Run: 2026-06-01-01KT1H3WHP63Q1B4F6J48VTAVN

Run Details

Duration:
41.4s
Cost:
$0.059795
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 like it had a grudge, hammering the pavement of Camden High Street until the gutters ran black and silver under the streetlights. Detective Harlow Quinn ran through it with her coat plastered to her shoulders, her boots throwing up sheets of water, her eyes locked on the figure thirty yards ahead. Tomás Herrera could move. She'd give him that. The former paramedic cut between a bus shelter and a shuttered kebab shop with a kind of fluid economy, never wasting a step, his curly dark hair flattened black against his skull. He glanced back once. In the wash of a passing taxi's headlights she caught the warm brown of his eyes, wide and calculating, and the glint of the little medallion bouncing against his throat. Then he was gone again, swallowed by the dark mouth of an alley. "Herrera!" Her voice tore loose, swallowed by the rain. "Police! Stop!" He didn't stop. They never did. Eighteen years on the job had taught Quinn the geometry of a foot chase — when to cut a corner, when to commit, when a runner was making for somewhere specific and when he was just running scared. Tomás wasn't scared. That was what set the cold thread of unease running down her spine. He had a destination. He'd led her off the main drag with purpose, drawing her north past the locks, past the market stalls battened down for the night under their wet tarpaulins, into the warren of brick and shadow behind the canal. She pushed harder, lungs burning, the worn leather strap of her watch chafing against her wrist as she pumped her arms. Forty-one years old and she could still run down men a decade younger. Mostly. Her partner used to joke about that. Morris, with his terrible coffee and his terrible jokes, three years in the ground now and no good answer for any of it. She didn't let herself think about Morris. Not while she was running. The alley spat her out into a dead-end yard — and there, against the far wall, was the thing she'd been chasing toward without knowing it. A staircase. Iron-railed, descending into the earth beside a defunct ventilation grate, the kind of access shaft that belonged to one of the dozens of ghost stations buried under the city like fossils. Above it, half-obscured by ivy and grime, the ceramic remnant of an old roundel. Disused for eighty years, if the Transport for London maps she kept in her head were right. Tomás was at the bottom of the stairs, fumbling with something at a steel door. He turned, saw her at the lip of the descent, and for a moment the two of them simply looked at each other through the falling rain. "Go home, Detective." His accent rounded the words, Seville under the London. He was breathing hard, one hand pressed to the door. "This isn't a place for you." "Then it shouldn't be a place for you either." She came down two steps, slow, her hand drifting toward the holster under her sodden coat. "Whatever you're carrying for them, Tomás — whatever you patched up tonight — we can talk about it upstairs. Dry. Just you and me." Something flickered across his face. Not fear. Pity, maybe, which was worse. "You don't understand what's down here." He held up the thing in his hand — small, pale, the size of a domino. A bone, she realized. Carved, polished, threaded on a leather cord. "And once you do, you can't un-know it. Trust me. I lost everything because I couldn't un-know it." "I lost my partner," Quinn said, and didn't know why she said it. The rain pounded on. "Three years ago. To something I never got a straight answer about. You want to talk about un-knowing? I've spent three years not-knowing. I'm done with it." He went very still. "Morris," he said softly. The name hit her like a fist. She hadn't said it. She was certain she hadn't said it. The cold in her spine spread outward, into her ribs, her fingers. "How do you know that name?" "Because down here," Tomás said, "people still talk about what happened to him." He pressed the bone token into a slot beside the door, and a green light bloomed in the dark, the same poisonous green as the neon over Silas' bar across town — she'd clocked that detail weeks ago, filed it away, the way the whole rotten little clique seemed lit by the same sick glow. The steel door shuddered and began to grind inward. Warm air breathed out of the gap, carrying smells that didn't belong eighty feet under Camden: incense, and copper, and something floral and chemical that made the back of her throat tighten. Beneath it, the murmur of a crowd. Voices. Many voices, in a place that should have been empty for eight decades. She got to the bottom of the stairs. Through the widening gap she could see it — a platform, the old tiled walls still clinging to fragments of advertisements for soap and cigarettes, and stalls. Dozens of them, lit by lanterns and by lights that had no obvious source, draped in fabrics that seemed to drink the glow rather than reflect it. Figures moved between them. A woman with a tray of glass vials that pulsed faintly. A man wrapped in furs in the heat, weighing out grey powder on a brass scale. Somewhere a voice was singing in a language that made her teeth ache. Quinn's training screamed at her. No backup. No radio signal down here, she'd bet her pension on it. No idea who or what was waiting past that threshold, and a suspect actively luring her in. Every protocol she'd ever learned told her to hold the stairs, call it in topside, come back with a unit and a warrant and the comfortable certainties of the law. And every protocol assumed a world that made sense. Tomás stood in the doorway, half in the green light, half in the dark. "Last chance," he said. "Walk away, and you go on living in the not-knowing. Step through, and there's no door back to who you were this morning." He paused. "I went through once. I never found the door back." The rain dripped off Quinn's jaw, off the sharp line of it, ran cold down inside her collar. She thought of Morris. Of the report that said nothing, explained nothing. Three years of a question with no shape. She drew her weapon, kept it low, and stepped down off the last stair onto the threshold of the Veil Market. "Show me," she said.
created_at"2026-06-01T12:04:11.965Z" 6/1/2026, 12:04:11 PM
model"anthropic/claude-4.8-opus-20260528"
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generation_time41346
tokens_prompt914
tokens_completion1660
native_tokens_prompt1264
native_tokens_completion2139
native_tokens_completion_images(null)
native_tokens_reasoning65
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
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origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
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provider_responses
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is_byokfalse
latency1309
model_permaslug"anthropic/claude-4.8-opus-20260528"
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status200
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Evaluation details

Result Evaluator Details Meta Data
100.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags10
adverbTagCount1
adverbTags
0"he said softly [softly]"
dialogueSentences17
tagDensity0.588
leniency1
rawRatio0.1
effectiveRatio0.1
91.00% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1111
totalAiIsmAdverbs2
found
0
adverb"very"
count1
1
adverb"softly"
count1
highlights
0"very"
1"softly"
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)
73.00% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1111
totalAiIsms6
found
0
word"calculating"
count1
1
word"glint"
count1
2
word"down her spine"
count1
3
word"flickered"
count1
4
word"pulsed"
count1
5
word"comfortable"
count1
highlights
0"calculating"
1"glint"
2"down her spine"
3"flickered"
4"pulsed"
5"comfortable"
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
narrationSentences75
matches(empty)
66.67% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount2
hedgeCount2
narrationSentences75
filterMatches
0"watch"
1"think"
hedgeMatches
0"began to"
1"seemed to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences82
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen67
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1118
ratio0
matches(empty)
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions11
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions25
wordCount935
uniqueNames13
maxNameDensity0.53
worstName"Quinn"
maxWindowNameDensity1
worstWindowName"Quinn"
discoveredNames
Camden2
High1
Street1
Harlow1
Quinn5
Herrera1
Morris3
Transport1
London2
Seville1
Veil1
Market1
Tomás5
persons
0"Harlow"
1"Quinn"
2"Herrera"
3"Morris"
4"Tomás"
places
0"Camden"
1"High"
2"Street"
3"London"
4"Seville"
globalScore1
windowScore1
98.98% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences49
glossingSentenceCount1
matches
0"fabrics that seemed to drink the glow rather than reflect it"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1118
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences82
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs26
mean43
std35.14
cv0.817
sampleLengths
055
187
211
36
496
565
612
790
842
928
1049
1112
1251
1344
144
154
1630
176
18130
19106
2065
219
2253
2338
2421
254
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount1
totalSentences75
matches
0"was gone"
0.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount6
totalVerbs142
matches
0"was making"
1"was just running"
2"was running"
3"was breathing"
4"was singing"
5"was waiting"
3.48% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount4
semicolonCount0
flaggedSentences4
totalSentences82
ratio0.049
matches
0"Eighteen years on the job had taught Quinn the geometry of a foot chase — when to cut a corner, when to commit, when a runner was making for somewhere specific and when he was just running scared."
1"The alley spat her out into a dead-end yard — and there, against the far wall, was the thing she'd been chasing toward without knowing it."
2"\"You don't understand what's down here.\" He held up the thing in his hand — small, pale, the size of a domino."
3"Through the widening gap she could see it — a platform, the old tiled walls still clinging to fragments of advertisements for soap and cigarettes, and stalls."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount645
adjectiveStacks0
stackExamples(empty)
adverbCount15
adverbRatio0.023255813953488372
lyAdverbCount4
lyAdverbRatio0.006201550387596899
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences82
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences82
mean13.63
std11.53
cv0.846
sampleLengths
026
129
24
34
432
54
630
713
89
92
103
113
1238
133
1413
154
1638
1721
1813
191
207
2123
227
235
2426
252
2631
2714
2817
2915
3027
3112
3210
336
3425
3524
365
372
385
3922
404
417
4218
4313
444
4527
464
474
487
494
91.46% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats5
diversityRatio0.5853658536585366
totalSentences82
uniqueOpeners48
99.50% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount2
totalSentences67
matches
0"Then he was gone again,"
1"Somewhere a voice was singing"
ratio0.03
88.66% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount22
totalSentences67
matches
0"She'd give him that."
1"He glanced back once."
2"Her voice tore loose, swallowed"
3"He didn't stop."
4"They never did."
5"He had a destination."
6"He'd led her off the"
7"She pushed harder, lungs burning,"
8"Her partner used to joke"
9"She didn't let herself think"
10"He turned, saw her at"
11"His accent rounded the words,"
12"He was breathing hard, one"
13"She came down two steps,"
14"He held up the thing"
15"He went very still."
16"he said softly"
17"She hadn't said it."
18"She was certain she hadn't"
19"She got to the bottom"
ratio0.328
100.00% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount48
totalSentences67
matches
0"The rain came down like"
1"Detective Harlow Quinn ran through"
2"Tomás Herrera could move."
3"She'd give him that."
4"The former paramedic cut between"
5"He glanced back once."
6"Her voice tore loose, swallowed"
7"He didn't stop."
8"They never did."
9"Tomás wasn't scared."
10"That was what set the"
11"He had a destination."
12"He'd led her off the"
13"She pushed harder, lungs burning,"
14"Her partner used to joke"
15"Morris, with his terrible coffee"
16"She didn't let herself think"
17"The alley spat her out"
18"Iron-railed, descending into the earth"
19"Tomás was at the bottom"
ratio0.716
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences67
matches(empty)
ratio0
75.89% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences32
technicalSentenceCount3
matches
0"She pushed harder, lungs burning, the worn leather strap of her watch chafing against her wrist as she pumped her arms."
1"Iron-railed, descending into the earth beside a defunct ventilation grate, the kind of access shaft that belonged to one of the dozens of ghost stations buried …"
2"Warm air breathed out of the gap, carrying smells that didn't belong eighty feet under Camden: incense, and copper, and something floral and chemical that made …"
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)
dialogueSentences17
tagDensity0.294
leniency0.588
rawRatio0
effectiveRatio0
86.2881%