NC Bench
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Run: 2026-02-17-01KHMMEFRJMZD931VGR8EVDK8W
Run Details
Model:
Cohere Command R+ (Aug. 2024)
Test:
Bad Writing Habits
Scenario:
Thriller: chase through city streets
Duration:
1m 3s
Cost:
$0.020778
Provider:
Cohere
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
The rain pounded on the windshield, distorting the city's neon glow, as Detective Harlow Quinn
navigated
her unmarked car through the crowded streets of London. The suspect, a wanted fugitive named Silas, had
been spotted
moments ago near Piccadilly Circus. Silas
was known
for his connections to the supernatural underworld, and Harlow suspected he was the key to cracking a stringive of mysterious cases that had plagued the force for years. She gripped the steering wheel
tightly
, her knuckles turning white, as she weaved through the heavy traffic. The wipers struggled to keep up with the downpour, creating a stuttered, distorted view of the streets. Harlow's
heart pounded in her chest
; the adrenaline coursed through her veins, sharpening her senses. Her keen eyes scanned the crowds, searching for any sign of her elusive prey. A sudden movement on the pavement ahead caught her attention. A figure darted into a narrow alley, its face hidden beneath a black hood. Harlow swore under her breath; she'd found her suspect. She hit the brakes, the tires screeching in protest, and brought the car to an abrupt stop at a red light. Ignoring the angry honks behind her, Harlow threw open the door and leaped out, her eyes never leaving the shadowy alley. The chase was on. Harlow sprinted into the alley, her polished leather shoes splashing through puddles that had formed in the uneven pavement. The smell of wet concrete and garbage filled her nostrils as she ran, her breath coming in short gasps. The figure ahead of her was fast, disappearing around a corner, but Harlow's military precision and years of training gave her an edge. As she turned the corner, she caught a glimpse of Silas's black coat as he descended a set of concrete stairs leading into the underground. Harlow's pulse quickened; the chase
was leading
her into unknown territory. The Veil Market, an infamous black market rumored to cater to the supernatural,
was said
to be held in a different abandoned station each full moon. Tonight, it seemed, it was right beneath her feet. She slowed her pursuit, taking the stairs with care, her damp palms sliding along the rusty railing. As she descended, the sound of her
footsteps
echoing
off the grimy walls, she
began to
question her decision. The market was notorious for its illicit trades and dangerous clientele. She thought of her partner, DS Morris, who had disappeared in the midst of a similar investigation years ago. Their case, involving the deaths of several individuals with ties to the occult, had led them down dark paths, paths from which Morris never returned. Harlow could still recall the feelings of helplessness and fear that had consumed her then. But Silas was too valuable to let slip away. He was her link to the hidden world she'd been hunting for years—a world she now believed had a part in DS Morris's death. Her eyes darted around the station platform, observing the patrons and vendors who were
slowly
gathering for the night's market activities. The place already buzzed with
anticipation
, its energy crackling in the air. A burly man in a long overcoat, his face obscured by the shadows of a wide-brimmed hat, glanced in her direction. A shiver ran down Harlow's spine as their eyes locked briefly before he turned away. She felt exposed, vulnerable. She had let her pursuit of Silas cloud her usual caution. Now, entering the heart of the Veil Market, she was as inconspicuous as a neon sign. But she couldn't turn back now. Harlow made her way towards the market stalls, her hand resting on the worn leather of her holster, ready to draw her weapon at any sign of trouble. The air thickened with the scent of incense, mingling with the pungent odors of damp earth and something more feral. She wove through the growing crowd, not knowing which among them were mortal, which were not, and which might be the mysterious Silas. She passed stalls selling peculiar artifacts: ancient tomes bound in skin, vials of iridescent liquids promising eternal youth or instant transformations, and weapons forged with forbidden magics. Harlow's detective's instinct buzzed as she noted the positions of the stalls and the items each offered—vital information for the Metropolitan Police, if she could get it out alive. A commotion erupted at the other end of the platform, drawing the detective's attention. A scuffle had broken out, its center marked by a burgeoning frenzy of movement and cries. Harlow pushed her way through the crowd, the people already packed too
tightly
for haste. By the time she reached the edge of the disturbance, it was over. At the heart of it stood a tall figure, his features obscured by shadows and the steam rising from the platform's grates. Silas. The crowd, including Silas,
began to
disperse, melting back into the market's chaos. Harlow started after him, but a hand on her shoulder stopped her short. She spun around, her hand reaching for her gun, to find Tomás Herrera, the former paramedic now turned healer to the supernatural, gazing at her with his warm brown eyes. "Detective Quinn," he greeted her, his voice calm despite the chaotic energy of the market. "This is not your usual beat." For a moment, Harlow stood frozen, her suspicion warring with the relief at seeing a familiar face. Tomás was a confidant, one of the few people she trusted with the knowledge of her hunt for the supernatural. He'd provided invaluable insights into London's underworld, and his skills had saved lives, even if his methods had cost him his medical license. "Herrera," she acknowledged, lowering her hand from her holster. "I could say the same to you." Tomás smiled, his expression fraught with
unspoken
meaning. "I could not resist the market's allure. It's a cornucopia of rare herbs and artifacts. Plus, my services are always in demand here." He lifted his wrist, showing a fresh bandage over the knife scar on his forearm. "As you can see, my talents are appreciated." "The Shadow Market, Silas—they're all connected, aren't they?" Harlow asked, choosing her words
carefully
. They were not alone, and she was all too aware of the many unfriendly ears in their vicinity. "This is about the Necronomicon. You believe it, too." Tomás's gaze dropped to the bone token dangling from his fingertips. The
macabre
coin, Harlow knew, was the price of entry into the Veil Market. It was an invitation, a sign of trust, passed between members of the supernatural community. Tomás's possession of one meant he had friends in dark places. "I do," Tomás admitted. "And so do you. I can see the same look in your eyes that I saw when we discussed your partner's disappearance. You believe this book holds the key to some greater puzzle." Harlow nodded, her jaw set in determination. "Silas is my way into that world. He's a dealer, a trafficker in dark artifacts. If I can catch him, I can finally get some answers." "Even if it means entering the lion's den?" Tomás asked. His grip tightened on the bone token as his eyes scanned the crowd, lingering on the varied patrons and vendors. "This market is not just a hub for enchanted trinkets and street medicine. It's a hotbed of deals and debts, some of which are measured in souls. There are more powerful forces at play here, Detective, forces that have no respect for mortal lives." "I appreciate your concern," Harlow said, her voice steel, "but I've
navigated
worse. Silas is my lead; I can't lose him." A distant rumble shook the old station's walls, reverberating through the bodies of those present. The market fell silent; all eyes turned to the tunnel's mouth, where the next train would soon arrive—a train the mortals on the platform would not see. As the crowd stirred, Tomás leaned in, his eyes fixed on hers. "Be careful, Detective. If what you seek is here, it's not going to be an easy find. And I think you know that if you're not careful, what happened to DS Morris could
very
well happen again." Before she could respond, he had slipped away, his dark head vanishing into the sea of capes and hoods. Harlow's
eyes narrowed
, her hand falling to her holster once more. She knew Tomás was right. She was out of her depth, but she had no intention of abandoning her pursuit. She made her way through the crowd, her eyes never straying from her target. Silas had a unique gait, a subtle limp that was his signature. She would
follow that sign
if she had to, even if it took her deeper underground, further from the light of justice than she'd ever gone before.
created_at
"2026-02-17T01:47:46.702683+00:00"
2/17/2026, 1:47:46 AM
model
"cohere/command-r-plus-08-2024"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
271
moderation_latency
117
generation_time
63081
tokens_prompt
914
tokens_completion
2183
native_tokens_prompt
831
native_tokens_completion
1870
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
0.0207775
router
(null)
provider_responses
0
id
"9ba9dd28-fc33-4e0c-b15f-91175ec44e00"
status
200
is_byok
false
latency
271
endpoint_id
"cd63714a-d459-4806-bdf2-0dfea4f6614c"
provider_name
"Cohere"
model_permaslug
"cohere/command-r-plus-08-2024"
api_type
"completions"
id
"gen-1771292802-RctKIidfVYMGq8NKd6Ry"
upstream_id
"9ba9dd28-fc33-4e0c-b15f-91175ec44e00"
total_cost
0.0207775
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Cohere"
Evaluation details
Result
Evaluator
Details
Meta Data
100.0000%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
6
adverbTagCount
0
adverbTags
(empty)
65.7769%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1461
totalAiIsmAdverbs
5
found
0
adverb
"carefully"
count
1
1
adverb
"slowly"
count
1
2
adverb
"tightly"
count
2
3
adverb
"very"
count
1
highlights
0
"carefully"
1
"slowly"
2
"tightly"
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)
52.0876%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1461
totalAiIsms
7
found
0
word
"macabre"
count
1
1
word
"unspoken"
count
1
2
word
"anticipation"
count
1
3
word
"footsteps"
count
1
4
word
"echoing"
count
1
5
word
"navigated"
count
2
highlights
0
"macabre"
1
"unspoken"
2
"anticipation"
3
"footsteps"
4
"echoing"
5
"navigated"
100.0000%
Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches
2
maxInWindow
1
found
0
label
"heart pounded in chest"
count
1
1
label
"eyes widened/narrowed"
count
1
highlights
0
"heart pounded in her chest"
1
"eyes narrowed"
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
0
narrationSentences
78
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
0
hedgeCount
2
narrationSentences
78
filterMatches
(empty)
hedgeMatches
0
"began to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
1
totalSentences
86
matches
0
"follow that sign"
96.8840%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
29
mean
50.21
std
24.56
cv
0.489
sampleLengths
0
71
1
63
2
75
3
4
4
61
5
71
6
106
7
66
8
67
9
6
10
71
11
56
12
80
13
1
14
56
15
21
16
60
17
16
18
54
19
41
20
51
21
37
22
33
23
74
24
21
25
42
26
49
27
50
28
53
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
3
totalSentences
78
matches
0
"been spotted"
1
"was known"
2
"was said"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
1
totalVerbs
195
matches
0
"was leading"
100.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
1230
adjectiveStacks
0
stackExamples
(empty)
adverbCount
24
adverbRatio
0.01951219512195122
lyAdverbCount
8
lyAdverbRatio
0.0065040650406504065
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
86
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
86
mean
16.93
std
8.2
cv
0.484
sampleLengths
0
25
1
15
2
31
3
17
4
17
5
15
6
14
7
10
8
14
9
9
10
21
11
21
12
4
13
19
14
19
15
23
16
25
17
11
18
26
19
9
20
17
21
19
22
11
23
19
24
25
25
15
26
9
27
24
28
21
29
12
30
21
31
15
32
4
33
11
34
16
35
6
36
28
37
20
38
23
39
27
40
29
41
14
42
16
43
15
44
13
45
22
46
1
47
13
48
13
49
30
43.7984%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
9
diversityRatio
0.32558139534883723
totalSentences
86
uniqueOpeners
28
50.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
6
fancyCount
3
fancyTags
0
"he greeted her, his voice calm despite the chaotic energy of the market (greet calm)"
1
"she acknowledged, lowering her hand from her holster (acknowledge, lower)"
2
"Tomás admitted (admit)"
88.7381%