NC Bench
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Run: 2026-02-17-01KHMMEC95PJ2QJ5Z0NDG2KBGD
Run Details
Model:
Cohere Command R+ (Aug. 2024)
Test:
Bad Writing Habits
Scenario:
Thriller: chase through city streets
Duration:
59.5s
Cost:
$0.025808
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
Detective Harlow Quinn stood beneath the flickering streetlamp, the rain
cascading
off her
tightly
braided hair, each droplet
glinting
like a pearl under the warm glow. The downpour had transformed the city into a shimmering, dreamlike landscape, the kind she'd
see
n in paintings but rarely experienced in the dry realities of her e
very
day life. Tonight, the world had decided to paint itself in shades of silver and shadow, the puddles on the pavement mirroring the clouds above. Her focus, however, was not on the artistic beauty of the scene but on the figure ahead, a silhouette darting between the pools of light and darkness. The man they called Silas
was leading
her on a wild chase through the heart of Soho, and she
was determined
to end it. Silas had been a person of interest for a long time, a whisper in the shadows of the city's underbelly. His association with the mysterious group known as the Clique had raised more than a few red flags, especially considering their possible connection to the disappearance of her partner three years ago. Quinn knew in her gut that this case was the key to unlocking the truth behind DS Morris' vanishing. Now that Silas was in her sights, she wasn't about to let him slip away. Quinn's sturdy black boots splashed through the reflections as she pursued him with a determination honed from years of chasing suspects through these
very
streets. The rain didn't deter her; it merely added another layer to the maze, a watery curtain obscuring her prey's movements. Turning a corner, she cursed under her breath as the figure ducked into an alleyway she knew all too well. The entrance to the Raven's Nest, a
see
dy bar that offered more than just drinks,
was marked
by a distinctive green neon sign, its glow now distorted by the rainwater. "At least he's predictable," she muttered, her hands instinctively adjusting her belt, checking her holster. The Nest buzzed with activity despite the late hour, hinting at illicit dealings within. She pushed her way through the heavy wooden door, the bell above clanging like a warning to the patrons. All conversation halted as heads turned, the music
see
ming to shudder to a stop. She scanned the room, her eyes flicking over the faces of hardened criminals, informants, and neutral bystanders. No sign of Silas. He must have made his way deeper into the establishment. But as she stepped further into the dimly lit bar, an unsettling feeling crept up her spine, causing e
very
nerve ending to tingle. It was the look in the eyes of the patrons—a mixture of fear and respect. They knew who she was, a detective from the Metropolitan Police, but something else was there, something these hardened souls had never encountered before. Was it the gravity of her case, the memory of her lost partner, or something else entirely? She drew near the bar, and the patrons parted before her like a tide receding from the shore. The bartender, an old hand named Gus, wiped his hands on a grimy towel, his eyes never leaving Quinn. "Evening, Detective," he rasped, his deep voice carrying a heavy rasp like a saw through bone. "You know why I'm here," Quinn replied, her eyes
unwavering
. Wild Bill, a weaselly informant with a penchant for smelling like wet dog, shuffled closer, his face a mix of fear and excitement. "He went downstairs, Detective," he whispered, his breath rancid with cheap liquor. "Into the back room. But he ain't come out yet, and believe me, I'd hear him." Quinn nodded, her eyes flicking to the worn wooden stairwell that led to the basement. The back room
was known
as a place for
clandestine
meetings of the city's underground, and Silas had been more than eager to make his way down. She
was convinced
the answers she sought were just a few steps away. But this wasn't a normal chase. Quinn couldn’t shake the dread that had been building within her since she first picked up Silas' trail. It felt like something far more ancient and dangerous than any criminal she'd confronted before. The creak of a floorboard sounded above her, and Quinn's head snapped up, her hand hovering above her holster. But it was not Silas that emerged from the gloom; instead, a figure stepped into the light, his presence causing the patrons to flinch back as though they'd
been burned
. "Tomás Herrera," Quinn whispered, her voice low and uncertain. The former paramedic who'd disappeared off the grid months ago after losing his license due to his involvement with the Clique stared back at her, the Saint Christopher medallion
glinting
around his neck. His eyes were hard, yet there was a glimmer of something like recognition, perhaps even pity, when he looked at her. "What's going on here, Tomás?" Quinn asked, her voice steady despite the storm within her. "Why are you here?" Tomás' lips pressed together, and he glanced about the room, his eyes taking in the fear and reverence in the gazes of those around them. "Not here. Not safe." Quinn's
eyes narrowed
. "Then where?" He stepped closer, his voice dropping to a whisper that only she could hear. "There's something you need to
see
, Detective. Something that'll change e
very
thing. Meet me at the old Camden station in an hour." Quinn's sharp eyes fixed on Tomás' face, searching for any signs of deception, but all she found was sincerity in the depths of his warm brown eyes. The mention of Camden
resonated
, a puzzle piece slotting into place. The Veil Market—that hidden supernatural black market that traded goods, substances, and information at the price of a bone token under the light of a full moon—
was scheduled
to set up shop in the abandoned underground tunnels tonight. She nodded once, and with a final glance at the patrons of the Raven's Nest, she strode purposefully through the crowd, her boots
echoing
against the floorboards as she made her way out. She'd
been warned
about the Veil Market, its dealings in the darkness beyond the understanding of mortal men, but she knew she had to take this chance. An hour later, Quinn descended into the darkness of the abandoned Camden station, her breath forming clouds in the cold air. The old platforms lay silent, the tracks
gleaming
in the light of her torch. She was alone, save for the distant scurrying of rats and the eerie
echoes
of her
footsteps
reverberating through the tunnels. "You ready for this?" The sound of Tomás' voice startled her, but she didn't let it show. He emerged from the darkness, his face illuminated by the soft glow of a candle in a jar he held. His clothes were grimy, bearing the marks of his
newfound
life off the grid. "What is this place, Tomás?" she asked, her eyes sweeping the tunnels, imagining the spirits of departed commuters watching from the shadows. "It's a crossroads, Detective," he replied, his voice
echoing
in the vast emptiness. "A place where the laws of nature get a little bent. People come here for all sorts of things." "And you?" He smiled, a bittersweet twist of his lips. "I'm here to help those the system ignores." "You lost your license because of the Clique, didn't you? Took a risk, and it backfired." Quinn wanted to push him,
see
if he'd crack, spill the secrets she needed. Tomás' eyes flashed with a mixture of anger and regret. "I did what I thought was right, and I'd do it again. There are things happening in this city—and beyond—that threaten the
very
fabric of our existence. People need protection from them." "Like your Saint Christopher medallion?" Quinn nodded towards the shining pendant. Tomás' fingers curled protectively around the medallion. "It's more than just a piece of jewelry, Detective. It's a shield, a reminder of protection and faith." She paused,
see
ing a glimpse of a story there, one that might lead her to her partner. "I need you to tell me about the Clique, Tomás. What do you know about them?" A pained expression crossed his face. "I thought I knew a lot, but I've realized how little I understand since I started coming here." He gestured around them, the candlelight
dancing
eerily. "They're a part of something older and more powerful than I could've imagined. Silas is only a small cog in their machine." "I need to understand," Quinn urged, taking a step closer, her breath misting in the cold. "Why are they so hard to pin down?" "Because they're not just criminals, Detective," he replied, his voice low and urgent. "They're a part of an ancient network, an underground river that flows beneath our city, and Silas is..." He trailed off, his eyes distant. "Silas is what?" Quinn pressed, her voice urgent in the
echoing
chamber. Tomás shook his head. "I can't tell you e
very
thing I've
see
n or heard. Not yet. But I can show you something that might help you." Tomás led her deeper into the station's guts, down passages and through rooms, each more decrepit than the last. The air grew colder, carrying the dampness of the Thames and the scent of old mortar and decaying concrete. Amidst the eerie silence, the city above
see
med like a distant memory. They stopped before a large iron door, its surface scarred and pitted from years of neglect. Tomás produced a bone token from his pocket, its
intricate
carvings
gleaming
in the candlelight. He slotted it into the lock with a sense of reverence, and the door swung open with a protesting creak, revealing a lit space beyond. As they stepped through, the hairs on Quinn's arms stood on end. The space was vast, its walls disappearing into the shadows, lined with tables and stalls selling items she could barely comprehend. Candles and lanterns illuminated the mysterious wares—fossilized bones of forgotten creatures, vials of substances that
shimmered
in e
very
color of the rainbow, and tomes bound in leather so ancient, they looked petrified. "Welcome to the Veil Market," Tomás said
softly
, leading her through the maze of stalls. Vendors whispered their wares and advice, their dark eyes
glinting
under wide-brimmed hats. "Rat's foot and wolfsbane for protection," one whispered. "Moonlit charms and fish scales for love." Quinn's
heart hammered in her chest
as she traced her fingers over an ancient map, its corners curling with age. "How does any of this relate to my partner's disappearance?" Tomás drew her to a stall where an old woman sat smoking a pipe, tendrils of sweet incense mingling with the damp air. "They deal in many things, Detective. Even the souls of men." The chase had led her here, to the labyrinthine heart of London's supernatural underground. Now, she was more determined than ever to uncover the truth, even if it meant facing the darkness head-on.
created_at
"2026-02-17T01:47:39.381858+00:00"
2/17/2026, 1:47:39 AM
model
"cohere/command-r-plus-08-2024"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
212
moderation_latency
143
generation_time
59239
tokens_prompt
914
tokens_completion
2734
native_tokens_prompt
831
native_tokens_completion
2373
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
0.0258075
router
(null)
provider_responses
0
id
"b8c10da6-fb51-45c2-9e8f-7a0fabab11c0"
status
200
is_byok
false
latency
212
endpoint_id
"cd63714a-d459-4806-bdf2-0dfea4f6614c"
provider_name
"Cohere"
model_permaslug
"cohere/command-r-plus-08-2024"
api_type
"completions"
id
"gen-1771292799-bvjZDvwWocnmW5LihQCT"
upstream_id
"b8c10da6-fb51-45c2-9e8f-7a0fabab11c0"
total_cost
0.0258075
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Cohere"
Evaluation details
Result
Evaluator
Details
Meta Data
82.0513%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
13
adverbTagCount
2
adverbTags
0
"she muttered, her hands instinctively adjusting her belt, checking her holster [instinctively]"
1
"Tomás said softly, leading her through the maze of stalls [softly]"
77.9736%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1816
totalAiIsmAdverbs
4
found
0
adverb
"softly"
count
1
1
adverb
"tightly"
count
1
2
adverb
"very"
count
2
highlights
0
"softly"
1
"tightly"
2
"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)
0.0000%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1816
totalAiIsms
19
found
0
word
"resonated"
count
1
1
word
"shimmered"
count
1
2
word
"gleaming"
count
2
3
word
"glinting"
count
3
4
word
"cascading"
count
1
5
word
"clandestine"
count
1
6
word
"unwavering"
count
1
7
word
"intricate"
count
1
8
word
"newfound"
count
1
9
word
"dancing"
count
1
10
word
"footsteps"
count
1
11
word
"amidst"
count
1
12
word
"echoes"
count
1
13
word
"echoing"
count
3
highlights
0
"resonated"
1
"shimmered"
2
"gleaming"
3
"glinting"
4
"cascading"
5
"clandestine"
6
"unwavering"
7
"intricate"
8
"newfound"
9
"dancing"
10
"footsteps"
11
"amidst"
12
"echoes"
13
"echoing"
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 hammered in her chest"
1
"eyes narrowed"
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
0
narrationSentences
87
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
1
hedgeCount
0
narrationSentences
87
filterMatches
0
"see"
hedgeMatches
(empty)
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
0
totalSentences
105
matches
(empty)
100.0000%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
46
mean
39.3
std
20.63
cv
0.525
sampleLengths
0
77
1
51
2
86
3
45
4
50
5
15
6
47
7
31
8
79
9
53
10
61
11
55
12
39
13
49
14
63
15
19
16
29
17
5
18
35
19
76
20
60
21
56
22
4
23
47
24
22
25
32
26
2
27
16
28
30
29
42
30
11
31
25
32
33
33
54
34
24
35
37
36
12
37
25
38
50
39
56
40
65
41
15
42
28
43
30
44
34
45
33
79.6935%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
7
totalSentences
87
matches
0
"was determined"
1
"was marked"
2
"was known"
3
"was convinced"
4
"been burned"
5
"was scheduled"
6
"been warned"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
1
totalVerbs
225
matches
0
"was leading"
94.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
1477
adjectiveStacks
1
stackExamples
0
"under wide-brimmed hats."
adverbCount
43
adverbRatio
0.02911306702775897
lyAdverbCount
15
lyAdverbRatio
0.010155721056194989
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
105
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
105
mean
17.22
std
7.82
cv
0.454
sampleLengths
0
26
1
28
2
23
3
27
4
24
5
20
6
32
7
19
8
15
9
25
10
20
11
20
12
30
13
15
14
14
15
19
16
14
17
17
18
4
19
10
20
23
21
15
22
24
23
17
24
18
25
19
26
16
27
10
28
23
29
12
30
16
31
15
32
27
33
13
34
6
35
18
36
15
37
19
38
30
39
9
40
33
41
21
42
15
43
4
44
25
45
4
46
3
47
2
48
14
49
21
64.7619%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
2
diversityRatio
0.4
totalSentences
105
uniqueOpeners
42
0.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
13
fancyCount
10
fancyTags
0
"she muttered, her hands instinctively adjusting her belt, checking her holster (mutter, instinctively adjust check)"
1
"he rasped, his deep voice carrying a heavy rasp like a saw through bone (rasp, carry like)"
2
"Quinn replied, her eyes unwavering (reply, unwaver)"
3
"he whispered, his breath rancid with cheap liquor (whisper)"
4
"Quinn whispered, her voice low and uncertain (whisper)"
5
"he replied, his voice echoing in the vast emptiness (reply, echo)"
6
"Quinn urged, taking a step closer, her breath misting in the cold (urge, take mist)"
7
"pressed (pressed)"
8
"Tomás said softly, leading her through the maze of stalls (say softly, lead)"
9
"one whispered (whisper)"
82.2635%