NC Bench
Overview
About
Tests
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Vendors
Run: 2026-02-17-01KHMPEKE7VNW9EFJ5RENF0YDH
Run Details
Model:
GPT-4o, Aug. 6th (temp=1)
Test:
Bad Writing Habits
Scenario:
Mystery: examining a crime scene
Duration:
36.2s
Cost:
$0.016610
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 emerged from the underground passage into the stale, electric-
tinged
air of The Veil Market. The Market, hidden beneath the façade of an abandoned Tube station in Camden, str
etched
out before her in a labyrinth of makeshift stalls and dimly lit alcoves. Only the clink of rare metals and the hushed barter of illicit traders disturbed the musty quiet, save for the faint drip of water trickling from the unseen pipes above. It wasn't the first time Harlow had infiltrated a place like this, but today was different. Today, it was a crime scene. Her breath turned visible in the chill of the underground air, mixing with strands of shadows that
flickered
in the unreliable glow of mismatched bulbs. She adjusted the worn leather
watch
on her left wrist, its familiar
weight
reassuring against her skin, as she moved with the military precision
etched
into her bones. Eva Kowalski waited for her near a cluster of crates marked with the symbol of a crow in flight. The young woman's curly red hair was a
beacon
against the dark, her round glasses perched on a freckled nose. Even with the air of
clandestine
commerce around them, she
was tucking
strands of hair
nervously
behind her ear, the way she always did when something itched at the back of her mind. "Detective," Eva greeted, her voice a blend of relief and urgency. Her satchel, stuffed with books as usual, dangled at her hip like a
weight
. "I'm glad you came." Harlow's
eyes narrowed
slightly
. "What have you got for me, Eva? I've been told something unusual's gone down." Eva adjusted her glasses, her green eyes sharp behind the lenses. "It's over here. One of the vendors found it this morning." The pair wound their way through the bustling stalls, the
tantalizing
scent of exotic spices teasing their noses, until they reached a secluded corner swathed in shadow. A patch of floor, marked off with a perimeter of dull red tape, was the focus. The stall itself was an assemblage of crates and tarps, but it was what lay inside that had drawn her here—a body, face ghostly pale, strangely untouched by the grime of the Market. The victim was a young man, unremarkable in appearance, dressed in ordinary street clothes that seemed out of place in this eldritch bazaar. His expression was serene, almost as if peaceful slumber had claimed him; only the unnatural stillness betrayed the truth. Eva hesitated a step behind as Harlow knelt beside the body, her brown eyes scanning the scene with meticulous care. "There's no sign of violence," Eva observed, her voice soft. "And nothing stolen." Harlow nodded, eyes alighting on the small brass object clutched in the young man's hand—a Veil Compass, its verdigris casing and sigil-marked face distinct even in the dim light. The needle, she noticed, pointed unwaveringly towards his chest. It was peculiar. Normally, the Compass would guide its bearer towards the nearest supernatural rift or portal, reacting to energies unseen by ordinary means. This inertia of the needle, however, suggested a
profound
disturbance, something anchored within. "Why didn't anyone report this sooner?" Harlow asked, rising to a stand, eyes still absorbing the surroundings. "The Market," Eva replied, a touch of frustration mingling with understanding in her voice. "They move with the moon. Secrets here, people cover up." "Right." Harlow rubbed her jaw, her mind mapping possibilities. "Someone needs to know more about how he ended up here." "The vendor who found him is... reluctant to talk," Eva said, throwing a quick glance towards the man, crouched and fidgeting among the shadows. His gaze skittered from them when he realized they
were discussing
him. Harlow crossed to the vendor, drawing upon the
weight
of her authority. "I need you to tell me what you know," she said, voice steady, yet unyieldingly soft. The vendor swallowed hard, eyes flitting
nervously
between Harlow and the retreat of shadows along the walls. "Saw him... saw him late last night, wandering. Thought maybe he was lost. Happens sometimes, folks getting turned around." "And this Compass?" Harlow inclined her head towards the brass object. "He’d had it all along?" The vendor shook his head, more certain now. "No, didn't see it at first. Showed after... after he was gone. Can't say how, I swear it." "There're signs it appeared when he passed," Eva murmured, coming up beside Harlow. "His body shows no transport, no alteration. Just... stopped." Harlow studied the vendor for a beat longer, then returned to the body, the questions assembling themselves in a pattern she didn’t yet fully grasp. Her eyes fell again on the Compass, its needle stubbornly affixed in its supernatural orientation. "What if," Harlow speculated aloud, "he wasn’t trying to find something, but running away from it?" Eva considered the notion, her eyes catching light in a reflective flash. "The Compass reacted to something nearby, perhaps? But no other rifts showed up on the census I checked earlier." Harlow crouched once more, her senses attuned to the faintest of disturbances. The shadows here seemed different, languid and pervasive, crawling with the flickers of unseen energies. She sensed a dissonance, something wrong—like the
resonance
of a note just
slightly
off-key. "Maybe we’re looking at this wrong," Harlow said. "If the needle's drawn to him, beneath flesh lies something we can’t see. We need to take him into secure custody, search for what others have missed." Eva nodded
slowly
, almost begrudgingly. She would rather pore over the texts in her archives, unearthing meaning through pages and ink. But Harlow had learned to trust her instincts, and Eva, sensing this, accepted the detective’s judgment with a measure of faith. "I'm curious about the vendor's story," Eva said, casting a suspicious glance back. "Still, this man's presence here means the Market is compromised, isn’t it? Something threaded within a
tapestry
of deceit." "Secrets without end," Harlow confirmed, her throat tight. "We'll bring him topside for the coroner. There’s more here than just a lifeless body." As the full moon crept near, signaling the Market’s imminent relocation, the passages of the underground world breathed restlessly around them. Harlow and Eva, flanked by truth and intangible whispers, began their ascent toward the world above, where daylight and inquiry awaited. The depths of The Veil Market knew many secrets, wrapped in dark silence and
echoing
whisper. But Harlow carried with her a determination to
unravel
the cloak of mystery, piece by precise piece, until the whole truth lay unveiled in the light. And as the paths unfolded, so too did the lingering specter of the supernatural—the forgotten chord she’d become in tune with, chasing the specter of a partner lost.
created_at
"2026-02-17T02:22:20.233261+00:00"
2/17/2026, 2:22:20 AM
model
"openai/gpt-4o-2024-08-06"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
384
moderation_latency
(null)
generation_time
36134
tokens_prompt
923
tokens_completion
1756
native_tokens_prompt
836
native_tokens_completion
1452
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
0.01661
router
(null)
provider_responses
0
id
"chatcmpl-DA50Z4wOszqslEirdED9otPaDdg1M"
status
200
is_byok
false
latency
373
endpoint_id
"9d15935a-34e6-4a5e-a5bc-c7dda213e876"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-4o-2024-08-06"
api_type
"completions"
id
"gen-1771294903-LtVJHfq2VxQfnJPgvWXT"
upstream_id
"chatcmpl-DA50Z4wOszqslEirdED9otPaDdg1M"
total_cost
0.01661
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
11
adverbTagCount
1
adverbTags
0
"she said, voice steady, yet unyieldingly soft [unyieldingly]"
55.3172%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1119
totalAiIsmAdverbs
5
found
0
adverb
"nervously"
count
2
1
adverb
"slightly"
count
2
2
adverb
"slowly"
count
1
highlights
0
"nervously"
1
"slightly"
2
"slowly"
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
1119
totalAiIsms
14
found
0
word
"tapestry"
count
1
1
word
"beacon"
count
1
2
word
"tinged"
count
1
3
word
"resonance"
count
1
4
word
"flickered"
count
1
5
word
"clandestine"
count
1
6
word
"profound"
count
1
7
word
"tantalizing"
count
1
8
word
"weight"
count
3
9
word
"echoing"
count
1
10
word
"etched"
count
1
11
word
"unravel"
count
1
highlights
0
"tapestry"
1
"beacon"
2
"tinged"
3
"resonance"
4
"flickered"
5
"clandestine"
6
"profound"
7
"tantalizing"
8
"weight"
9
"echoing"
10
"etched"
11
"unravel"
100.0000%
Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches
1
maxInWindow
1
found
0
label
"eyes widened/narrowed"
count
1
highlights
0
"eyes narrowed"
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
0
narrationSentences
55
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
1
hedgeCount
0
narrationSentences
55
filterMatches
0
"watch"
hedgeMatches
(empty)
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
0
totalSentences
69
matches
(empty)
96.6507%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
30
mean
37.1
std
18.12
cv
0.488
sampleLengths
0
74
1
75
2
72
3
29
4
18
5
22
6
76
7
42
8
33
9
38
10
37
11
17
12
24
13
20
14
36
15
28
16
36
17
16
18
26
19
22
20
40
21
16
22
31
23
41
24
35
25
42
26
32
27
23
28
42
29
70
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
0
totalSentences
55
matches
(empty)
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
2
totalVerbs
134
matches
0
"was tucking"
1
"were discussing"
93.3056%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
864
adjectiveStacks
1
stackExamples
0
"stale, electric-tinged air"
adverbCount
28
adverbRatio
0.032407407407407406
lyAdverbCount
18
lyAdverbRatio
0.020833333333333332
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
69
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
69
mean
16.13
std
7.39
cv
0.458
sampleLengths
0
17
1
27
2
30
3
16
4
6
5
25
6
28
7
19
8
20
9
33
10
11
11
14
12
4
13
4
14
14
15
11
16
11
17
27
18
16
19
33
20
23
21
19
22
20
23
10
24
3
25
29
26
9
27
3
28
21
29
13
30
17
31
14
32
10
33
9
34
11
35
24
36
12
37
12
38
16
39
17
40
19
41
11
42
5
43
8
44
18
45
13
46
9
47
25
48
15
49
16
75.8454%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
1
diversityRatio
0.463768115942029
totalSentences
69
uniqueOpeners
32
0.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
11
fancyCount
9
fancyTags
0
"Eva greeted, her voice a blend of relief and urgency (greet, voice)"
1
"Eva observed, her voice soft (observe)"
2
"Eva replied, a touch of frustration mingling with understanding in her voice (reply, mingle)"
3
"Eva said, throwing a quick glance towards the man, crouched and fidgeting among the shadows (say, throw crouch fidget)"
4
"she said, voice steady, yet unyieldingly soft (say, voice)"
5
"Eva murmured, coming up beside Harlow (murmur, come up)"
6
"Harlow speculated aloud (speculate)"
7
"Eva said, casting a suspicious glance back (say, cast)"
8
"Harlow confirmed, her throat tight (confirm)"
83.5952%