Run: 2026-05-29-01KSSJH5RCBXAHYFEY9CK5ZV5R

Run Details

Duration:
40.8s
Cost:
$0.062800
Provider:
Anthropic

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

AI
The descent into the abandoned station felt like swallowing dust. Detective Harlow Quinn took the stairs two at a time, her boots ringing on iron treads that hadn't borne weight in fifty years, and tried to ignore the way the temperature dropped with every step. The Camden street above had been a sweating July night, all kebab grease and night-bus diesel. Down here it was cold enough to see her breath. "Mind the gap, Detective," called Sergeant Pell from below, and laughed at his own joke. Nobody else did. Quinn reached the platform and stopped to take the measure of it, the way she always did, before she let anyone hand her a story. Eighteen years had taught her that a scene told the truth exactly once, in the first thirty seconds, before the boots and the cameras and the well-meaning theories trampled it into something convenient. She checked the worn leather watch on her left wrist out of habit — 2:14 — and let her eyes move. The platform had been sealed since the Blitz, according to the duty log. The tiling was the colour of old teeth, cracked in long veins. Floodlights on tripods threw everything into the hard white of a film set, and in the centre of that brightness lay the body. Male. Thirties, maybe. Lying on his back with his arms loose at his sides, one knee drawn up, as if he'd lain down for a rest and simply not got up. No blood. That was the first wrong thing. Quinn had seen a great many dead men, and the ones who died violently rarely arranged themselves so tidily. "Walk me through it," she said. Pell came up beside her, thumbing through his notebook. He was good enough, Pell, in the way of a man who trusted the first answer that fit. "Vagrant, we reckon. Found by an urban-explorer type around midnight — kids breaking in to take photos for the internet. No ID on him. No sign of forced anything, because there's nothing down here to force. Coroner's preliminary says cardiac event. Cold down here, poor sod's heart gives out, that's the long and short of it." "Heart attack." "Heart attack." Pell sounded relieved to have a word for it. "Tragic, but it's not a murder, Detective. We'll log it and let the coroner sign off." Quinn crouched. Her knees protested; forty-one was no longer young in a job that lived on its feet. She did not touch the body. She looked. The man was dressed wrong for a vagrant. Not the clothes themselves — those were ordinary, jeans and a grey jacket — but the wear pattern. The soles of his trainers were barely scuffed. The cuffs of his jeans were clean. A man who slept rough left his life written on his shoes, and this man's shoes said he had walked, at most, from a car to a door and down a flight of stairs. "He didn't live here," she said. "Lots of them move around—" "His shoes are clean, Sergeant. There's no dust on his back." She gestured, careful, an inch above the corpse. "Look at the floor." Pell looked. A film of grey dust coated the platform, undisturbed except where the boots of the responding officers had churned it into a confusion of prints. But beneath the body — and this was the thing that had snagged in Quinn's mind the moment the floodlights caught it — beneath the body the dust was clean. Not smeared, as it would be if he'd fallen and the impact had pushed it aside. Clean, in a perfect halo, as though the dust had been swept back from him in every direction at once. "Draught," Pell offered. "There's no draught. Strike a match if you don't believe me; the flame won't move." She stood, slowly. "Something happened here that put him on the floor and pushed the dust out. He didn't lie down. He arrived." Pell's mouth thinned. He didn't like the word arrived, and Quinn didn't blame him. She didn't like it either. It was the kind of word that had eaten DS Morris three years ago, the kind that started in the gut and ended with a case file marked unexplained and a chair at the station that nobody would sit in. She made herself look closer. The man's right hand was half-curled, and in the curl of it, almost hidden, was a small dark object. Quinn pulled a glove from her pocket — the latex snapping in the cold — and eased the fingers open with the patience of someone defusing something. A token. Carved from bone, yellowed and smooth with handling, the size of a poker chip. A spiral cut into one face, and on the other, a single character she didn't recognise — older than any alphabet she'd been taught. It was warm. That was the third wrong thing, and the one that made the hair rise along her arms. Everything down here was cold, and the bone token in a dead man's hand was warm as a held breath. "Evidence bag," she said. "Detective—" "Now, Sergeant." She turned the token in the light while Pell rummaged. The spiral wasn't decoration; it was worn deepest at the centre, the way a doorknob wears, the way a thing wears when it's used. A key, then. A token used to enter somewhere. And the markings on the spiral side caught the floodlight and seemed, for half a heartbeat, to move — a crawl of shadow across bone that had no business moving in steady light. Quinn had seen markings like that exactly once before, in a photograph clipped to Morris's last notebook, in the days before he walked into a building in Whitechapel and never walked out. She had stared at that photograph for three years and told herself it meant nothing. She thought, suddenly and clearly, of a name. Eva Kowalski. The young woman with the round glasses and the satchel of books who worked the restricted archives at the Museum, the one who'd cornered her at a coroner's inquest last spring and said, *you keep finding things that don't have explanations, Detective. I have explanations. They're just not the kind you want.* Quinn had taken her card and thrown it in a drawer. "It's a heart attack," Pell said again, more quietly now, watching her face. "No." Quinn slid the token into the bag and sealed it, and through the plastic she could still feel the faint, impossible warmth of it against her palm. "It's a door. And someone walked through it and left him behind." She looked down the black throat of the tunnel, where the floodlights gave up and the dark began, and for the first time in three years she let herself believe the dark might be looking back.
created_at"2026-05-29T09:55:00.502Z" 5/29/2026, 9:55:00 AM
model"anthropic/claude-4.8-opus-20260528"
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external_user(null)
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cancelledfalse
latency3740
moderation_latency(null)
generation_time40813
tokens_prompt923
tokens_completion1714
native_tokens_prompt1285
native_tokens_completion2255
native_tokens_completion_images(null)
native_tokens_reasoning89
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"end_turn"
service_tier"default"
usage0.0628
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provider_responses
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is_byokfalse
latency1110
model_permaslug"anthropic/claude-4.8-opus-20260528"
provider_name"Anthropic"
status200
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request_id"req-1780048500-vxCD96JsCpuU2a8tgRq6"
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Evaluation details

Result Evaluator Details Meta Data
0.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags10
adverbTagCount2
adverbTags
0"She stood slowly [slowly]"
1"Pell said again [again]"
dialogueSentences19
tagDensity0.526
leniency1
rawRatio0.2
effectiveRatio0.2
91.17% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1132
totalAiIsmAdverbs2
found
0
adverb"slowly"
count1
1
adverb"suddenly"
count1
highlights
0"slowly"
1"suddenly"
100.00% AI-ism character names
Target: 0 AI-default names (17 tracked, −20% each)
codexExemptions(empty)
found(empty)
100.00% AI-ism location names
Target: 0 AI-default location names (33 tracked, −20% each)
codexExemptions(empty)
found(empty)
82.33% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1132
totalAiIsms4
found
0
word"weight"
count1
1
word"churned"
count1
2
word"perfect"
count1
3
word"warmth"
count1
highlights
0"weight"
1"churned"
2"perfect"
3"warmth"
100.00% Cliché density
Target: ≤1 cliche(s) per 800-word window
totalCliches0
maxInWindow0
found(empty)
highlights(empty)
100.00% Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells0
narrationSentences69
matches(empty)
80.75% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount2
hedgeCount1
narrationSentences69
filterMatches
0"watch"
1"look"
hedgeMatches
0"tried to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences78
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen56
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans1
markdownWords19
totalWords1143
ratio0.017
matches
0"you keep finding things that don't have explanations, Detective. I have explanations. They're just not the kind you want."
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions10
unquotedAttributions0
matches(empty)
98.82% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions31
wordCount977
uniqueNames12
maxNameDensity1.02
worstName"Quinn"
maxWindowNameDensity2
worstWindowName"Pell"
discoveredNames
Harlow1
Quinn10
Camden1
July1
Sergeant1
Pell9
Blitz1
Morris2
Whitechapel1
Kowalski1
Museum1
Detective2
persons
0"Harlow"
1"Quinn"
2"Sergeant"
3"Pell"
4"Blitz"
5"Morris"
6"Kowalski"
places
0"Camden"
1"Whitechapel"
2"Museum"
globalScore0.988
windowScore1
98.98% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences49
glossingSentenceCount1
matches
0"felt like swallowing dust"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1143
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences78
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs30
mean38.1
std29.89
cv0.784
sampleLengths
071
118
279
348
458
56
683
72
827
926
1075
116
125
1323
1493
153
1638
1759
185
1946
2080
214
221
232
2476
2547
2673
2713
2840
2936
84.92% Passive voice overuse
Target: ≤2% passive sentences
passiveCount4
totalSentences69
matches
0"been sealed"
1"was dressed"
2"been swept"
3"been taught"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount0
totalVerbs154
matches(empty)
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount10
semicolonCount3
flaggedSentences9
totalSentences78
ratio0.115
matches
0"She checked the worn leather watch on her left wrist out of habit — 2:14 — and let her eyes move."
1"Her knees protested; forty-one was no longer young in a job that lived on its feet."
2"Not the clothes themselves — those were ordinary, jeans and a grey jacket — but the wear pattern."
3"But beneath the body — and this was the thing that had snagged in Quinn's mind the moment the floodlights caught it — beneath the body the dust was clean."
4"\"There's no draught. Strike a match if you don't believe me; the flame won't move.\" She stood, slowly."
5"Quinn pulled a glove from her pocket — the latex snapping in the cold — and eased the fingers open with the patience of someone defusing something."
6"A spiral cut into one face, and on the other, a single character she didn't recognise — older than any alphabet she'd been taught."
7"The spiral wasn't decoration; it was worn deepest at the centre, the way a doorknob wears, the way a thing wears when it's used."
8"And the markings on the spiral side caught the floodlight and seemed, for half a heartbeat, to move — a crawl of shadow across bone that had no business moving in steady light."
94.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount971
adjectiveStacks1
stackExamples
0"great many dead men,"
adverbCount34
adverbRatio0.035015447991761074
lyAdverbCount12
lyAdverbRatio0.012358393408856848
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences78
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences78
mean14.65
std11.66
cv0.796
sampleLengths
010
135
216
310
415
53
625
733
821
913
1012
1123
121
132
1428
152
166
1719
186
199
2018
2156
222
2311
2416
252
2616
276
282
298
3018
318
327
3334
346
355
3619
374
382
3925
4030
4116
4220
433
4418
4520
463
4711
485
4940
77.78% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats6
diversityRatio0.5128205128205128
totalSentences78
uniqueOpeners40
0.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount0
totalSentences57
matches(empty)
ratio0
100.00% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount17
totalSentences57
matches
0"She checked the worn leather"
1"He was good enough, Pell,"
2"Her knees protested; forty-one was"
3"She did not touch the"
4"She gestured, careful, an inch"
5"She stood, slowly"
6"He didn't like the word"
7"She didn't like it either."
8"It was the kind of"
9"She made herself look closer."
10"It was warm."
11"She turned the token in"
12"She had stared at that"
13"She thought, suddenly and clearly,"
14"I have explanations."
15"They're just not the kind"
16"She looked down the black"
ratio0.298
47.72% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount47
totalSentences57
matches
0"The descent into the abandoned"
1"Detective Harlow Quinn took the"
2"The Camden street above had"
3"Nobody else did."
4"Quinn reached the platform and"
5"She checked the worn leather"
6"The platform had been sealed"
7"The tiling was the colour"
8"Floodlights on tripods threw everything"
9"That was the first wrong"
10"Quinn had seen a great"
11"Pell came up beside her,"
12"He was good enough, Pell,"
13"Pell sounded relieved to have"
14"Her knees protested; forty-one was"
15"She did not touch the"
16"The man was dressed wrong"
17"The soles of his trainers"
18"The cuffs of his jeans"
19"A man who slept rough"
ratio0.825
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences57
matches(empty)
ratio0
63.49% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences36
technicalSentenceCount4
matches
0"Detective Harlow Quinn took the stairs two at a time, her boots ringing on iron treads that hadn't borne weight in fifty years, and tried to ignore the way the …"
1"Quinn had seen a great many dead men, and the ones who died violently rarely arranged themselves so tidily."
2"Her knees protested; forty-one was no longer young in a job that lived on its feet."
3"The young woman with the round glasses and the satchel of books who worked the restricted archives at the Museum, the one who'd cornered her at a coroner's inqu…"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags10
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags5
fancyCount0
fancyTags(empty)
dialogueSentences19
tagDensity0.263
leniency0.526
rawRatio0
effectiveRatio0
80.6653%