NC Bench
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Run: 2026-02-17-01KHMPDM4TXDTMSK9YNKN7KCK7
Run Details
Model:
GPT-4o, Aug. 6th (temp=1)
Test:
Bad Writing Habits
Scenario:
Thriller: chase through city streets
Duration:
32.6s
Cost:
$0.015598
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
Cold rain battered the narrow streets of Soho, each droplet a pinprick against Detective Harlow Quinn's skin. Her coat was buttoned
tightly
, shoulders squared with military precision as she
navigated
the slick pavement, eyes never
wavering
from her target—a shadowy figure darting ahead, slipping between the scarce crowd that hadn't yet been driven indoors by the storm. They stumbled out of The Raven's Nest, the bar's green neon sign reflecting off puddles like
fractured
emeralds. She had caught a glimpse of Tomás Herrera inside, a quick meeting in the far corner, concealed by boisterous laughter and clinking glasses. Tomás, lean and quick, had ducked out first, headed deeper into the night, his
footsteps
echoing
like a rhythm meant to be followed. Quinn knew his reputation—off-the-books medic, an essential but slippery cog in the supernatural underworld she barely grasped. The rain turned his brown curls slick as he ran, the Saint Christopher medallion at his throat flashing intermittently with each streetlight passed. Ahead, he veered left into an alley Quinn knew well. She followed, her shoes splashing through pooled water, her worn leather
watch
ticking steadily, synchronized with her racing heart. "Tomás!" she called over the deluge, her voice swallowed by the darkness. He didn't stop. His lithe figure, silhouetted briefly by a narrow shaft of light from above, disappeared down a set of stairs she didn't recognize, behind a wrought-iron gate rattling in the wind. Quinn hesitated at the top of the stairs, peering down into shadows deeper than any she had known. She thumbed the butt of her service weapon under her coat, debating. This wasn't her territory. The subtle brush of her conscience warned against descending into the unknown, a warning sharpened by the memory of DS Morris, lost in chaos she couldn't fathom. But her instincts insisted. Answers lay in wait, just beyond her hesitance and the bone-deep chill of the rain. With a steadying breath, she pushed through the gate, wincing as it shrieked on hinges older than she was, and made her cautious descent. The stairs delivered her into an abandoned Tube station, a relic buried beneath Camden she'd only heard whispers about. Veil Market, the name unfurled in her mind,
echoing
with stories of forbidden goods and dangerous gatherings. The passage ahead
was lined
with temporary stalls, their dim lighting flickering under sheets of cloth hung from the vaulted ceiling.
The air was thick with
incense and magic,
oppressive
yet drawing her in. Creatures she had only seen in backrooms of police files moved alongside those who looked like ordinary men and women, but none paid her more than a passing glance. At the end of one aisle, a glimpse of olive skin, dark curls. Herrera
was negotiating
with a vendor cloaked in shadows, exchanging quick words she couldn't overhear. Quinn advanced with measured steps, her presence merging with the peculiar harmony of the market—a
symphony
of whispered deals and covert glances. He caught sight of her then, his expression shifting from calm to alarm in an instant. She saw the scar on his arm, a pale slash vivid even under the poor light, a relic of violence she knew he'd endured but never discussed. The market's hum turned conspiratorial as he bolted again, pushing through a curtain of bead strands into another tunnel, his figure swallowed instantly by the darkness. Quinn pursued with determined strides, her pulse steadying to the rhythm of her resolve. This was it—the choice that could bridge the chasm between questions and the truth veiled by the whispers of her world. The tunnel twisted and turned, each step taking her further from her realm of safety. Her breath was loud in her ears, her heartbeat an erratic drum. Lamps affixed to stone walls with makeshift ingenuity cast their weak glow, enough to sketch her path but not enough to reveal the full depth of her surroundings. Suddenly, she emerged into a vast chamber pulsing with activity—a hidden underground core, where ancient tiles met the weary steps of those living in the market's shroud. In the center, Herrera stood at a kiosk draped in dark fabrics hung with baubles that glimmered unnaturally. Quinn approached
warily
, slipping between patrons until she reached him. His eyes met hers, the moment stretching taut between them. "It doesn't have to end like this, Tomás," she said, her voice pitched low but firm, borne by the urgency of the chase and the peculiar quiet blanketing the room. He backed away
slightly
, hands held out, placating. "Detective, you shouldn't be here." "I go where justice takes me," she replied. His gaze
flicked
to the crowd, noting those who had paused to
watch
their exchange, curiosity abounding. "You're risking more than you know, Quinn." "Then help me understand. What's going on?" "Not here, not now," Herrera insisted, his tone edged with desperation. "This place, these people... you’re touching a world that will change you forever." The atmosphere shifted, people glancing towards the two with varied expressions—fear, suspicion, interest. Her hand brushed against the Saint Christopher medallion, the metal cool under her fingers, grounding her in its simplicity. The past swept through her, murmurs of an unsolved case, partners lost to shadows she couldn't quite see. A web of riddles woven tighter with every step into the unknown. Could she leave this place without knowing, leave Herrera and his secrets to the depths? He sensed her conflict and leaned in, lowering his voice. "Trust me, Harlow. There's a line you cross, and after that, nothing is the same. Let me go tonight, and I'll show you the way that doesn't end in loss." Quinn studied him, the earnest warmth behind his brown eyes at odds with the furore around them. She recalled DS Morris, a parallel path crossed but unfinished, and made her choice. "Go," she said, stepping aside, releasing the tension in her stance. "I'll hold you to your promise, Tomás." He hesitated briefly, reading her face, then nodded. With a last cautious glance at the gathering crowd, he disappeared into another warren of passages, taking his knowledge and burdens with him. Quinn remained, the market now humming with renewed clamor. She had gambled on his word and perhaps staked a piece of herself on the outcome, but as she turned back towards the stairs, swallowed by shadows and rain, she
reasoned that some
truths needed time to emerge from the underground.
created_at
"2026-02-17T02:21:44.700555+00:00"
2/17/2026, 2:21:44 AM
model
"openai/gpt-4o-2024-08-06"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1165
moderation_latency
(null)
generation_time
32535
tokens_prompt
914
tokens_completion
1674
native_tokens_prompt
811
native_tokens_completion
1357
native_tokens_completion_images
(null)
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
0.0155975
router
(null)
provider_responses
0
id
"chatcmpl-DA503jvY6Z60PcxBszatNb6ttIdTk"
status
200
is_byok
false
latency
1111
endpoint_id
"9d15935a-34e6-4a5e-a5bc-c7dda213e876"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-4o-2024-08-06"
api_type
"completions"
id
"gen-1771294871-M1EI7bJZE2LhHOBFaplQ"
upstream_id
"chatcmpl-DA503jvY6Z60PcxBszatNb6ttIdTk"
total_cost
0.0155975
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
66.6667%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
5
adverbTagCount
1
adverbTags
0
"she said, stepping aside, releasing the tension in her stance [aside]"
62.7907%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1075
totalAiIsmAdverbs
4
found
0
adverb
"slightly"
count
1
1
adverb
"suddenly"
count
1
2
adverb
"tightly"
count
1
3
adverb
"warily"
count
1
highlights
0
"slightly"
1
"suddenly"
2
"tightly"
3
"warily"
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)
16.2791%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1075
totalAiIsms
9
found
0
word
"symphony"
count
1
1
word
"flicked"
count
1
2
word
"wavering"
count
1
3
word
"oppressive"
count
1
4
word
"fractured"
count
1
5
word
"footsteps"
count
1
6
word
"echoing"
count
2
7
word
"navigated"
count
1
highlights
0
"symphony"
1
"flicked"
2
"wavering"
3
"oppressive"
4
"fractured"
5
"footsteps"
6
"echoing"
7
"navigated"
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
57
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
1
hedgeCount
0
narrationSentences
57
filterMatches
0
"watch"
hedgeMatches
(empty)
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
1
totalSentences
63
matches
0
"reasoned that some"
97.2363%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
28
mean
38.04
std
18.65
cv
0.49
sampleLengths
0
57
1
81
2
52
3
12
4
33
5
61
6
43
7
36
8
63
9
50
10
69
11
35
12
55
13
45
14
20
15
30
16
13
17
8
18
24
19
7
20
24
21
32
22
45
23
40
24
31
25
18
26
31
27
50
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
2
totalSentences
57
matches
0
"was buttoned been driven"
1
"was lined"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
1
totalVerbs
173
matches
0
"was negotiating"
100.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
986
adjectiveStacks
0
stackExamples
(empty)
adverbCount
28
adverbRatio
0.028397565922920892
lyAdverbCount
13
lyAdverbRatio
0.013184584178498986
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
63
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
63
mean
16.9
std
8.24
cv
0.487
sampleLengths
0
17
1
40
2
18
3
23
4
23
5
17
6
23
7
10
8
19
9
12
10
3
11
30
12
18
13
12
14
4
15
27
16
4
17
15
18
24
19
19
20
17
21
21
22
13
23
29
24
13
25
15
26
22
27
16
28
27
29
26
30
14
31
21
32
15
33
12
34
28
35
27
36
18
37
10
38
10
39
30
40
8
41
5
42
8
43
17
44
7
45
7
46
11
47
13
48
13
49
19
80.4233%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
1
diversityRatio
0.49206349206349204
totalSentences
63
uniqueOpeners
31
25.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
5
fancyCount
3
fancyTags
0
"she said, her voice pitched low but firm, borne by the urgency of the chase and the peculiar quiet blanketing the room (say, pitch)"
1
"Herrera insisted, his tone edged with desperation (insist, edge)"
2
"she said, stepping aside, releasing the tension in her stance (say, step aside, release)"
85.1998%