NC Bench
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Run: 2026-02-17-01KHMMC98FHJE3K39227M92BKV
Run Details
Model:
Cohere Command R+ (Aug. 2024)
Test:
Bad Writing Habits
Scenario:
Mystery: examining a crime scene
Duration:
26.8s
Cost:
$0.013293
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="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
London's underground pulsed with secrets, some buried deep, others lurking just beneath the surface. It was in this labyrinth that Detective Harlow Quinn arrived at a peculiar crime scene, far removed from the neat, sterile confines of her usual investigations. The Veil Market, a haven for the supernatural and bizarre, had become the stage for a baffling new case. The abandoned Camden station
echoed
with the
footsteps
of Detective Quinn and her colleague, DS Alejandro Ramos. They descended into the subterranean depths, their torch beams slicing through the darkness, illuminating a realm hidden from the ordinary world. Cobwebbed passageways and rusted signs hinted at a transport network that once teemed with life, now silent and eerie. "Quite a trek down here, Harlow," Ramos commented, his deep voice resonating in the stillness. His hazel eyes scanned the surroundings, taking in the sight of abandoned ticket booths and dormant escalators. "Not your average investigation site." Quinn's sharp gaze didn't waver, her focus honed on the trail that led them here. "It never is," she replied, her tone crisp and businesslike. "But our victim had a bone token and a penchant for exploring places like this. And someone doesn't want us to find out why." A chill, distinct from the stale air of the Tube tunnels, snaked down her spine. Quinn attributed it to proximity to something
otherworldly
, or perhaps just the knowledge that she
was encroaching
on territory shunned by law enforcement. The station, with its decaying beauty, felt like it had secrets of its own to tell. Arriving at the crime scene, their
footsteps
crunched over the gravelly ground, their torch beams finding the shattered remains of a glass display case. A smattering of mystical artifacts and strange concoctions
were strewn
across the floor, no sign of any coherent pattern to the chaos. DS Ramos crouched down, his thick forearms resting on his knees, and examined the scene with an appraiser's eye. "Looks like someone went on a shopping spree, then smashed the place up for good measure." Harlow's gaze drifted to the jagged edges of the broken glass, her mind already ticking through the implications. "This wasn't random. See how the cracks radiate from a single point? A precise, controlled strike." She leaned in closer, careful not to disturb any potential evidence. "And these items weren't chosen at random, either." Taking a moment to scrutinize the remnants of the exhibit, she noticed a curiously empty space. "The signature item is missing—a Veil Compass, crafted by a Shade artisan." Ramos considered this new information. "Expensive stuff, then? Someone wanted their hands on these artifacts." "Perhaps. But if theft was the motive, it's a poor attempt. More like a targeted sabotage." A perplexed frown creased his forehead. "Who would go through this much trouble to disrupt a supernatural black market? Some rival group?" Quinn stood upright, her eyes distant as she weighed the evidence and her suspicions. "Or someone who knows more than we do." His
eyes widened
. "Are you saying our killer, if there is one, has the backing of something... supranormal?" "Not yet." Quinn shook her head, her expression grim. "But it's all interwoven: our victim, this place, and something powerful." She recalled the missing Aurora Price, whose connection to this magical underground market had led Quinn and DS Ramos down here. Price, an heiress with ties to pagan circles, had made an intriguing new friend in Eva Kowalski, a brilliant young occult researcher. Recalling Kowalski's nervous habit of tucking back her fiery curls, Quinn wondered if her friend was somehow entangled in this mess. Perhaps Aurora had acquired some knowledge or item she shouldn't have, and the market's denizens sought retribution. Quinn bent down to inspect the debris again, picking up a shattered piece of pottery labeled with ancient runes. She lifted it with care, turning it over in her gloved hands, before slipping it into an evidence bag with practiced efficiency. DS Ramos, watching her every movement with a curious gaze, said, "You know, there's a reason we have forensics to do this kind of thing. We're more note-takers and people-chasers." Harlow rose to her full height, regarding Ramos with a slight smile. "I know, but I like to form my own opinions of the scene." She gestured to the surrounding chaos. "This is more than a simple robbery." Ramos's
eyes narrowed
, studying the scene with
newfound
skepticism. "You're thinking this points to Aurora Price's disappearance? Given her taboo tendencies, one could easily believe she pissed off the wrong magickal mafia." Nodding, Quinn replied, "Except anyone angry enough to exact revenge on the Veil Market wouldn't stop there. They'd want to erase all connections. Their modus operandi wouldn't be this haphazard." "So, you think someone wants Aurora to take the fall for this mess?" Harlow considered Ramos's observation. "I think someone wants us to believe there is no one else involved. That this was an isolated incident perpetrated by a single person—who's disappeared without a trace."
created_at
"2026-02-17T01:45:57.625277+00:00"
2/17/2026, 1:45:57 AM
model
"cohere/command-r-plus-08-2024"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
236
moderation_latency
183
generation_time
26166
tokens_prompt
923
tokens_completion
1324
native_tokens_prompt
857
native_tokens_completion
1115
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
0.0132925
router
(null)
provider_responses
0
id
"a9729bc4-44f5-4a64-aafc-1cdd395831e9"
status
200
is_byok
false
latency
236
endpoint_id
"cd63714a-d459-4806-bdf2-0dfea4f6614c"
provider_name
"Cohere"
model_permaslug
"cohere/command-r-plus-08-2024"
api_type
"completions"
id
"gen-1771292730-bzfxBgeLEcmCGDoKVleO"
upstream_id
"a9729bc4-44f5-4a64-aafc-1cdd395831e9"
total_cost
0.0132925
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
4
adverbTagCount
0
adverbTags
(empty)
100.0000%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
832
totalAiIsmAdverbs
0
found
(empty)
highlights
(empty)
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)
39.9038%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
832
totalAiIsms
5
found
0
word
"otherworldly"
count
1
1
word
"newfound"
count
1
2
word
"footsteps"
count
2
3
word
"echoed"
count
1
highlights
0
"otherworldly"
1
"newfound"
2
"footsteps"
3
"echoed"
66.6667%
Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches
2
maxInWindow
2
found
0
label
"eyes widened/narrowed"
count
2
highlights
0
"eyes widened"
1
"eyes narrowed"
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
0
narrationSentences
36
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
0
hedgeCount
0
narrationSentences
36
filterMatches
(empty)
hedgeMatches
(empty)
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
0
totalSentences
51
matches
(empty)
69.1739%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
24
mean
34.5
std
13.53
cv
0.392
sampleLengths
0
59
1
57
2
37
3
49
4
54
5
46
6
35
7
53
8
28
9
15
10
16
11
22
12
22
13
18
14
20
15
43
16
38
17
41
18
30
19
38
20
32
21
30
22
13
23
32
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
1
totalSentences
36
matches
0
"were strewn"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
1
totalVerbs
83
matches
0
"was encroaching"
100.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
530
adjectiveStacks
0
stackExamples
(empty)
adverbCount
13
adverbRatio
0.024528301886792454
lyAdverbCount
3
lyAdverbRatio
0.005660377358490566
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
51
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
51
mean
16.24
std
6.76
cv
0.416
sampleLengths
0
14
1
26
2
19
3
17
4
21
5
19
6
15
7
17
8
5
9
15
10
10
11
24
12
15
13
23
14
16
15
24
16
22
17
19
18
16
19
18
20
27
21
8
22
16
23
12
24
5
25
10
26
16
27
6
28
16
29
14
30
8
31
3
32
15
33
9
34
11
35
21
36
22
37
21
38
17
39
19
40
22
41
30
42
12
43
19
44
7
45
9
46
23
47
30
48
13
49
4
98.0392%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
1
diversityRatio
0.6078431372549019
totalSentences
51
uniqueOpeners
31
0.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
4
fancyCount
3
fancyTags
0
"Ramos commented, his deep voice resonating in the stillness (comment, resonate)"
1
"DS Ramos, watching her every movement with a curious gaze, said, (watch say)"
2
"Nodding, Quinn replied, (nod, reply,)"
86.6932%