Run: 2026-06-01-01KT1H50QKD8B381CRMRHMS0WS

Run Details

Duration:
44.9s
Cost:
$0.061570
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="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

AI
Rain came down in sheets across Camden, turning the streetlights into smeared halos and the pavement into a black mirror that swallowed Detective Harlow Quinn's reflection as she ran. Eighteen years on the force had taught her how to read a runner's body before he committed to the bolt — the tightening of the shoulders, the half-glance back — and she'd read this one the instant he stepped out of the chemist's doorway and clocked her across the road. Tomás Herrera. She had his face memorized from three months of surveillance photos. The former paramedic, the one who patched up people who never appeared in any hospital record, who vanished from every camera the moment he crossed certain thresholds in this city. He ran now like a man who knew the streets better than she did, splashing through puddles, his jacket plastered dark to his back. "Herrera!" Her voice cut through the hiss of rain. "Police! Stop!" He didn't stop. They never did. She pumped her arms and closed the gap to thirty feet. Her boots found purchase where his slipped; military precision, even in a foot chase, even at forty-one with her lungs starting to burn. She'd buried that softness years ago, the same week she'd buried Morris — what little of him there'd been left to bury — and what remained was lean and relentless and patient. Herrera cut left down an alley between a shuttered record shop and a kebab house, the neon of the latter staining the wet bricks red. Quinn followed, vaulting a toppled bin without breaking stride. Halfway down he risked the glance back, and she saw his face properly for the first time tonight: olive skin slick with rain, dark curls flattened to his forehead, eyes wide not with fear of capture but with something more particular. Calculation. He was deciding something. Then he was gone. She skidded to a halt where the alley dead-ended at a brick wall topped with rusted railings. No door. No fire escape within reach. No Herrera. The rain drummed on the lid of the bins, ran in cold ribbons down the back of her collar. Quinn turned a slow circle, breath sawing, and her detective's mind catalogued the impossible: a man does not simply cease to exist in a closed alley. Except there — low against the base of the wall, where the brick should have been solid — a seam of light. Not the orange of sodium lamps. Something colder, bluish, leaking up from below like the glow of a sunken thing. She crouched. Her fingers found an iron grating, the kind that should have covered nothing but a forgotten Victorian drain. But the bars had been swung aside, recently, the hinges greased and silent, and beneath them a stairwell descended into the earth. The walls of it were tiled in the cream-and-maroon of an old Underground station. She knew her city's bones; there had been a Tube stop here once, closed before she was born, sealed and forgotten. It was not forgotten anymore. From below came sound. Not the rumble of trains — those tracks had been dead for decades — but voices, the murmur of a crowd, and under it a music that didn't sit right in her ears, all wrong intervals and a rhythm her pulse kept trying to match and failing. The light pulsed. The air drifting up smelled of incense and copper and something green and rotten, like crushed stems left too long in water. Every instinct she'd honed across eighteen years told her to call it in. Stand at the top of the hole, radio her position, wait for backup, secure the scene. That was procedure. That was what kept a detective alive long enough to collect a pension. But she thought of Morris. Three years gone, and the official file still read *missing, presumed.* She'd been ten feet from him in a basement in Whitechapel when the lights died, and when they came back he simply wasn't there. No blood. No body. No exit he could have taken. The brass had called it abduction by persons unknown and quietly let it go. Quinn had never let it go. She'd spent three years following threads that all frayed into the same impossible knot — people who weren't on any register, places that weren't on any map, a man like Herrera who could erase himself from a sealed alley. The clique she'd been building a case against weren't just criminals. They were something else, and Morris had stumbled into the edge of their world and been swallowed by it. The answer was down those stairs. She could feel it the way you feel a storm coming in your old fractures. Quinn drew her sidearm, kept it low along her thigh, and descended. The temperature dropped with each step. The tiled walls gave way to a platform that had no right to look the way it did — the rotted wooden benches had been pushed back, the platform edge strung with lanterns that burned without flame, and where the tracks should have lain in their trench, stalls had been raised. Canvas and salvaged timber, lit from within, each one a pool of that wrong cold light. Figures moved between them, hooded and unhooded, and Quinn's trained eye snagged on detail after detail her mind refused to file: a woman selling vials that shifted color as she breathed on them; a man with a tray of small white tokens carved from bone; jars on a shelf that turned to follow her as she passed, the things inside them blinking. She kept her weapon low and her face hard. The crowd parted around her, and she felt their attention crawl over her skin like the legs of insects. They knew she didn't belong. She wore it like a wound. A few hands drifted toward hidden weapons; a few mouths shaped words she didn't want translated. A bald man stepped into her path, broad as a door, one palm raised. "Token," he said, and his voice had gravel in it that no human throat produced. "No one enters the Market without a bone token, Detective." So they knew the word for what she was, too. Quinn didn't raise the gun. Not yet. She scanned the moving crowd over the man's shoulder, and there — at the far end of the platform, near a stall draped in black, glancing back at her with that same calculation — was Tomás Herrera. He saw her see him. For one strange moment something almost like an apology crossed his face. Then he slipped behind the black drape and was gone again. Quinn looked at the bald man, at the bone tokens she didn't have, at the impossible market full of impossible things, and at the dark gap where her only lead had vanished. Rain still dripped from her cropped hair onto the worn leather watch at her wrist, the only honest thing down here. "I'm not here to buy anything," she said quietly. "I'm here to find a man. And I'm going to find him whether you let me through or not." She stepped around the gatekeeper, and the Market closed around her like a fist.
created_at"2026-06-01T12:04:49.016Z" 6/1/2026, 12:04:49 PM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
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cancelledfalse
latency2957
moderation_latency(null)
generation_time44864
tokens_prompt914
tokens_completion1766
native_tokens_prompt1264
native_tokens_completion2210
native_tokens_completion_images(null)
native_tokens_reasoning40
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"
usage0.06157
router(null)
provider_responses
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endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
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is_byokfalse
latency1198
model_permaslug"anthropic/claude-4.8-opus-20260528"
provider_name"Anthropic"
status200
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request_id"req-1780315489-CitXwp8HcsDvnBjsmUmP"
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api_type"completions"
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Evaluation details

Result Evaluator Details Meta Data
0.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags2
adverbTagCount1
adverbTags
0"she said quietly [quietly]"
dialogueSentences6
tagDensity0.333
leniency0.667
rawRatio0.5
effectiveRatio0.333
100.00% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1195
totalAiIsmAdverbs0
found(empty)
highlights(empty)
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)
83.26% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1195
totalAiIsms4
found
0
word"pulse"
count1
1
word"pulsed"
count1
2
word"could feel"
count1
3
word"scanned"
count1
highlights
0"pulse"
1"pulsed"
2"could feel"
3"scanned"
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
emotionTells1
narrationSentences76
matches
0"t with fear"
86.47% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount3
hedgeCount0
narrationSentences76
filterMatches
0"feel"
1"see"
2"watch"
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences79
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen62
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans1
markdownWords2
totalWords1207
ratio0.002
matches
0"missing, presumed."
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions5
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions26
wordCount1168
uniqueNames12
maxNameDensity0.68
worstName"Quinn"
maxWindowNameDensity1.5
worstWindowName"Quinn"
discoveredNames
Camden1
Detective1
Harlow1
Quinn8
Herrera5
Morris3
Victorian1
Underground1
Tube1
Whitechapel1
Tomás2
Market1
persons
0"Harlow"
1"Quinn"
2"Herrera"
3"Morris"
4"Tomás"
5"Market"
places
0"Whitechapel"
globalScore1
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences54
glossingSentenceCount0
matches(empty)
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.829
wordCount1207
matches
0"not with fear of capture but with something more particular"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences79
matches
0"buried that softness"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs26
mean46.42
std36.82
cv0.793
sampleLengths
079
167
211
36
466
580
64
771
842
977
105
1176
1245
135
14134
1521
1612
17135
1855
1939
2010
2161
2211
2353
2428
2514
68.33% Passive voice overuse
Target: ≤2% passive sentences
passiveCount8
totalSentences76
matches
0"been left"
1"was gone"
2"been swung"
3"were tiled"
4"been ten"
5"been swallowed"
6"been pushed"
7"been raised"
8"was gone"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount1
totalVerbs199
matches
0"was deciding"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount12
semicolonCount5
flaggedSentences11
totalSentences79
ratio0.139
matches
0"Eighteen years on the force had taught her how to read a runner's body before he committed to the bolt — the tightening of the shoulders, the half-glance back — and she'd read this one the instant he stepped out of the chemist's doorway and clocked her across the road."
1"Her boots found purchase where his slipped; military precision, even in a foot chase, even at forty-one with her lungs starting to burn."
2"She'd buried that softness years ago, the same week she'd buried Morris — what little of him there'd been left to bury — and what remained was lean and relentless and patient."
3"Except there — low against the base of the wall, where the brick should have been solid — a seam of light."
4"She knew her city's bones; there had been a Tube stop here once, closed before she was born, sealed and forgotten."
5"Not the rumble of trains — those tracks had been dead for decades — but voices, the murmur of a crowd, and under it a music that didn't sit right in her ears, all wrong intervals and a rhythm her pulse kept trying to match and failing."
6"She'd spent three years following threads that all frayed into the same impossible knot — people who weren't on any register, places that weren't on any map, a man like Herrera who could erase himself from a sealed alley."
7"The tiled walls gave way to a platform that had no right to look the way it did — the rotted wooden benches had been pushed back, the platform edge strung with lanterns that burned without flame, and where the tracks should have lain in their trench, stalls had been raised."
8"Figures moved between them, hooded and unhooded, and Quinn's trained eye snagged on detail after detail her mind refused to file: a woman selling vials that shifted color as she breathed on them; a man with a tray of small white tokens carved from bone; jars on a shelf that turned to follow her as she passed, the things inside them blinking."
9"A few hands drifted toward hidden weapons; a few mouths shaped words she didn't want translated."
10"She scanned the moving crowd over the man's shoulder, and there — at the far end of the platform, near a stall draped in black, glancing back at her with that same calculation — was Tomás Herrera."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1161
adjectiveStacks0
stackExamples(empty)
adverbCount31
adverbRatio0.026701119724375538
lyAdverbCount8
lyAdverbRatio0.0068906115417743325
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences79
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences79
mean15.28
std13.03
cv0.853
sampleLengths
029
150
22
311
430
524
69
72
83
93
1011
1123
1232
1325
149
1541
161
174
184
1917
202
215
222
2319
2426
2522
266
2714
282
2918
3022
3114
3221
335
344
3547
363
3722
3813
3916
403
4113
425
4335
442
452
466
4714
486
4939
56.12% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats9
diversityRatio0.4050632911392405
totalSentences79
uniqueOpeners32
98.04% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount2
totalSentences68
matches
0"Then he was gone."
1"Then he slipped behind the"
ratio0.029
78.82% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount24
totalSentences68
matches
0"She had his face memorized"
1"He ran now like a"
2"Her voice cut through the"
3"He didn't stop."
4"They never did."
5"She pumped her arms and"
6"Her boots found purchase where"
7"She'd buried that softness years"
8"He was deciding something."
9"She skidded to a halt"
10"Her fingers found an iron"
11"She knew her city's bones;"
12"It was not forgotten anymore."
13"She'd spent three years following"
14"They were something else, and"
15"She could feel it the"
16"She kept her weapon low"
17"They knew she didn't belong."
18"She wore it like a"
19"he said, and his voice"
ratio0.353
85.00% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount51
totalSentences68
matches
0"Rain came down in sheets"
1"She had his face memorized"
2"The former paramedic, the one"
3"He ran now like a"
4"Her voice cut through the"
5"He didn't stop."
6"They never did."
7"She pumped her arms and"
8"Her boots found purchase where"
9"She'd buried that softness years"
10"Herrera cut left down an"
11"Quinn followed, vaulting a toppled"
12"Halfway down he risked the"
13"He was deciding something."
14"She skidded to a halt"
15"The rain drummed on the"
16"Quinn turned a slow circle,"
17"Something colder, bluish, leaking up"
18"Her fingers found an iron"
19"The walls of it were"
ratio0.75
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences68
matches(empty)
ratio0
29.22% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences44
technicalSentenceCount7
matches
0"Rain came down in sheets across Camden, turning the streetlights into smeared halos and the pavement into a black mirror that swallowed Detective Harlow Quinn's…"
1"The former paramedic, the one who patched up people who never appeared in any hospital record, who vanished from every camera the moment he crossed certain thre…"
2"He ran now like a man who knew the streets better than she did, splashing through puddles, his jacket plastered dark to his back."
3"Her fingers found an iron grating, the kind that should have covered nothing but a forgotten Victorian drain."
4"Not the rumble of trains — those tracks had been dead for decades — but voices, the murmur of a crowd, and under it a music that didn't sit right in her ears, a…"
5"She'd spent three years following threads that all frayed into the same impossible knot — people who weren't on any register, places that weren't on any map, a …"
6"Figures moved between them, hooded and unhooded, and Quinn's trained eye snagged on detail after detail her mind refused to file: a woman selling vials that shi…"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags2
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags2
fancyCount0
fancyTags(empty)
dialogueSentences6
tagDensity0.333
leniency0.667
rawRatio0
effectiveRatio0
82.8420%