NC Bench
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Run: 2026-02-17-01KHMMG33DXQ7Y4M594DZ108SC
Run Details
Model:
GPT-4o, May 13th (temp=0)
Test:
Bad Writing Habits
Scenario:
Mystery: examining a crime scene
Duration:
17.2s
Cost:
$0.029380
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 and into the dimly lit expanse of the abandoned Tube station beneath Camden. Her boots
echoed
against the cracked tiles, the sound swallowed by the
oppressive
silence of the underground. She adjusted the worn leather
watch
on her left wrist, a habit she had developed over the years, and scanned the area with sharp, brown eyes. The Veil Market was a place she had only heard whispers about, a hidden supernatural black market that moved locations every full moon. Tonight, it was the scene of a crime, and she had
been called
in to investigate.
The air was thick with
the scent of damp earth and something else—something metallic and acrid that set her teeth on edge. "Quinn, over here," called a voice from the shadows. Detective Eva Kowalski emerged, her curly red hair a
stark
contrast to the gloom. She adjusted her round glasses and tucked a stray lock behind her left ear, a nervous habit Harlow had come to recognize. "Eva," Harlow acknowledged, her tone clipped. "What have we got?" Eva gestured to a makeshift stall, its wooden planks splintered and covered in a fine layer of dust. "The victim's over there. Name's
Marcus
Hale, a known trader in enchanted goods. Found him about an hour ago." Harlow approached the stall, her eyes narrowing as she took in the scene.
Marcus
Hale lay sprawled on the ground, his eyes wide open and unseeing. A pool of dark, viscous liquid had formed around his head, and his hands
were clutching
a small brass compass with a patina of verdigris. "Veil Compass," Eva said, noticing Harlow's gaze. "Points toward the nearest supernatural rift or portal. Useful for
navigating
places like this." Harlow crouched beside the body, her sharp jawline set in concentration. "Cause of death?" "Initial assessment suggests poisoning," Eva replied, her voice
tinged
with uncertainty. "But there's something off about it. No signs of struggle, no visible wounds. Just... dead." Harlow's eyes
flicked
to the compass, its face
etched
with protective sigils. "And this? Was it his?" Eva shook her head. "No, it was found clutched in his hand, but according to witnesses, he never dealt in tools. Strictly enchanted goods and alchemical substances." Harlow's mind raced, piecing together the fragments of information. "Who found him?" "A vendor named Lila. She runs a stall selling rare herbs and potions. Said she saw him collapse and called for help." Harlow stood, her bearing military precise. "Where is she now?" Eva pointed to a cluster of stalls in the distance. "Over there, talking to some of the other vendors. She's pretty shaken up." Harlow nodded and made her way toward the group, her eyes scanning the faces for any sign of deceit. Lila was easy to spot, her eyes red-rimmed and her hands trembling as she spoke in hushed tones to a fellow vendor. "Lila," Harlow said, her voice firm but not unkind. "I need to ask you a few questions." Lila looked up, her eyes wide with fear. "I already told the other detective everything I know." "I understand," Harlow replied, her tone softening
slightly
. "But I need to hear it from you directly. Can you walk me through what happened?" Lila took a shaky breath and nodded. "I was setting up my stall when I saw
Marcus
collapse. At first, I thought he had just tripped, but then I saw the blood. I ran over to help, but it was too late. He was already gone." Harlow's
eyes narrowed
. "Blood? There was no mention of blood in the initial report." Lila's face paled. "I-I must have been mistaken. It was dark, and I was scared. Maybe it was just the light playing tricks on me." Harlow's instincts told her otherwise. "Did you see anyone else near
Marcus
before he collapsed?" Lila shook her head. "No, he was alone. But there was something strange... a shadow, moving in the corner of my eye. When I turned to look, it was gone." Harlow's mind raced. A shadow could mean many things in a place like the Veil Market, where supernatural forces were at play. She needed more information. "Thank you, Lila," Harlow said, her tone dismissive. "Stay close. I may have more questions later." As Lila walked away, Harlow turned to Eva. "Something's not right. Lila mentioned blood, but there's no sign of it at the scene. And the shadow... it could be significant." Eva frowned. "You think it was a supernatural attack?" Harlow's eyes hardened. "It's a possibility we can't ignore. We need to find out more about this compass. If it wasn't
Marcus
's, then someone planted it on him. And that someone might still be here." Eva nodded, her freckled complexion pale in the dim light. "I'll start asking around, see if anyone knows where the compass came from." Harlow
watch
ed as Eva moved off, her mind already working through the possibilities. The Veil Market was a place of secrets, and she
was determined
to uncover them all. She returned to the body, her eyes scanning the area for any overlooked clues. The compass was the key, she was sure of it. But why would someone plant it on
Marcus
? And what did it point to? Harlow reached for the compass, her fingers brushing against the verdigris-covered casing. The needle
quivered
, then swung to the left, pointing toward a darkened tunnel at the edge of the market. Her
heart pounded in her chest
as she followed the needle's direction, her steps cautious and deliberate. The tunnel was narrow and damp, the air thick with the scent of decay. She could hear the faint sound of water dripping in the distance, each drop
echoing
like a heartbeat. As she ventured deeper into the tunnel, the compass's needle
began to
spin wildly, as if caught in a
magnetic
field. Harlow's
eyes narrowed
, her senses on high alert. Something was here, something powerful. She reached a small chamber, its walls covered in strange, glowing symbols. In the center of the room stood a figure, cloaked in shadows. Harlow's hand went to her sidearm, her fingers brushing the cool metal of the grip. "Who are you?" she demanded, her voice
echoing
in the chamber. The figure stepped forward, revealing a face shrouded in darkness. "I am the one who seeks balance," the figure replied, their voice a whisper that
seemed to
come from all directions at once. Harlow's
eyes narrowed
. "Did you kill
Marcus
Hale?" The figure shook their head. "No, but I know who did. The compass you hold is a key, a tool to find the truth. But be warned, Detective Quinn, the path you tread is fraught with danger." Harlow's grip tightened on the compass. "Tell me what you know." The figure's eyes glowed with an
otherworldly
light. "
Marcus
Hale was a pawn in a larger game, a game that involves forces beyond your understanding. The compass will lead you to the answers you seek, but you must be prepared to face the darkness that lies ahead." Harlow's jaw set in determination. "I will find the truth, no matter the cost." The figure nodded, their form beginning to fade into the shadows. "Then follow the compass, and may your resolve be your guide." As the figure disappeared, Harlow felt a chill run down her spine. She looked at the compass, its needle now pointing back the way she had come. She
knew that the
path ahead would be difficult, but she was ready. She had to be. With a final glance at the glowing symbols on the walls, Harlow turned and made her way back to the market. She had a mystery to solve, and she wouldn't rest until she had uncovered the truth.
created_at
"2026-02-17T01:47:53.149434+00:00"
2/17/2026, 1:47:53 AM
model
"openai/gpt-4o-2024-05-13"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
310
moderation_latency
(null)
generation_time
16907
tokens_prompt
923
tokens_completion
1934
native_tokens_prompt
836
native_tokens_completion
1680
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
0.02938
router
(null)
provider_responses
0
id
"chatcmpl-DA4TX2zW9Sv0mF4BAKYjnBEt79Id6"
status
200
is_byok
false
latency
276
endpoint_id
"3d6584e7-a2bb-48d6-903d-24e3d90e7e55"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-4o-2024-05-13"
api_type
"completions"
id
"gen-1771292855-VqNzGG1tHvDnvCi5dg6n"
upstream_id
"chatcmpl-DA4TX2zW9Sv0mF4BAKYjnBEt79Id6"
total_cost
0.02938
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
59.2593%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
9
adverbTagCount
2
adverbTags
0
"Harlow replied, her tone softening slightly [slightly]"
1
"the figure replied, their voice a whisper that seemed to come from all directions at once [once]"
92.3077%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1300
totalAiIsmAdverbs
1
found
0
adverb
"slightly"
count
1
highlights
0
"slightly"
80.0000%
AI-ism character names
Target: 0 AI-default names (17 tracked, −20% each)
codexExemptions
(empty)
found
0
"Marcus"
100.0000%
AI-ism location names
Target: 0 AI-default location names (33 tracked, −20% each)
codexExemptions
(empty)
found
(empty)
7.6923%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1300
totalAiIsms
12
found
0
word
"tinged"
count
1
1
word
"flicked"
count
1
2
word
"quivered"
count
1
3
word
"oppressive"
count
1
4
word
"otherworldly"
count
1
5
word
"magnetic"
count
1
6
word
"stark"
count
1
7
word
"echoed"
count
1
8
word
"echoing"
count
2
9
word
"etched"
count
1
10
word
"navigating"
count
1
highlights
0
"tinged"
1
"flicked"
2
"quivered"
3
"oppressive"
4
"otherworldly"
5
"magnetic"
6
"stark"
7
"echoed"
8
"echoing"
9
"etched"
10
"navigating"
0.0000%
Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches
5
maxInWindow
4
found
0
label
"heart pounded in chest"
count
1
1
label
"eyes widened/narrowed"
count
3
2
label
"air was thick with"
count
1
highlights
0
"heart pounded in her chest"
1
"eyes narrowed"
2
"The air was thick with"
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
0
narrationSentences
72
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
1
hedgeCount
2
narrationSentences
72
filterMatches
0
"watch"
hedgeMatches
0
"began to"
1
"seemed to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
1
totalSentences
102
matches
0
"knew that the"
100.0000%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
46
mean
28.17
std
14.27
cv
0.506
sampleLengths
0
68
1
61
2
45
3
10
4
37
5
51
6
21
7
14
8
26
9
17
10
27
11
12
12
22
13
10
14
23
15
41
16
17
17
17
18
24
19
46
20
14
21
25
22
15
23
30
24
26
25
16
26
30
27
9
28
35
29
23
30
29
31
38
32
31
33
49
34
34
35
39
36
11
37
33
38
8
39
37
40
11
41
47
42
14
43
22
44
44
45
37
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
2
totalSentences
72
matches
0
"been called"
1
"was determined"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
1
totalVerbs
148
matches
0
"were clutching"
100.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
824
adjectiveStacks
0
stackExamples
(empty)
adverbCount
12
adverbRatio
0.014563106796116505
lyAdverbCount
6
lyAdverbRatio
0.007281553398058253
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
102
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
102
mean
12.71
std
7.87
cv
0.62
sampleLengths
0
25
1
17
2
26
3
23
4
16
5
22
6
9
7
14
8
22
9
6
10
4
11
18
12
19
13
13
14
13
15
25
16
7
17
14
18
11
19
3
20
11
21
15
22
12
23
5
24
4
25
23
26
9
27
3
28
22
29
6
30
4
31
10
32
13
33
19
34
22
35
9
36
8
37
8
38
9
39
8
40
16
41
7
42
39
43
3
44
11
45
3
46
22
47
5
48
10
49
4
53.2680%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
4
diversityRatio
0.3431372549019608
totalSentences
102
uniqueOpeners
35
8.3333%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
9
fancyCount
6
fancyTags
0
"Harlow acknowledged, her tone clipped (acknowledge, clip)"
1
"Eva said, noticing Harlow's gaze (say, notice)"
2
"Eva replied, her voice tinged with uncertainty (reply, tinged)"
3
"Harlow replied, her tone softening slightly (reply, soften slightly)"
4
"demanded (demand)"
5
"the figure replied, their voice a whisper that seemed to come from all directions at once (reply, seem come)"
76.5212%