NC Bench
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Run: 2026-02-17-01KHMQE6P0D3S0S27V13GZ2Y8F
Run Details
Model:
Gemini 2.5 Flash
Test:
Bad Writing Habits
Scenario:
Thriller: chase through city streets
Duration:
6.9s
Cost:
$0.003481
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 downpour had turned Great Windmill Street into a slick black mirror, reflecting the stuttering neon of *The Raven’s Nest*. Harlow Quinn squinted, the rain lashing against her face with a brutal, cold efficiency. She pushed a damp strand of closely cropped salt-and-pepper hair from her eyes, the sharp jaw of her face set in a grim line. Her worn leather
watch
on her left wrist read 2:17 AM. Too late for anything good. She’d been
watch
ing *The Raven’s Nest* for three hours, the distinctive green neon sign a
beacon
of suspicion in the Soho night. Tomás Herrera had slipped out barely a minute ago, a silhouette against the garish light, disappearing east down the street. Quinn took off after him, her thirty-one years of military precision in every stride. Tomás was quick, his short curly dark brown hair plastered to his head, his olive skin
gleaming
under the streetlights. He moved with a practiced ease through the narrow, twisting lanes of Soho, each turn taking him deeper into the labyrinthine heart of London. Quinn kept pace, her gaze locked on the Saint Christopher medallion that bounced against his back, a small, silver target in the
oppressive
night. He
was going
somewhere in a hurry, not just home. He cut down Rupert Street, then veered
sharply
into Greek Street, the rhythmic slap of their shoes on the wet pavement the only sound save for the drumming rain. Quinn’s breath hitched, a stitch forming in her side, but she pressed on, the memory of DS Morris a cold, hard knot in her gut. She’d lost Morris, lost him in a way she still couldn’t explain, three years ago. This clique, these people hovering in the shadowed edges of the city, they
were connected
. She knew it. Tomás glanced over his shoulder, his warm brown eyes wide with surprise and a
flicker
of something close to recognition. He sped up, a renewed urgency in his stride. He must have known she was there, had been running her. The realization tightened Quinn’s jaw, a fresh burst of adrenaline flooding her system. She accelerated, closing the distance. They burst out onto Charing Cross Road, the traffic a blurry stream of red and white lights. Tomás risked a direct path, darting between two taxis, a blare of horns in his wake. Quinn didn’t hesitate, slipping through the same gap with an almost surgical precision. He
was heading
for Tottenham Court Road, towards Camden. And Quinn knew what that meant. Camden… the Veil Market. She'd been hearing rumors, whispers among informants about a black market that moved with the full moon, a place hidden, selling things that shouldn't exist. She’d never had concrete proof, never had a lead. Until now. Tomás ducked into an alleyway, a gaping maw between two derelict buildings. Quinn followed, her hand instinctively going to the Glock at her hip. The air grew heavy, thick with the smell of damp brick and something else, something metallic and faintly sweet. This wasn’t just an alley. It felt… older, deeper. The alley opened into a small, grimy courtyard, overlooked by blackened windows. At the far end, a set of crumbling concrete steps descended into darkness. Tomás was already halfway down, his figure swallowed by the inky black. Quinn paused, her heart thumping against her ribs. This was territory she knew nothing about, a place the official records wouldn’t touch. Every instinct screamed at her to stop, to call for backup, to wait. But then she pictured Morris’s face,
etched
in her memory, and the cold logic of her mission reasserted itself. She had to know. She descended the steps, one hand on the cold, damp wall. The air grew colder, the sound of the rain fading to a distant murmur. A faint, greenish light pulsed from below, casting strange, elongated shadows. The steps ended at a rusted metal door,
slightly
ajar. Pushing it open, Quinn found herself in a narrow, decaying tunnel.
The air was thick with
dust and the metallic tang she’d noticed earlier, but now it was sharper, laced with something else, something earthy and ancient. The greenish light source was clearer now, emanating from around a bend in the tunnel. She moved
cautiously
, her hand never leaving the Glock. Her military bearing, honed over 18 years of decorated service, held her rigid, her senses on high alert. The tunnel opened into a vast space, a cavernous chamber where the greenish light was stronger, pulsing from bioluminescent fungi clinging to the walls and ceiling. Below her, a scene unfolded that defied explanation. It was a market, but unlike any she had ever seen. Stalls fashioned from salvaged materials
were overflowing
with strange, glowing objects, vials of shimmering liquids, and
intricate
carvings that
seemed to
shift and writhe in the dim light. Figures moved among the stalls, some clearly human, others… less so. She saw things that looked like shadows given form, creatures with too many limbs, and others whose eyes glowed with an unsettling inner light. This was the Veil Market. This was what Morris had been getting close to. Tomás was already down there, weaving through the throng, his Saint Christopher medallion a familiar anchor in a sea of the unknown. He
was making
for a stall at the far end, manned by a gaunt figure whose face
was obscured
by a wide-brimmed hat. Quinn hesitated at the edge of the opening, the noise of the market washing over her – a low hum of chatter, the clink of strange coins, the occasional unearthly cry. Every fiber of her
being screamed
caution. This was not her world, not something she
was equipped
for. But years of detective work, of chasing down the inexplicable, had taught her that sometimes, you had to step into the darkness to find the light. She had to go. She had to know what Tomás
was doing
here, what her instincts had been telling her all along. Steeling herself, she took the first step down into the market, her gaze fixed on Tomás, her hand firm on her weapon.
created_at
"2026-02-17T02:39:06.451047+00:00"
2/17/2026, 2:39:06 AM
model
"google/gemini-2.5-flash"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
366
moderation_latency
(null)
generation_time
6533
tokens_prompt
914
tokens_completion
1525
native_tokens_prompt
852
native_tokens_completion
1290
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
0.0034806
router
(null)
provider_responses
0
status
200
is_byok
false
latency
366
endpoint_id
"16c01e26-9b91-4d22-b487-ed35634b017d"
provider_name
"Google AI Studio"
model_permaslug
"google/gemini-2.5-flash"
api_type
"completions"
id
"gen-1771295939-mHcUOAA3mlcuJfd6CWae"
upstream_id
(null)
total_cost
0.0034806
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
0
adverbTagCount
0
adverbTags
(empty)
70.4433%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1015
totalAiIsmAdverbs
3
found
0
adverb
"cautiously"
count
1
1
adverb
"sharply"
count
1
2
adverb
"slightly"
count
1
highlights
0
"cautiously"
1
"sharply"
2
"slightly"
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)
40.8867%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1015
totalAiIsms
6
found
0
word
"beacon"
count
1
1
word
"flicker"
count
1
2
word
"gleaming"
count
1
3
word
"oppressive"
count
1
4
word
"intricate"
count
1
5
word
"etched"
count
1
highlights
0
"beacon"
1
"flicker"
2
"gleaming"
3
"oppressive"
4
"intricate"
5
"etched"
100.0000%
Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches
1
maxInWindow
1
found
0
label
"air was thick with"
count
1
highlights
0
"The air was thick with"
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
1
narrationSentences
73
filterMatches
0
"watch"
hedgeMatches
0
"seemed to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
0
totalSentences
73
matches
(empty)
61.9685%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
19
mean
53.26
std
19.54
cv
0.367
sampleLengths
0
74
1
56
2
78
3
87
4
58
5
46
6
55
7
52
8
37
9
58
10
46
11
52
12
53
13
8
14
74
15
14
16
45
17
75
18
44
96.8037%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
4
totalSentences
73
matches
0
"were connected"
1
"was obscured"
2
"being screamed"
3
"was equipped"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
5
totalVerbs
153
matches
0
"was going"
1
"was heading"
2
"were overflowing"
3
"was making"
4
"was doing"
94.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
1015
adjectiveStacks
1
stackExamples
0
"faint, greenish light pulsed"
adverbCount
25
adverbRatio
0.024630541871921183
lyAdverbCount
11
lyAdverbRatio
0.01083743842364532
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
73
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
73
mean
13.86
std
7.64
cv
0.551
sampleLengths
0
20
1
14
2
24
3
11
4
5
5
22
6
20
7
14
8
20
9
24
10
24
11
10
12
29
13
25
14
15
15
15
16
3
17
20
18
9
19
11
20
13
21
5
22
17
23
16
24
13
25
9
26
6
27
1
28
3
29
25
30
9
31
2
32
12
33
12
34
19
35
5
36
2
37
2
38
12
39
13
40
12
41
8
42
14
43
13
44
19
45
4
46
11
47
14
48
11
49
10
47.4886%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
7
diversityRatio
0.3424657534246575
totalSentences
73
uniqueOpeners
25
100.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
0
fancyCount
0
fancyTags
(empty)
88.9171%