NC Bench
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Run: 2026-02-17-01KHMQF5ZQ8C60YVBS12RW5Y4P
Run Details
Model:
GPT-4.1 Nano
Test:
Bad Writing Habits
Scenario:
Thriller: chase through city streets
Duration:
10.6s
Cost:
$0.000601
Provider:
OpenAI
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 hammered down in relentless sheets, turning the slick pavement into a shifting mirror of
fractured
city lights. Detective Harlow Quinn’s breath fogged in the cold air, each step pounding in rhythm with her pulse as she chased the figure darting ahead through Soho’s tangled alleyways. Her boots sloshed through puddles, splattering mud as she cut tighter angles, eyes fixed on the man's hurried form. He was quick, lithe—too quick to be an ordinary suspect, which only deepened her suspicion. Close-cropped salt-and-pepper hair clung to her scalp, and her sharp
jaw clenched
with the same military precision she’d carried through eighteen years of service. Her left wrist brushed the worn leather band of her
watch
— a silent reminder that every second counted. Behind her, the city’s muffled sounds persisted: distant sirens, the
echo
of
footsteps
reacting to her pursuit, the faint hum of neon signs battling the darkness. But she pressed on, her focus narrowing to the figure ahead. The man glanced over his shoulder, a split second of hesitation, then pushed harder, slipping through a gap between two buildings. Quinn darted after him, her heart pounding in her ears as she followed through a narrow alley squeezed between crumbling brick walls plastered with graffiti—some claiming allegiance to secret factions she suspected
were intertwined
with the clique she sought to uncover. Her hand
flicked
to her radio, but the static was only a distant reminder that this chase was about instincts, not orders. The suspect
was heading
toward an alley entrance where old, uneven cobblestones led to a nondescript door, partially hidden behind a failed stack of crates. He reached out, fumbling with a latch that looked almost like an afterthought—until he pulled a small, forged bone token from his pocket, pressing it into a concealed slot. The door clicked open with a grimace of aged hinges, revealing a dark, yawning maw beneath the street—an en
try to
shadows. For a heartbeat, Quinn hesitated. She knew—intuitively—that following could plunge her into a place she’d only seen glimpses of in the whispers of informants: the Veil Market. Hidden beneath Camden's quiet ruins, a black-market nexus for the supernatural, cloaked in secrecy and danger. The rain battered harder, pounding steel against her resolve. She knew the stakes. Whatever the suspect carried, whatever he
was running
from—if she let him slip away into that darkness, she might never find him again, and worse, she might be stepping into the unknown, into territory where her uniform and badge had little meaning. She closed her eyes for a second, feeling the
weight
of her decision settle heavy on her shoulders. Then her hand gripped the cold steel of her Glock, a faint tremor running through her fingers, overridden by that relentless sense of duty. She nodded to herself—then pushed open the door. The smell hit first: damp, earthy,
tinged
with incense and something acrid, like burnt herbs.
The air was thick with
secrets. Inside, the narrow corridor stretched downward, illuminated by
flicker
ing amber bulbs strung haphazardly overhead. The walls
were lined
with rough plywood, cobbled together over forgotten bricks, and faint whispers
echo
ed from the shadows—voices speaking in hushed tones, bargaining over forbidden artifacts. The suspect had disappeared from her sight, swallowed by the darkness. Quinn moved stealthily, each step careful but steady, her gaze scanning the shadows. Her hand hovered near her side, ready for anything—weapon drawn, senses alert. Ahead, the corridor branched into a market’s labyrinthine maze, low tables piled with oddities: glowing stones, vials bubbling with iridescent liquids, charms carved from bone and wood. A shrouded figure nodded to her from a stall, the glow of a silver dagger faint against her palm, teeth barely visible beneath a hood. She caught a
flicker
of movement further down—a silhouette slipping behind a stack of crates. Quinn’s instincts screamed at her to follow, but caution tethered her steps. She remembered the stories, the warnings—this place was a den of mercenaries, smugglers, and worse. She’d seen the aftermath of deals gone wrong, saw innocents lost here. Yet, her quarry was already gone, and her gut warned her she couldn’t afford hesitation. She moved through the market, her boots muted on the slick stone, the sheer
weight
of darkness pressing against her skin. Somewhere ahead, a clink of glass and muffled voices drifted to her ears. She kept low, pressing upward against a stall crowded with enchanted amulets. The glow of a nearby lantern reflected in the eyes of a woman counting coins, her face half-hidden behind a tangle of beads and charms. Quinn’s gaze drifted past, locked on the shadows beyond the stall, searching for her suspect. Then she saw him—a
flicker
of movement behind a torn curtain. He
was crouched
, clutching a small, bundled object tight to his chest. Quinn’s mind raced. Was it evidence? Something more dangerous? She needed to decide—advance, or retreat? A shiver crawled down her spine as she considered the odds. Entering this realm meant chaos; it meant flirting with things her department didn't acknowledge existed. If she followed him deeper, she might be walking into a trap—an ambush of supernatural power, or an encounter she wouldn’t survive unprepared. But letting him go? That was worse. It was a gamble—one that could cost her everything she’d fought for, perhaps even her brother’s memory, lost to a case that shifted into shadows he’d warned her about. Her grip tightened on her weapon. Slowly, she moved forward. Her boots
echo
ed
softly
on the uneven floor. She
flicked
her eyes to the sides—nothing but darkness, the faint shimmer of enchanted objects, the
looming
silence broken only by her breathing. She drew closer without sound, senses prickling. With a decisive breath, she stepped into the opening behind the curtain—ready to confront, or to make the call: chase into the storm, or retreat and regroup. The question
hung in the air
as the shadows shifted around her, obscuring the line between what was real and what lurked just beyond the edge of perception.
created_at
"2026-02-17T02:39:42.726229+00:00"
2/17/2026, 2:39:42 AM
model
"openai/gpt-4.1-nano-2025-04-14"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
444
moderation_latency
(null)
generation_time
10409
tokens_prompt
914
tokens_completion
1606
native_tokens_prompt
811
native_tokens_completion
1300
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
"completed"
usage
0.0006011
router
(null)
provider_responses
0
id
"resp_0a60b478be56fc58016993d4e3669481978d4c1afd3c0b63b4"
status
200
is_byok
false
latency
259
endpoint_id
"9251cee5-5503-4be9-9439-7ae21ff062a3"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-4.1-nano-2025-04-14"
api_type
"completions"
id
"gen-1771295971-Dofaf9SYgcLwWZbjSlhD"
upstream_id
"resp_0a60b478be56fc58016993d4e3669481978d4c1afd3c0b63b4"
total_cost
0.0006011
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
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)
80.4114%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1021
totalAiIsmAdverbs
2
found
0
adverb
"slowly"
count
1
1
adverb
"softly"
count
1
highlights
0
"slowly"
1
"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)
0.0000%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1021
totalAiIsms
14
found
0
word
"tinged"
count
1
1
word
"flicker"
count
2
2
word
"flicked"
count
2
3
word
"looming"
count
1
4
word
"fractured"
count
1
5
word
"jaw clenched"
count
1
6
word
"weight"
count
2
7
word
"footsteps"
count
1
8
word
"echo"
count
1
9
word
"echoed"
count
2
highlights
0
"tinged"
1
"flicker"
2
"flicked"
3
"looming"
4
"fractured"
5
"jaw clenched"
6
"weight"
7
"footsteps"
8
"echo"
9
"echoed"
66.6667%
Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches
3
maxInWindow
2
found
0
label
"jaw/fists clenched"
count
1
1
label
"air was thick with"
count
1
2
label
"hung in the air"
count
1
highlights
0
"jaw clenched"
1
"The air was thick with"
2
"hung in the air"
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
0
narrationSentences
61
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
1
hedgeCount
1
narrationSentences
61
filterMatches
0
"watch "
hedgeMatches
0
"try to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
0
totalSentences
61
matches
(empty)
24.7134%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
20
mean
49.95
std
11.81
cv
0.236
sampleLengths
0
66
1
58
2
58
3
63
4
75
5
43
6
55
7
50
8
62
9
36
10
52
11
54
12
49
13
52
14
38
15
49
16
42
17
35
18
34
19
28
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
3
totalSentences
61
matches
0
"were intertwined"
1
"were lined"
2
"was crouched"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
2
totalVerbs
179
matches
0
"was heading"
1
"was running"
100.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
1021
adjectiveStacks
0
stackExamples
(empty)
adverbCount
27
adverbRatio
0.02644466209598433
lyAdverbCount
11
lyAdverbRatio
0.010773751224289911
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
61
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
61
mean
16.38
std
9.08
cv
0.554
sampleLengths
0
19
1
28
2
19
3
15
4
24
5
19
6
26
7
11
8
21
9
41
10
22
11
25
12
29
13
21
14
5
15
22
16
16
17
9
18
4
19
42
20
18
21
24
22
8
23
15
24
6
25
14
26
27
27
11
28
13
29
12
30
27
31
25
32
15
33
12
34
15
35
12
36
15
37
21
38
13
39
12
40
25
41
15
42
11
43
12
44
3
45
3
46
3
47
6
48
11
49
15
64.4809%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
4
diversityRatio
0.4262295081967213
totalSentences
61
uniqueOpeners
26
100.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
0
fancyCount
0
fancyTags
(empty)
84.4866%