Run: 2026-05-31-01KSYX8JFR9TPWPMGSE6JAS0A5

Run Details

Duration:
42.5s
Cost:
$0.063595
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
The rain came down in sheets, turning the Camden pavement into a black mirror that fractured under Quinn's boots. She ran low and hard, the way Morris had taught her years ago, weight forward, eyes fixed on the bobbing shape thirty yards ahead. The man in the dark jacket cut left around a shuttered kebab shop, and the green wash of a traffic light slid across his face for half a second—olive skin, a flash of something silver swinging at his throat. Tomás Herrera. She'd know that face anywhere now. Three weeks of surveillance photographs had burned it into her memory. "Police! Stop where you are!" Her voice tore through the downpour and died. He didn't even glance back. Eighteen years on the force and she had never once lost a foot pursuit. She wasn't about to start tonight, not with the only solid thread she had between the bodies in the morgue and that bar in Soho with its smug green sign. Herrera was the loose stitch. Pull him, and the whole rotten garment of Silas Vane's little clique came apart. He vaulted a low railing into the mouth of the old Tube station, the one that had been bricked over and forgotten since before she joined up. Quinn's lungs burned. She hit the railing, swung herself over, and her worn leather watch caught the iron with a crack of pain up her wrist. She ignored it. Pain was just information. The station entrance shouldn't have been open. That was the first wrong thing. The corrugated hoarding the council had bolted across it stood peeled back like the lid of a tin, and beyond it a stairwell descended into a darkness that didn't smell like a Tube station should. Not the usual reek of dust and rust and rat. Something older. Tallow smoke. Iron filings. A sweetness underneath that made the hair on her arms lift. She slowed at the threshold, chest heaving, water streaming off the close crop of her salt-and-pepper hair. Every instinct she'd built across two decades told her to call it in. To stand at the top of these stairs with her radio and her warrant card and wait for backup, for lights, for procedure. You did not follow a suspect alone into a hole in the ground in the dead of night. That was how good coppers died. That was how Morris died. The thought arrived unbidden, the way it always did. Three years and she still didn't have a single clean answer for what happened in that warehouse. Just a closed casket, a folded flag, and the words *unexplained circumstances* stamped across a file that nobody in the department would meet her eyes about. She'd promised herself, standing at that graveside in the rain, that she would never again be the one left standing at the threshold while the answers ran down into the dark. From below came the murmur of voices. Many voices. A market hum that had no business existing beneath a derelict station. Quinn drew her sidearm, checked the load by feel, and went down. The stairwell turned twice, and with each turn the light changed. The fluorescent buzz of the street gave way to something warmer and stranger—lanterns, she realized, actual flame in glass, throwing amber light across walls that should have been bare concrete but instead were hung with woven cloth and pinned with what looked like dried plants and the small white shapes of bones. At the bottom, where a Tube platform should have stretched, the space opened into something vast and impossible, a cavern of stalls and canvas and shifting bodies that ran far longer than the station's footprint had any right to. She stopped on the last step. Her cop's brain tried to catalogue what she was seeing and kept stalling, like a key that wouldn't turn. A woman at the nearest stall was selling vials that glowed faintly blue, the liquid inside moving against the tilt of the glass instead of with it. Beyond her, a hunched figure in a leather apron weighed something on a brass scale—teeth, Quinn thought, and refused to think it again. The crowd parted and reformed, dozens of them, hooded and cloaked and ordinary-looking and very much not ordinary at all. The air tasted of copper and smoke and that same impossible sweetness. And nobody was paying her any attention. Nobody except the broad-shouldered man at the entry post, who looked up from his ledger and held out one flat palm. "Token," he said. "Metropolitan Police." Quinn raised her warrant card on reflex, the laminated rectangle absurd in her hand. "I'm pursuing a suspect. Male, late twenties, dark jacket, came through here not thirty seconds ago." The man looked at the card, then at her, and something in his expression curdled from boredom into a cold, narrow attention that made her grip tighten on the gun she hadn't yet raised. "No token," he said, "no entry. And no badge means anything down here, Detective. You're a long way out of your jurisdiction." His gaze flicked deliberately past her, to the stairwell at her back, and the threat in it needed no words. That was when she saw Herrera again. He'd stopped maybe forty feet in, half-turned, watching her over the heads of the crowd. The Saint Christopher medallion caught a lantern's glow against his chest. And his face—that was the thing that snagged her, that stayed with her afterward. She'd expected the wide-eyed fear of a cornered runner. Instead he looked at her with something almost like pity. As though she were the one who'd wandered somewhere she didn't understand. As though he wanted to warn her. He lifted one hand—not in surrender, but in a small, urgent gesture. *Go back.* Then the crowd folded around him and he was gone, swallowed into the smoke and the lanternlight and the murmur of a thousand transactions she had no name for. Quinn stood frozen on the bottom step, rain still dripping from her jaw, the gatekeeper's stare pressing against her like a hand on her sternum. Every rule she'd ever sworn to said turn around. Climb the stairs. Radio it in. Bring daylight and warrants and the whole weight of the law down on this place. But she thought of Morris. She thought of the closed casket and the file nobody would explain and the three years of *unexplained circumstances* gnawing a hole in her chest. The answer to all of it was down here. She was certain of it now, certain the way she hadn't been certain of anything in years. She slid the warrant card back into her pocket. She did not lower the gun. "I don't have a token," she said quietly, and took the last step down onto the platform. "But I'm not going back up those stairs without him." The gatekeeper smiled. It was not a reassuring thing to see. "Then welcome to the Veil Market, Detective," he said. "Try to remember the way out." The crowd opened before her like water, and Harlow Quinn walked into the dark after the man who'd told her to run.
created_at"2026-05-31T11:38:45.125Z" 5/31/2026, 11:38:45 AM
model"anthropic/claude-4.8-opus-20260528"
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external_user(null)
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cancelledfalse
latency2813
moderation_latency(null)
generation_time42493
tokens_prompt914
tokens_completion1783
native_tokens_prompt1264
native_tokens_completion2291
native_tokens_completion_images(null)
native_tokens_reasoning46
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
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origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
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service_tier"default"
usage0.063595
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provider_responses
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is_byokfalse
latency1242
model_permaslug"anthropic/claude-4.8-opus-20260528"
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status200
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Evaluation details

Result Evaluator Details Meta Data
33.33% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags6
adverbTagCount1
adverbTags
0"she said quietly [quietly]"
dialogueSentences9
tagDensity0.667
leniency1
rawRatio0.167
effectiveRatio0.167
91.65% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1197
totalAiIsmAdverbs2
found
0
adverb"very"
count1
1
adverb"deliberately"
count1
highlights
0"very"
1"deliberately"
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)
79.11% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1197
totalAiIsms5
found
0
word"fractured"
count1
1
word"weight"
count2
2
word"streaming"
count1
3
word"flicked"
count1
highlights
0"fractured"
1"weight"
2"streaming"
3"flicked"
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
narrationSentences81
matches(empty)
89.95% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount1
hedgeCount2
narrationSentences81
filterMatches
0"watch"
hedgeMatches
0"start to"
1"tried to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences84
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen53
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans3
markdownWords6
totalWords1192
ratio0.005
matches
0"unexplained circumstances"
1"Go back."
2"unexplained circumstances"
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions8
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions23
wordCount1120
uniqueNames11
maxNameDensity0.63
worstName"Quinn"
maxWindowNameDensity1
worstWindowName"Quinn"
discoveredNames
Camden1
Quinn7
Morris3
Herrera3
Soho1
Silas1
Vane1
Tube3
Saint1
Christopher1
Harlow1
persons
0"Quinn"
1"Morris"
2"Herrera"
3"Silas"
4"Vane"
5"Saint"
6"Christopher"
7"Harlow"
places
0"Soho"
globalScore1
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences63
glossingSentenceCount1
matches
0"looked like dried plants and the small wh"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.839
wordCount1192
matches
0"not in surrender, but in a small, urgent gesture"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences84
matches
0"know that face"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs29
mean41.1
std29.65
cv0.721
sampleLengths
082
119
218
363
460
575
677
75
883
921
1012
11102
1225
1382
1428
153
1632
1776
187
1978
2014
2129
2255
2356
2415
2527
2611
2715
2822
87.94% Passive voice overuse
Target: ≤2% passive sentences
passiveCount4
totalSentences81
matches
0"been bricked"
1"been open"
2"were hung"
3"was gone"
85.06% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount3
totalVerbs174
matches
0"was seeing"
1"was selling"
2"was paying"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount5
semicolonCount0
flaggedSentences5
totalSentences84
ratio0.06
matches
0"The man in the dark jacket cut left around a shuttered kebab shop, and the green wash of a traffic light slid across his face for half a second—olive skin, a flash of something silver swinging at his throat."
1"The fluorescent buzz of the street gave way to something warmer and stranger—lanterns, she realized, actual flame in glass, throwing amber light across walls that should have been bare concrete but instead were hung with woven cloth and pinned with what looked like dried plants and the small white shapes of bones."
2"Beyond her, a hunched figure in a leather apron weighed something on a brass scale—teeth, Quinn thought, and refused to think it again."
3"And his face—that was the thing that snagged her, that stayed with her afterward."
4"He lifted one hand—not in surrender, but in a small, urgent gesture."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1131
adjectiveStacks0
stackExamples(empty)
adverbCount32
adverbRatio0.028293545534924844
lyAdverbCount4
lyAdverbRatio0.0035366931918656055
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences84
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences84
mean14.19
std10.55
cv0.743
sampleLengths
019
124
239
32
46
511
613
75
814
930
105
1114
1227
133
1423
153
164
177
186
1935
2010
212
222
232
2411
2517
2613
2723
2818
296
305
319
3217
3326
3431
357
362
3712
3812
3911
4052
4139
426
4319
4427
4523
4620
4712
487
4921
75.00% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats7
diversityRatio0.5
totalSentences84
uniqueOpeners42
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount3
totalSentences73
matches
0"Just a closed casket, a"
1"Instead he looked at her"
2"Then the crowd folded around"
ratio0.041
93.97% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount23
totalSentences73
matches
0"She ran low and hard,"
1"She'd know that face anywhere"
2"Her voice tore through the"
3"He didn't even glance back."
4"She wasn't about to start"
5"He vaulted a low railing"
6"She hit the railing, swung"
7"She ignored it."
8"She slowed at the threshold,"
9"You did not follow a"
10"She'd promised herself, standing at"
11"She stopped on the last"
12"Her cop's brain tried to"
13"he said, His gaze flicked"
14"He'd stopped maybe forty feet"
15"She'd expected the wide-eyed fear"
16"He lifted one hand—not in"
17"She thought of the closed"
18"She was certain of it"
19"She slid the warrant card"
ratio0.315
96.99% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount53
totalSentences73
matches
0"The rain came down in"
1"She ran low and hard,"
2"The man in the dark"
3"She'd know that face anywhere"
4"Her voice tore through the"
5"He didn't even glance back."
6"She wasn't about to start"
7"Herrera was the loose stitch."
8"He vaulted a low railing"
9"Quinn's lungs burned."
10"She hit the railing, swung"
11"She ignored it."
12"Pain was just information."
13"The station entrance shouldn't have"
14"That was the first wrong"
15"The corrugated hoarding the council"
16"A sweetness underneath that made"
17"She slowed at the threshold,"
18"Every instinct she'd built across"
19"You did not follow a"
ratio0.726
100.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount3
totalSentences73
matches
0"To stand at the top"
1"As though she were the"
2"As though he wanted to"
ratio0.041
45.45% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences44
technicalSentenceCount6
matches
0"The corrugated hoarding the council had bolted across it stood peeled back like the lid of a tin, and beyond it a stairwell descended into a darkness that didn'…"
1"The fluorescent buzz of the street gave way to something warmer and stranger—lanterns, she realized, actual flame in glass, throwing amber light across walls th…"
2"At the bottom, where a Tube platform should have stretched, the space opened into something vast and impossible, a cavern of stalls and canvas and shifting bodi…"
3"A woman at the nearest stall was selling vials that glowed faintly blue, the liquid inside moving against the tilt of the glass instead of with it."
4"Nobody except the broad-shouldered man at the entry post, who looked up from his ledger and held out one flat palm."
5"The man looked at the card, then at her, and something in his expression curdled from boredom into a cold, narrow attention that made her grip tighten on the gu…"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags6
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags4
fancyCount0
fancyTags(empty)
dialogueSentences9
tagDensity0.444
leniency0.889
rawRatio0
effectiveRatio0
89.2816%