NC Bench
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Run: 2026-02-17-01KHMRA4TWBH76SW18JMNGGTHJ
Run Details
Model:
Gemini 2.5 Pro
Test:
Bad Writing Habits
Scenario:
Mystery: examining a crime scene
Duration:
44.0s
Cost:
$0.043674
Provider:
Google AI Studio
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
The air tasted of damp earth, ozone, and something else, something cloying and sweet like burnt sugar and decay. Detective Harlow Quinn ducked under the blue-and-white tape, her worn leather
watch
catching the harsh glare of the portable floodlights. The beams cut sharp, artificial cones through the gloom of the abandoned Tube station, illuminating a scene of
calculated
chaos. This wasn’t a crime scene. It was a violation of one. Stalls crafted from scavenged platform signs and petrified driftwood lined the wide, curved tunnel. Jars of what looked like glowing fungi cast a sickly green light on empty shelves. Shackles that hummed with a faint, static energy lay on a
velvet
cloth next to stacks of yellowed scrolls. The place felt like a secret history of London, the kind that never made it into the books. A marketplace for ghosts and whispers. DC Hayes met her at the edge of the forensics circle, his youthfully earnest face looking pale and wrong in the subterranean twilight. “Guv. Nasty one.” “They’re all nasty, Hayes. Give me the summary.” Quinn’s voice was flat, her gaze already sweeping the area, cataloging every detail with the military precision that had defined her eighteen years on the force. “Victim’s name is Silas Croft. Known associate, middling information broker, according to the files. Uniforms got the call from a public phone about an hour ago. Anonymous tip.” Hayes gestured toward the center of the largest stall, a space that looked more like an alchemist’s study than a merchant’s cart. “ME’s preliminary puts time of death around three hours ago. No obvious cause. No wounds, no signs of a struggle. Looks like he just… fell asleep.” Quinn strode past him, her boots crunching on something that glittered like crushed amethyst. The victim, Silas Croft,
was slumped
in a high-backed wooden chair, head lolled to one side. He was a small man with thin, grey hair and a meticulously trimmed beard. His eyes
were closed
, his face placid. He could have been napping, if not for the absolute stillness and the waxy pallor of his skin. “No struggle, you said.” Quinn’s sharp jaw was tight. She knelt, careful not to disturb anything inside the taped-off area. The air was colder here, a pocket of deep, unnatural chill. “Cash box is open and empty. Obvious motive.” “That’s what I’m thinking,” Hayes agreed, a little too
quickly
. “Robbery gone wrong. Maybe the shock of it gave him a heart attack. He wasn’t a young man.” Quinn didn’t answer. Her brown eyes moved over the desk. A bottle of ink, impossibly black, stood uncapped beside a raven’s feather quill. A stack of coins made of a dull, grey metal sat untouched. A silver locket on a heavy chain lay next to them, its surface
etched
with symbols that made her eyes water if she looked too long. Valuable things. Things a common thief would grab
without a second thought
. Yet they remained. She rose and circled the stall. “Where’s the witness who found him?” “Over there.” Hayes nodded towards the station entrance, where a young woman sat on an upturned crate, a regulation grey blanket draped over her shoulders. “Eva Kowalski. Research assistant at the British Museum. Says she was down here buying a rare manuscript for her… personal collection.” Quinn raised an eyebrow. “A British Museum researcher shops in a place like this?” “Claims she’s a historian. Said this market is a good source for primary documents that haven’t been, uh, ‘sanitized’.” Quinn walked over to the young woman. Up close, she could see the spray of freckles across her nose and the intelligent fear in her green eyes, magnified by round glasses. A worn leather satchel, stuffed to bursting with books, sat at her feet. Her curly red hair was a chaotic halo in the
stark
police lighting. She
was tucking
a stray curl behind her left ear, a gesture she repeated twice more as Quinn approached. “Ms. Kowalski. I’m Detective Quinn.” “I… yes. I told the other officer everything.” Her voice was steady, but her hands
trembled
where they clutched a cup of lukewarm tea. “Tell me again,” Quinn said, her tone leaving no room for argument. “What were you doing here?” “I was meeting Silas. He’d sourced a copy of the *Ars Notoria*, a sixteenth-century grimoire. It’s… significant for my research into pre-Enlightenment magical traditions.” She said the words as if reciting a well-rehearsed line. “You came alone?” “Yes. It’s safer that way. The people here… they don’t like outsiders.” “And you found him like this?” Eva nodded, her gaze fixed on the concrete floor. “The stall was dark. I called his name. When he didn’t answer, I stepped inside and… and I found him. I checked his pulse. There was nothing. Then I ran. I found a phone box topside and called.” Quinn stared at her, letting the silence stretch. Eva Kowalski wasn’t a good liar. She was an academic, used to the shelter of libraries and archives, and the raw strangeness of this place—or perhaps the lie itself—
was making
her fray at the edges. “Forensics found only one set of recent prints inside the stall, belonging to the victim,” Quinn stated,
watch
ing the woman’s reaction. “They found yours on the edge of the desk, where you said you touched it. But they found no one else’s. If he was robbed, the thief was wearing gloves.” “I… I don’t know anything about that.” Eva tucked the errant curl behind her ear again. Quinn left her and returned to the body. Something glinted under the edge of Silas’s chair, half-hidden by a dark fold of his cloak. Using a pen from her jacket, Quinn nudged it out. It was a small brass compass, no bigger than a pocket
watch
. A patina of verdigris clung to its casing, and the glass face
was etched
with a ring of interlocking sigils. It didn’t look like any compass she’d ever seen. She crouched and picked it up with a gloved hand. The needle
wasn’t pointing
north. In fact, it
wasn’t pointing
in any direction at all. It spun
lazily
, as though unmoored from the world’s
magnetic
field. “What’s
that, Guv
?” Hayes asked, peering over her shoulder. “Don’t know. A personal effect.” “Some kind of steampunk nonsense. The stalls are full of it.” He dismissed it with a wave. “Let’s bag it with the rest of his belongings.” Quinn held it a moment longer. The brass was cold, but a faint vibration hummed through the glove into her palm. On instinct, she angled the compass, sweeping it across the stall. The needle continued its aimless spin. Then she pointed it toward the back of the little alcove, a solid wall of Victorian brickwork slick with damp. The needle snapped to attention. It stopped spinning and pointed, dead straight, at the center of the wall. It
quivered
with a frantic, living energy. Quinn’s
blood ran cold
. The low hum in her hand intensified. It was a feeling she hadn’t felt in three years. Not since the night she’d lost her partner, DS Morris, in a warehouse down by the docks. A night of shadows that moved when no one
was watching
and a crime scene that made no logical sense. A night that had ended with Morris gone and a single, impossible word whispered on the wind. She stood up, her movements stiff. She walked back to Eva Kowalski, holding the compass flat on her palm. “What is this?” Eva’s
eyes widened
at the sight of the object. The practiced composure she’d been clinging to finally shattered. The color drained from her face, leaving her freckles standing out like flecks of rust. “Where did you
find that?” she
whispered. “That’s not what I asked.” Quinn’s voice was low and dangerous. She stepped closer, lowering the compass so only Eva could see it clearly. The needle was still straining towards the back wall of Silas’s stall. “This is a Veil Compass, isn’t it? It points to supernatural rifts.” The words felt alien and absurd on her tongue, the kind of language that belonged in the musty books Eva Kowalski studied, not in a murder investigation. But the solid
weight
of the compass in her hand and the memory of Morris’s final, terrified shout told her she was right. Eva shook her head, but it was a gesture of panic, not denial. She clutched her satchel, her knuckles white. “I don’t… I can’t…” “Here’s what I see, Ms. Kowalski,” Quinn said, her voice barely a murmur. “I see a man dead with no cause. I see valuable items left behind, but an empty cash box to make it look like a simple robbery. I see a witness who knows more than she’s saying. And I see this.” She held up the compass. “A tool that points to a wall. A thief who left no prints and a victim who wasn’t struggled with. They didn’t come through the front of the stall, did they? And they didn’t
leave that way
either.” Hayes
was watching
them, a confused frown on his face, too far away to hear. To him, this was a simple, if odd, case. A heart attack during a robbery in a bizarre flea market. It would be closed and filed. But Quinn knew better. The spinning needle and the cold spot in the air told a different story. This wasn’t a robbery gone wrong. This was an execution. And the killer hadn’t walked away. They had vanished through a door that no one else could see. A door that was still, perhaps, faintly open. Quinn pocketed the Veil Compass. Its faint hum felt like a premonition against her hip. The case was no longer about Silas Croft, information broker. It was about that brick wall, and the cold dread that was a ghost of a memory from three years ago. She had a lead, an impossible, insane lead, and for the first time since Morris died, the world felt sharp and terrifyingly real again.
created_at
"2026-02-17T02:54:59.475515+00:00"
2/17/2026, 2:54:59 AM
model
"google/gemini-2.5-pro"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1937
moderation_latency
(null)
generation_time
43983
tokens_prompt
923
tokens_completion
3542
native_tokens_prompt
883
native_tokens_completion
4257
native_tokens_completion_images
0
native_tokens_reasoning
1995
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
0.04367375
router
(null)
provider_responses
0
status
200
is_byok
false
latency
1937
endpoint_id
"b261d15b-95ce-4c8c-8bce-00eb0dc1ff77"
provider_name
"Google AI Studio"
model_permaslug
"google/gemini-2.5-pro"
api_type
"completions"
id
"gen-1771296854-QcdeedNv7CBPxJK5kc8p"
upstream_id
(null)
total_cost
0.04367375
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
38.0952%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
7
adverbTagCount
2
adverbTags
0
"Hayes agreed, a little too quickly [too quickly]"
1
"Quinn said, her voice barely a murmur [barely]"
88.0881%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1679
totalAiIsmAdverbs
2
found
0
adverb
"lazily"
count
1
1
adverb
"quickly"
count
1
highlights
0
"lazily"
1
"quickly"
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)
46.3967%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1679
totalAiIsms
9
found
0
word
"trembled"
count
1
1
word
"quivered"
count
1
2
word
"velvet"
count
1
3
word
"calculated"
count
1
4
word
"magnetic"
count
1
5
word
"stark"
count
1
6
word
"weight"
count
1
7
word
"etched"
count
2
highlights
0
"trembled"
1
"quivered"
2
"velvet"
3
"calculated"
4
"magnetic"
5
"stark"
6
"weight"
7
"etched"
33.3333%
Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches
3
maxInWindow
3
found
0
label
"blood ran cold"
count
1
1
label
"eyes widened/narrowed"
count
1
2
label
"without second thought"
count
1
highlights
0
"blood ran cold"
1
"eyes widened"
2
"without a second thought"
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
0
narrationSentences
104
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
2
hedgeCount
0
narrationSentences
104
filterMatches
0
"watch"
hedgeMatches
(empty)
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
3
totalSentences
125
matches
0
"that, Guv"
1
"find that?” she"
2
"leave that way"
100.0000%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
43
mean
38.84
std
25.1
cv
0.646
sampleLengths
0
70
1
72
2
26
3
34
4
76
5
69
6
39
7
28
8
76
9
12
10
46
11
14
12
19
13
76
14
5
15
24
16
17
17
34
18
3
19
12
20
6
21
47
22
43
23
51
24
16
25
75
26
36
27
9
28
5
29
26
30
58
31
5
32
20
33
75
34
22
35
40
36
48
37
50
38
24
39
97
40
59
41
36
42
70
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
3
totalSentences
104
matches
0
"was slumped"
1
"were closed"
2
"was etched"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
6
totalVerbs
189
matches
0
"was tucking"
1
"was making"
2
"wasn’t pointing"
3
"wasn’t pointing"
4
"was watching"
5
"was watching"
100.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
1223
adjectiveStacks
0
stackExamples
(empty)
adverbCount
38
adverbRatio
0.03107113654946852
lyAdverbCount
13
lyAdverbRatio
0.01062959934587081
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
125
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
125
mean
13.36
std
8.84
cv
0.662
sampleLengths
0
19
1
20
2
20
3
5
4
6
5
14
6
15
7
19
8
18
9
6
10
23
11
3
12
34
13
50
14
26
15
14
16
16
17
14
18
7
19
18
20
9
21
11
22
11
23
8
24
10
25
18
26
3
27
7
28
13
29
12
30
26
31
2
32
10
33
3
34
6
35
6
36
25
37
21
38
4
39
10
40
19
41
7
42
24
43
13
44
13
45
19
46
5
47
24
48
12
49
5
63.7333%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
7
diversityRatio
0.416
totalSentences
125
uniqueOpeners
52
32.1429%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
7
fancyCount
4
fancyTags
0
"Hayes agreed, a little too quickly (agree)"
1
"Quinn said, her tone leaving no room for argument (say, leave)"
2
"Quinn stated, watching the woman’s reaction (state, watch)"
3
"whispered (whisper)"
82.4582%