NC Bench
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Run: 2026-02-17-01KHMPC82ETDBK25KQ6PVA3FP6
Run Details
Model:
GPT-4o, Aug. 6th (temp=0)
Test:
Bad Writing Habits
Scenario:
Mystery: examining a crime scene
Duration:
30.1s
Cost:
$0.016100
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="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
Detective Harlow Quinn stepped off the last rung of the rusted ladder, her boots landing with a soft thud on the damp concrete floor of the abandoned Tube station.
The air was thick with
the scent of mildew and something else—something metallic and sharp that set her instincts on edge. She paused, adjusting the collar of her coat against the chill that
seemed to
seep from the
very
walls, and took in the scene before her. The Veil Market, usually a bustling hub of
clandestine
activity, lay eerily silent. Stalls that once brimmed with enchanted trinkets and forbidden potions stood empty, their wares hastily abandoned. The only movement came from the flickering shadows cast by the dim, sputtering lights strung haphazardly along the ceiling. Harlow's sharp brown eyes scanned the area, noting the signs of a hasty evacuation—overturned crates, scattered papers, and a lone shoe lying forlornly in the middle of the walkway. "Detective Quinn," a voice called out,
echoing
off the tiled walls. Harlow turned to see Eva Kowalski emerging from the shadows, her curly red hair a vivid contrast against the gloom. Eva adjusted her round glasses, a nervous habit that Harlow had come to recognize as a sign of unease. The worn leather satchel slung across her shoulder bulged with books, its
weight
pulling her
slightly
off balance. "Eva," Harlow acknowledged, her voice steady. "What have we got?" Eva hesitated, tucking a stray curl behind her ear. "It's... strange, Harlow. The Market was in full swing last night, and then—nothing. E
very
one's gone. But that's not the half of it." She gestured for Harlow to follow, leading her deeper into the station. They passed through a narrow archway, the walls lined with faded posters from a bygone era. The room beyond was larger, its ceiling lost in shadow. In the center, a circle of salt had been meticulously laid out, its edges sharp and unbroken. At its heart lay a small brass compass, its casing tarnished with verdigris, the needle spinning
lazily
in circles. "The Veil Compass," Eva explained, her voice
barely above a whisper
. "It was found here, untouched. But look at the markings." Harlow crouched beside the compass, her eyes narrowing as she examined the sigils
etched
into its face. They were familiar, protective symbols meant to ward off malevolent forces. Yet something about them seemed off, as if they had
been altered
or tampered with. "These sigils," Harlow murmured, tracing a finger over the
intricate
lines. "They're not right. Someone's tried to change them." Eva nodded, her expression troubled. "That's what I thought. But why? And why leave the compass here, of all places?" Harlow rose, her mind racing. The Veil Compass was a tool of immense value, capable of detecting supernatural rifts and portals. Leaving it behind made no sense—unless it
was meant
to be found. "Someone wanted us to see this," Harlow concluded, her voice firm. "But why? And what happened to the Market?" Eva shifted, her eyes darting to the shadows. "There's more. I found traces of blood near the entrance. Not much, but enough to suggest a struggle." Harlow's jaw tightened, memories of her partner, DS Morris, flashing unbidden through her mind. She pushed them aside, focusing on the task at hand. "Show me." They retraced their steps, the silence pressing in around them. Near the entrance, Eva pointed to a dark stain on the floor, barely visible in the dim light. Harlow knelt, examining the area with a practiced eye. The blood was fresh, the droplets scattered in a pattern that suggested a violent encounter. "Whoever it was, they didn't go quietly," Harlow observed, rising to her feet. "But there's no body, no sign of where they went." Eva nodded, her expression grim. "It's like they vanished into thin air." Harlow's mind worked furiously, piecing together the fragments of evidence. The altered sigils, the abandoned compass, the traces of blood—it all pointed to something larger, something that defied easy explanation. She glanced at Eva, noting the tension in her friend's posture. "Eva, you know more about this world than I do. What could cause something like this?" Eva hesitated, her eyes flicking to the compass. "There are... stories. Of rifts that open unexpectedly, swallowing e
very
thing in their path. But they're just that—stories." Harlow considered this, her instincts telling her there was more to the tale. "And if they're not just stories? If someone wanted to open a rift here, why?" Eva shook her head, frustration evident in her voice. "I don't know, Harlow. But whatever it is, it's dangerous. We need to be careful." Harlow nodded, her resolve hardening. She had lost one partner to the unknown; she wouldn't lose another friend. "We'll figure it out, Eva. But first, we need to find out who was here last night and what they were after." They spent the next hour combing through the Market, searching for any clue that might shed light on the mystery. Harlow's sharp eyes missed nothing, cataloging e
very
detail, e
very
anomaly. Yet the more they found, the more questions arose. As they worked, Harlow couldn't shake the feeling that they
were being
watched. The shadows
seemed to
shift and
dance
at the edges of her vision, and
the air was thick with
a tension that set her nerves on edge. She kept her hand close to her sidearm, ready for anything. Finally, as they stood once more in the center of the Market, Eva spoke, her voice low and urgent. "Harlow, look at this." She held out a small object, its surface
gleaming
dully in the dim light. It was a bone token, the kind used to gain en
try to
the Market. But this one was different, its surface
etched
with the same altered sigils as the compass. Harlow took the token, her mind racing. "This is it, Eva. This is what they were after." Eva frowned, confusion clouding her features. "But why? What does it mean?" Harlow turned the token over in her hand, the
weight
of it heavy with implications. "I don't know yet. But I intend to find out." As they made their way back to the surface, Harlow's mind was a whirlwind of possibilities. The evidence didn't add up, but she
was determined
to
unravel
the truth. Whatever had happened in the Veil Market, it was only the beginning. And she would be ready for whatever came next.
created_at
"2026-02-17T02:20:57.368926+00:00"
2/17/2026, 2:20:57 AM
model
"openai/gpt-4o-2024-08-06"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
424
moderation_latency
(null)
generation_time
29989
tokens_prompt
923
tokens_completion
1625
native_tokens_prompt
836
native_tokens_completion
1401
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
0.0161
router
(null)
provider_responses
0
id
"chatcmpl-DA4zKcY4vCQNi5MIaVFNvE49uuWJa"
status
200
is_byok
false
latency
402
endpoint_id
"9d15935a-34e6-4a5e-a5bc-c7dda213e876"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-4o-2024-08-06"
api_type
"completions"
id
"gen-1771294826-65LIcovggYa4CWpmVYvI"
upstream_id
"chatcmpl-DA4zKcY4vCQNi5MIaVFNvE49uuWJa"
total_cost
0.0161
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
77.7778%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
6
adverbTagCount
1
adverbTags
0
"Eva explained, her voice barely above a whisper [barely]"
62.6517%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1071
totalAiIsmAdverbs
4
found
0
adverb
"lazily"
count
1
1
adverb
"slightly"
count
1
2
adverb
"barely above a whisper"
count
1
3
adverb
"very"
count
1
highlights
0
"lazily"
1
"slightly"
2
"barely above a whisper"
3
"very"
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)
6.6293%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1071
totalAiIsms
10
found
0
word
"gleaming"
count
1
1
word
"clandestine"
count
1
2
word
"intricate"
count
1
3
word
"weight"
count
2
4
word
"dance"
count
1
5
word
"echoing"
count
1
6
word
"etched"
count
2
7
word
"unravel"
count
1
highlights
0
"gleaming"
1
"clandestine"
2
"intricate"
3
"weight"
4
"dance"
5
"echoing"
6
"etched"
7
"unravel"
100.0000%
Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches
2
maxInWindow
1
found
0
label
"air was thick with"
count
2
highlights
0
"The air was thick with"
1
"the air was thick with"
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
0
narrationSentences
62
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
0
hedgeCount
3
narrationSentences
62
filterMatches
(empty)
hedgeMatches
0
"seemed to"
1
"try to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
0
totalSentences
80
matches
(empty)
100.0000%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
31
mean
34.35
std
18.34
cv
0.534
sampleLengths
0
76
1
77
2
68
3
10
4
43
5
62
6
21
7
43
8
19
9
20
10
33
11
19
12
26
13
26
14
52
15
23
16
12
17
41
18
16
19
25
20
28
21
24
22
40
23
39
24
51
25
23
26
44
27
17
28
12
29
25
30
50
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
3
totalSentences
62
matches
0
"been altered"
1
"was meant"
2
"was determined"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
1
totalVerbs
142
matches
0
"were being"
99.5778%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
829
adjectiveStacks
0
stackExamples
(empty)
adverbCount
22
adverbRatio
0.026537997587454766
lyAdverbCount
17
lyAdverbRatio
0.020506634499396863
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
80
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
80
mean
13.31
std
6.12
cv
0.46
sampleLengths
0
29
1
21
2
26
3
13
4
16
5
19
6
29
7
11
8
20
9
19
10
18
11
6
12
4
13
9
14
34
15
16
16
10
17
17
18
19
19
11
20
10
21
17
22
11
23
15
24
11
25
8
26
5
27
15
28
5
29
16
30
12
31
11
32
8
33
8
34
18
35
14
36
10
37
2
38
10
39
18
40
9
41
15
42
13
43
10
44
5
45
7
46
10
47
20
48
11
49
16
57.0833%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
1
diversityRatio
0.35
totalSentences
80
uniqueOpeners
28
0.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
6
fancyCount
6
fancyTags
0
"a voice called out, echoing off the tiled walls (call out, echo tiled)"
1
"Harlow acknowledged, her voice steady (acknowledge)"
2
"Eva explained, her voice barely above a whisper (explain)"
3
"Harlow murmured, tracing a finger over the intricate lines (murmur, trace)"
4
"Harlow concluded, her voice firm (conclude)"
5
"Harlow observed, rising to her feet (observe, rise)"
82.5718%