NC Bench
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Run: 2026-02-17-01KHMR0VMQBZS45KPA927Z30X9
Run Details
Model:
Gemini 3 Flash (Preview)
Test:
Bad Writing Habits
Scenario:
Thriller: chase through city streets
Duration:
16.8s
Cost:
$0.006600
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="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
The rain in London didn’t fall so much as it dissolved the world into shades of charcoal and slate. Detective Harlow Quinn adjusted the collar of her wax-canvas coat, feeling the dampness
begin to
seep into the grit of her bones. She stood in the shadow of a brick alcove across from The Raven’s Nest, her eyes fixed on the distinctive green neon sign that hummed with a low, electric vibration. The light cast a sickly emerald hue over the puddles, turning the Soho pavement into a shimmering, toxic mirror. She checked the worn leather
watch
on her left wrist. Midnight had come and gone. Her salt-and-pepper hair, cropped close to her skull in a style that favored utility over vanity,
was beaded
with moisture. For eighteen years, Quinn had moved through these streets with the measured precision of a hunting hound, but tonight the air felt different. It felt heavy with the same inexplicable statics that had preceded the night DS Morris vanished into the dark three years ago. The door of The Raven’s Nest creaked open. A man stepped out, his silhouette framed by the amber warmth of the bar’s interior. Even from fifty yards, Quinn recognized the gait. Tomás Herrera. He moved with a practiced, nervous energy, his hands buried deep in his pockets. He wasn’t a criminal in the traditional sense—at least not the kind Quinn usually hunted. He was a ghost-doctor, a former paramedic who had traded his NHS badge for a life in the shadows, stitching up wounds that shouldn't exist. Herrera didn't look left or right. He turned toward the mouth of the alley and broke into a fast walk. “Moving,” Quinn whispered into the collar of her coat, though there was no one on the other end of her radio tonight. This was off-the-books. This was for Morris. She stepped out of the alcove, her boots silent on the wet asphalt. She kept her distance, using the clutter of the city—abandoned skips, stacks of wooden pallets, the skeletal remains of a scaffolding rig—to mask her approach. Herrera was fast, driven by a visible anxiety. He kept clutching at something beneath his shirt, a nervous tic Quinn knew well. Most men in his position carried a knife; Herrera carried a Saint Christopher medallion and a head full of secrets. The chase stretched north, carving through the labyrinthine guts of London. They crossed into Camden, where the gentrified storefronts gave way to the derelict remains of the industrial age. The rain intensified, a sheeting downpour that blurred the lines of the buildings. Quinn wiped the water from her eyes, her sharp jaw set in a line of grim determination. Her lungs burned with the cold air, but she didn't slacken her pace. Herrera
suddenly
veered left, disappearing behind a rusted chain-link fence that guarded an entrance to the Underground. Quinn slowed, her hand instinctively drifting to the baton at her belt. This wasn't a functioning station. This was one of the many ghost stations, a concrete tomb swallowed by the city’s expansion. She reached the fence and found a gap where the wire had
been peeled
back like a tin can. Beyond lay a set of stone stairs leading into a throat of absolute blackness. “Don't do it, Tomás,” she muttered to the empty street. “Don’t make me go down there.” The smell hit her first—a cloying mixture of ozone, rotting lilies, and something metallic, like blood on a hot stove. It was the scent of the Veil Market. She’d heard ripples of it in the interrogation rooms of the Met, whispers from frantic junkies and broken informants who claimed there was a city beneath the city. Quinn took a breath, centered her
weight
, and descended. The darkness of the stairwell didn't last. As she rounded the first landing, a faint, rhythmic thumping
began to
vibrate through the soles of her boots. Lights
flickered
to life—not the yellow hum of sodium bulbs, but the flickering glow of lanterns filled with bioluminescent moss and jars of trapped, sparking vapor. At the base of the stairs sat a man on a collapsed crate. He
was withered
, his skin like parchment paper, and his eyes were milky cataracts that didn't
seem to
track her movement. He held out a gnarled hand. Quinn froze. She didn't have what he wanted. She knew the lore of the street; the entrance to the Market required a bone token. She reached into her pocket, her fingers closing around a silver sovereign DS Morris had given her as a joke on her tenth anniversary. It wasn't a bone, but it was heavy with history. She dropped the coin into the man's palm. He squeezed it, his thumb tracing the Queen’s profile, and then he leaned back, kicking a heavy iron bolt aside. The door behind him groaned open. Quinn stepped through and felt the air change. It was warm here, humid and thick with the voices of a thousand unseen haggles. The Veil Market was a sprawling nightmare of commerce carved into the belly of the Camden tunnels. Rickety stalls
were built
into the tiled alcoves where commuters had once waited for the Northern Line. Now, those stalls
were draped
in silks that
shimmered
with colors that didn't exist in the spectrum of the sun. Brass scales weighed out powders made of crushed iridescent wings; jars of preserved organs shook with rhythmic, phantom pulses. She spotted Herrera’s dark, curly hair weaving through a crowd of figures that defied easy categorization. Some were tall and reed-thin, their movements too fluid to be human; others
were bundled
in so many rags they looked like heaps of walking refuse. “Herrera!” she shouted, her voice cutting through the discordant music of a three-stringed instrument
being played
in a nearby corner. Tomás spun around. His olive skin went several shades paler, his warm brown eyes widening in genuine terror. He didn't flee—not at first. He looked at the stall beside him, where a woman with fingers too long and eyes too dark
was wrapping
a glass vial in black
velvet
. “Detective,” Herrera gasped, the word lost in the din. He lunged into the thick of the crowd. Quinn shoved past a man selling maps drawn on human skin. “Police! Out of the way!” The crowd didn't part for the law. If anything, they closed ranks, a wall of strange fabrics and cold stares. Quinn used her shoulders, her military training surfacing as she bypassed a group of hooded figures. She caught a glimpse of Herrera’s scar—the jagged line along his left forearm—as he vaulted over a low table covered in silver trinkets. He
was heading
for the tracks, toward a tunnel where the darkness was so dense it
seemed to
possess mass. Quinn reached the edge of the platform. Herrera was thirty feet ahead, stumbling over the rusted rails. He stopped at the mouth of the tunnel and turned, his Saint Christopher medallion swinging wildly against his chest. “Stay back, Quinn!” he yelled, his voice
echoing
off the curved walls. “You don't belong here. They’ll smell the iron on you!” “I’m bringing you in, Tomás,” Quinn said, her voice steady despite the hammer of her heart. She stepped off the platform, her boots crunching on the soot-covered gravel of the track bed. “Tell me what happened to Morris. Tell me what you’re doing in this hole, and maybe we can walk out of here.” Herrera shook his head, a desperate, frantic motion. “Morris saw what he wasn't supposed to see. Just like you’re doing now. This place... it doesn't like prying eyes.” From the darkness of the tunnel behind Herrera, a low, chittering sound emerged. It wasn't organic. It sounded like a thousand clockwork gears grinding against bone. A cold wind
began to
howl from the depths, carrying the scent of ancient dust and ozone. Quinn felt the hair on her arms stand up. The worn leather of her
watch
strap
suddenly
felt hot against her wrist, the ticking of the mechanism accelerating until it was a blur of sound. “Tomás, move!” she commanded, reaching out a hand. Herrera looked behind him, his face contorting in fear. He looked back at Quinn, a flash of pity crossing his features. “I can’t. I’m the only one who can heal what’s coming.” He backed into the shadows. Quinn surged forward, her hand catching the sleeve of his jacket, but the darkness in the tunnel
seemed to
reach out, a physical force that repelled her. A shock of static electricity threw her backward, her spine hitting the edge of the concrete platform with a sickening thud. By the time the stars cleared from her vision, the tunnel was silent. Herrera
was gone
. The chittering had faded into the distant hum of the city above, and the market behind her
seemed to
have dimmed, the vendors melting away into the recesses of the station like smoke in a breeze. Quinn stood up
slowly
, clutching her side. She looked down at her
watch
. The glass was cracked, and the hands
were spinning
backward, clockwise and counter, lost in a time that no longer applied. She was alone in the dark, thirty feet below the streets she thought she knew, with nothing but the taste of copper in her mouth and the terrifying realization that her eighteen years of decorated service had prepared her for absolutely nothing. She turned back toward the stairs, the
weight
of the silver sovereign Morris had given her replaced by a hollow, aching void in her pocket. The chase wasn't over. It had simply shifted into a realm where the rules
were written
in a language she had yet to learn.
created_at
"2026-02-17T02:49:27.710308+00:00"
2/17/2026, 2:49:27 AM
model
"google/gemini-3-flash-preview-20251217"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
792
moderation_latency
(null)
generation_time
16742
tokens_prompt
914
tokens_completion
2427
native_tokens_prompt
852
native_tokens_completion
2058
native_tokens_completion_images
0
native_tokens_reasoning
0
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
0.0066
router
(null)
provider_responses
0
status
200
is_byok
false
latency
792
endpoint_id
"6e82f652-2693-4b60-bbe0-7362d6e345f0"
provider_name
"Google AI Studio"
model_permaslug
"google/gemini-3-flash-preview-20251217"
api_type
"completions"
id
"gen-1771296550-sDbfjGDJrB05UvEnTwnr"
upstream_id
(null)
total_cost
0.0066
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
5
adverbTagCount
0
adverbTags
(empty)
81.6064%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1631
totalAiIsmAdverbs
3
found
0
adverb
"slowly"
count
1
1
adverb
"suddenly"
count
2
highlights
0
"slowly"
1
"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)
63.2128%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1631
totalAiIsms
6
found
0
word
"flickered"
count
1
1
word
"shimmered"
count
1
2
word
"velvet"
count
1
3
word
"weight"
count
2
4
word
"echoing"
count
1
highlights
0
"flickered"
1
"shimmered"
2
"velvet"
3
"weight"
4
"echoing"
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
106
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
3
hedgeCount
7
narrationSentences
106
filterMatches
0
"watch"
hedgeMatches
0
"begin to"
1
"began to"
2
"seem to"
3
"seemed to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
0
totalSentences
112
matches
(empty)
100.0000%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
37
mean
43.59
std
23.19
cv
0.532
sampleLengths
0
90
1
80
2
87
3
20
4
29
5
80
6
72
7
50
8
33
9
16
10
56
11
9
12
52
13
40
14
58
15
34
16
23
17
73
18
42
19
20
20
49
21
17
22
16
23
59
24
20
25
36
26
22
27
54
28
28
29
43
30
35
31
8
32
32
33
53
34
52
35
34
36
91
76.7296%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
9
totalSentences
106
matches
0
"was beaded"
1
"been peeled"
2
"was withered"
3
"were built"
4
"were draped"
5
"were bundled"
6
"being played"
7
"was gone"
8
"were written"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
3
totalVerbs
237
matches
0
"was wrapping"
1
"was heading"
2
"were spinning"
100.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
1540
adjectiveStacks
0
stackExamples
(empty)
adverbCount
33
adverbRatio
0.02142857142857143
lyAdverbCount
11
lyAdverbRatio
0.007142857142857143
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
112
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
112
mean
14.4
std
7.65
cv
0.531
sampleLengths
0
19
1
22
2
30
3
19
4
10
5
5
6
20
7
23
8
22
9
8
10
15
11
8
12
2
13
14
14
15
15
25
16
6
17
14
18
22
19
3
20
4
21
13
22
25
23
8
24
14
25
20
26
11
27
18
28
13
29
17
30
13
31
17
32
12
33
5
34
16
35
19
36
14
37
10
38
6
39
20
40
8
41
28
42
9
43
7
44
19
45
26
46
13
47
21
48
6
49
2
42.8571%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
12
diversityRatio
0.32142857142857145
totalSentences
112
uniqueOpeners
36
0.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
5
fancyCount
4
fancyTags
0
"Quinn whispered into the collar of her coat, though there was no one on the other end of her radio tonight (whisper does not be no)"
1
"she muttered to the empty street (mutter)"
2
"shouted (shout)"
3
"Herrera gasped, the word lost in the din (gasp, lose)"
86.1415%