her gait carrying the military precision that never quite left her. The woman, Eva Kowalski, flinched as she approached. Her green eyes were wide behind her lenses. “Detective Quinn,” she said, her voice crisp. “You’re the one who found Mr. Dolan?” “Yes. I… I was down here doing research.” Eva tucked a stray curl behind her left ear. Her fingers
trembled
slightly
. “Research?” Quinn’s tone was skeptical. “What kind of research requires wandering through condemned tunnels at two in the morning?” “Architectural. Historical,” Eva said
quickly
, her words a little too rehearsed. “I’m a research assistant at the British Museum. These old stations… they’re a passion of mine.” She gestured vaguely at the tiled walls. Quinn let the silence stretch. She
watch
ed the nervous tic repeat—the tuck of hair behind the ear. She
watch
ed the way Eva’s eyes refused to meet hers, darting around the strange marketplace instead, a
flicker
of something that looked like familiarity in them. “You saw the killer?” “No. I just… I heard a shout. By the time I came around the bend, there was just… him.” She gestured towards the body without looking. “I called it in immediately.” “From where? There’s no signal down here.” A blanched look. “I… ran back up to street level, of course.” A plausible lie, but a lie nonetheless. The climb was a good five minutes. The call came in less than three minutes after the estimated time of death. Quinn filed the discrepancy away. “This market,” Quinn said, changing tack. “Part of your architectural survey?” Eva’s knuckles were white where she gripped her satchel. “I don’t know what you’re talking about. It’s just junk. People leave things in places like this all the time.” Quinn held her gaze, letting the woman
feel
the full
weight
of her disbelief. Then she turned and began a slow perimeter walk, Fletcher trailing her like a shadow. She ran a gloved finger over one of the charcoal symbols on the wall. It came away clean, sealed with some kind of varnish. Not fresh. A permanent fixture. Her boots crunched on something near a collapsed stall piled high with what looked like rags. Quinn knelt, pushing aside a piece of mouldy canvas. Underneath, half-hidden in the grime, was a small brass object. She picked it up
carefully
. It was a compass, no bigger than her thumb. The brass was tarnished with a patina of verdigris, and the glass face was scratched. But it wasn’t an ordinary compass. The face wasn’t marked with cardinal directions, but with a circle of those same elegant, interlocking sigils
etched
on the wall. The needle, a sliver of dark, polished metal,
wasn’t pointing
north. It
wasn’t pointing
anywhere, in fact. It
was rotating
in a slow, lazy circle, as if searching for something it couldn’t find. “Just an old trinket, ma’am,” Fletcher said, peering over her shoulder. “Probably fell out of the victim’s pocket during the struggle.” Quinn didn’t answer. She remembered an item from Morris’s personal effects. A similar object, logged as a ‘vintage novelty compass’, found on the floor of the warehouse beside him. At the time, she’d dismissed it. Now, the hair on her arms stood on end. She closed her hand around the cool metal, the
etched
sigils pressing into her glove. She stood and walked directly back to Eva Kowalski. The young woman
was watching
her, a new, undisguised fear in her eyes. Quinn opened her hand, revealing the compass on her palm. “Another piece of fascinating architecture, Ms. Kowalski?” The reaction was instantaneous. Eva recoiled as if Quinn had offered her a snake. Her breath hitched. The academic composure she’d fought to maintain shattered into a thousand pieces, leaving only raw panic. “Where did you
get that?” she
whispered, her gaze locked on the compass. “Near the body,” Quinn said, her voice low and dangerous. “It seems this place is full of historical artefacts. You work at a museum. Tell me what it is.” Eva shook her head, tucking her hair back in a frantic, repeated motion. “I can’t. I don’t know.” “You do,” Quinn pressed, taking a step closer. The spinning needle on the compass
seemed to
speed up
slightly
. “You know what this place is. Not a squat, not a rave. This is the Veil Market. And you know what this compass does. It doesn’t point north.” Eva Kowalski stared at her, all the blood drained from her face. In the harsh glare of the police lights, her freckles stood out like flecks of rust. The curated lies had crumbled, and behind them was a truth Quinn could only
begin to
guess at—a truth of floating things in jars and sigils that hummed with a purpose she couldn't name. A truth that smelled like cloves and burnt sugar. A truth that had left her partner dead in a warehouse three years ago. This wasn’t just a murder. It was a message. And for the first time in three years, Detective Harlow Quinn felt she was finally beginning to understand the language it
was written
in.
created_at
"2026-02-17T02:52:27.045032+00:00"
2/17/2026, 2:52:27 AM
model
"google/gemini-2.5-pro"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3066
moderation_latency
(null)
generation_time
39331
tokens_prompt
923
tokens_completion
3294
native_tokens_prompt
883
native_tokens_completion
3724
native_tokens_completion_images
0
native_tokens_reasoning
1683
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
0.03834375
router
(null)
provider_responses
0
status
200
is_byok
false
latency
3066
endpoint_id
"b261d15b-95ce-4c8c-8bce-00eb0dc1ff77"
provider_name
"Google AI Studio"
model_permaslug
"google/gemini-2.5-pro"
api_type
"completions"
id
"gen-1771296707-I6KdnKfEa0Bweu0onvPC"
upstream_id
(null)
total_cost
0.03834375
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
77.7778%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
12
adverbTagCount
2
adverbTags
0
"she murmured, more to herself than to Fletcher [more]"
1
"Eva said quickly, her words a little too rehearsed [quickly, too]"
54.7804%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1548
totalAiIsmAdverbs
7
found
0
adverb
"carefully"
count
1
1
adverb
"completely"
count
1
2
adverb
"quickly"
count
1
3
adverb
"slightly"
count
2
4
adverb
"utterly"
count
1
5
adverb
"truly"
count
1
highlights
0
"carefully"
1
"completely"
2
"quickly"
3
"slightly"
4
"utterly"
5
"truly"
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)
48.3204%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1548
totalAiIsms
8
found
0
word
"symphony"
count
1
1
word
"flicker"
count
1
2
word
"trembled"
count
1
3
word
"intricate"
count
1
4
word
"stark"
count
1
5
word
"weight"
count
1
6
word
"etched"
count
2
highlights
0
"symphony"
1
"flicker"
2
"trembled"
3
"intricate"
4
"stark"
5
"weight"
6
"etched"
66.6667%
Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches
2
maxInWindow
2
found
0
label
"eyes widened/narrowed"
count
1
1
label
"hung in the air"
count
1
highlights
0
"eyes narrowed"
1
"hung in the air"
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
0
narrationSentences
115
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
2
hedgeCount
2
narrationSentences
115
filterMatches
0
"watch"
1
"feel"
hedgeMatches
0
"seemed to"
1
"begin to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
1
totalSentences
132
matches
0
"get that?” she"
100.0000%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
43
mean
35.81
std
23.57
cv
0.658
sampleLengths
0
82
1
69
2
48
3
66
4
7
5
29
6
73
7
41
8
12
9
13
10
90
11
71
12
33
13
59
14
30
15
14
16
21
17
19
18
34
19
43
20
4
21
31
22
7
23
12
24
33
25
11
26
29
27
58
28
40
29
84
30
21
31
59
32
32
33
7
34
33
35
13
36
29
37
18
38
47
39
62
40
9
41
14
42
33
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
3
totalSentences
115
matches
0
"was taped"
1
"was arranged"
2
"was written"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
5
totalVerbs
214
matches
0
"were looping"
1
"wasn’t pointing"
2
"wasn’t pointing"
3
"was rotating"
4
"was watching"
100.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
1261
adjectiveStacks
0
stackExamples
(empty)
adverbCount
38
adverbRatio
0.03013481363996828
lyAdverbCount
15
lyAdverbRatio
0.011895321173671689
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
132
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
132
mean
11.67
std
6.93
cv
0.594
sampleLengths
0
21
1
19
2
17
3
25
4
25
5
22
6
22
7
20
8
28
9
12
10
6
11
17
12
7
13
24
14
7
15
11
16
18
17
12
18
15
19
8
20
7
21
4
22
16
23
6
24
3
25
2
26
5
27
11
28
21
29
4
30
12
31
9
32
4
33
9
34
7
35
11
36
9
37
12
38
3
39
2
40
21
41
16
42
19
43
35
44
8
45
4
46
5
47
11
48
14
49
8
59.5960%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
8
diversityRatio
0.3939393939393939
totalSentences
132
uniqueOpeners
52
8.3333%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
12
fancyCount
8
fancyTags
0
"Fletcher offered (offer)"
1
"she murmured, more to herself than to Fletcher (murmur)"
2
"he said, right on cue (say, right)"
3
"Fletcher said, pulling her from the memory (say, pull)"
4
"Eva said quickly, her words a little too rehearsed (say quickly, rehearse)"
5
"Fletcher said, peering over her shoulder (say, peer)"
6
"whispered (whisper)"
7
"Quinn pressed, taking a step closer (press, take)"
83.2632%