Run: 2026-09-23-01M37PAC70BSMKHX6NE6XQX7VA

Run Details

Duration:
55.6s
Cost:
$0.079284
Provider:
Claude Platform on AWS

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 had turned Camden High Street into a smear of reflected light, sodium orange and brake-light red bleeding together in the gutters, and Harlow Quinn ran through all of it with her lungs on fire. Forty meters ahead, Tomás Herrera ducked under the awning of a shuttered vape shop, glanced back once, and broke left into an alley. She had tailed him from Soho. Two hours in an unmarked Vauxhall outside the Raven's Nest, watching that green neon sign buzz above the door, waiting. When he finally came out, collar up, a canvas bag slung across his chest, she'd followed his minicab north through the wet dark to Camden. She'd let him walk three blocks before she closed the distance, and she'd been doing fine until a drunk in a Arsenal shirt stumbled out of a kebab shop and shouted her name. *Oi, it's the copper from Tuesday.* Herrera had turned, seen her, and run. Quinn took the corner hard. Her shoulder clipped the brickwork, and a sheet of cold water sluiced off a broken gutter and down the back of her neck. The alley was narrow and black and stank of bins. At the far end, a figure vaulted a stack of pallets and dropped out of sight. "Police!" The word bounced off the walls and went nowhere. It never did any good. She said it anyway, because eighteen years had worn it into her like a groove. She hit the pallets, planted a hand, and swung over. Her knee protested. Forty-one wasn't old, but it wasn't twenty-three, either, and the wet wood slid under her palm. She landed badly, caught herself, and kept moving. Beyond the alley was a service road running along the back of the railway arches. Herrera was sprinting beneath them, past a row of padlocked garages, past a skip overflowing with plasterboard. He was fast. Paramedic fast, she thought, the kind of man who'd spent years running up tower-block stairwells with a defib kit. But he'd been running flat out for three minutes now, and she could see it in him: the stride shortening, the arms starting to flail. She could see something else, too. He wasn't running *away*. He was running *toward* something. At the end of the arches stood a stretch of blue construction hoarding, the kind that went up around dead buildings and stayed there for a decade. Faded posters for a gig that had happened in 2019. A council notice curling off its staples. Herrera went straight for a seam in the boards where one panel had been pried loose. Quinn put everything she had left into the last twenty meters. He was halfway through the gap when she reached him. She got a fistful of his jacket and pulled. He twisted, and for one close, rain-streaked second they were face to face: dark curls plastered to his forehead, warm brown eyes wide with something that wasn't quite fear. A Saint Christopher medallion had worked loose from his collar and swung on its chain between them. "Don't," he said, breathless. "Detective. Please. Not here." "Tomás Herrera, I'm—" He wrenched sideways. The jacket's pocket seam tore with a sound like a zip, and he slipped through the hoarding and was gone. Quinn stumbled back, holding a strip of wet canvas. Things had spilled from the torn pocket onto the pavement. A blister pack of something unlabeled. A roll of surgical tape. A lighter. And a small, pale disc, no wider than a two-pence coin, that caught the streetlight and glowed faintly, like old ivory. She crouched and picked it up. It was bone. She was sure of it the moment her fingers closed on it: too light for stone, too dense for plastic, faintly porous under her thumb. Someone had carved it with a symbol she didn't recognize, a spiral that folded back into itself, and drilled a hole through the center. It was warm. Not body-warm. Warmer than it should have been in this rain. Quinn turned it over, frowning. Herrera had stopped at the gap. He hadn't been searching his pockets. Whatever this was, he'd had another one. *So who was the second one for?* She stood and shone her phone torch through the hoarding. Beyond it lay a rubble-strewn yard and the squat brick shell of a building she'd walked past a hundred times without seeing: tiled in oxblood red, arched windows bricked up, the ghost of a London Underground roundel still visible above a door that someone had recently oiled. The door stood open a hand's width. A disused station. Camden had a few of them, sealed up before the war, forgotten by everyone but the trainspotters and the rats. Quinn squeezed through the gap. Inside, the air changed. The traffic noise of the High Street dropped away as if someone had closed a window. Her torch found a ticket hall choked with dust and pigeon feathers, a wooden booth with its glass long gone, and a spiral staircase leading down into the dark. The iron treads were wet with fresh footprints. And from below, faint and impossible, came the sound of voices. Hundreds of them. The murmur of a crowd, the clink of glass, a laugh, someone haggling in a language she couldn't place. It drifted up the stairwell on air that smelled of candle wax and cloves and something sharper underneath, a metallic tang like the air before a lightning storm. She checked her phone. No signal. Of course. Quinn stood at the top of the stairs and did the thing she'd been trained to do, the thing she'd done a thousand times: she assessed. No backup. No radio. Nobody knew where she was. The suspect had fled into a confined underground space of unknown size and occupancy. Procedure was clear. You withdrew, you called it in, you came back with a team. She looked down at the worn leather watch on her left wrist. 11:47. The second hand ticked on, steady, indifferent. Three years ago, she and DS Morris had followed a man into the basement of a derelict house in Walthamstow. It had been a routine thing, a missing-persons lead, nothing that should have gone wrong. She'd gone left to check a side room. Morris had gone right. She'd heard him say her name once, quite calmly, the way you'd say it across a desk. By the time she got to him, there was nothing in that room but a cold spot on the floor and a smell like struck matches. The coroner never got a body. The report said *misadventure*. Quinn had read it forty times and never believed a word. She'd spent three years chasing the shape of that night, and every thread she pulled led back to the same people. The same bar in Soho. The same clique who drank under those old maps and faded photographs and fell silent whenever she walked in. Herrera was one of them. And Herrera had just run down there with a bone key in his pocket, and he'd looked at her not like a suspect cornered but like a man watching someone step toward the edge of a platform. *Not here.* Quinn went down. The staircase turned and turned. The candle-and-clove smell thickened. Light rose to meet her, warm and flickering, not electric. At the bottom, the old passage to the platforms had been hung with heavy curtains of dark velvet, and in front of them stood a figure on a tall stool, wrapped in a long coat, face lost in the shadow of a wide-brimmed hat. A lantern hung beside it, burning with a flame the color of weak tea. The figure held out one gloved hand, palm up. It said nothing. Beyond the curtain, the crowd noise swelled and ebbed like breathing. Somewhere in there was Tomás Herrera. Somewhere in there, maybe, was the answer to a question she'd stopped asking out loud. Quinn's hand was steady. She made sure of that. Military bearing, her first sergeant had called it, back when it had been an insult. She stood straight, chin level, and looked at the place where the figure's eyes should have been. Then she set the warm bone disc in its palm. The glove closed. The figure tilted its head, a slow, considering motion, as though it had caught a scent it didn't recognize. For a long moment, nothing happened. The lantern flame leaned toward her. Then the figure reached back and drew the velvet aside. Light and noise poured over her: stalls strung beneath the curved tiles of the old platform, glass bottles glowing in colors she had no names for, a hundred faces turning, some of them not quite faces at all. Quinn checked her watch one last time, 11:52, and stepped into the Veil Market.
created_at"2026-09-23T17:51:50.514Z" 9/23/2026, 5:51:50 PM
model"anthropic/claude-opus-5.5-20260921"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4787
moderation_latency(null)
generation_time55592
tokens_prompt888
tokens_completion2396
native_tokens_prompt1266
native_tokens_completion3711
native_tokens_completion_images(null)
native_tokens_reasoning904
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"
usage0.079284
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790185910-r2lPigh27wp3HilZzjdQ"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790185910-MEjgw2Ra3AcNUnl8qdOx"
upstream_id"msg_011CfLo9RZPb1cfZewmWJ93B"
provider_responses
0
endpoint_id"3a2388bc-3740-4e64-a1f5-4e301726b6b9"
id"msg_011CfLo9RZPb1cfZewmWJ93B"
is_byokfalse
latency1246
model_permaslug"anthropic/claude-opus-5.5-20260921"
provider_name"Claude Platform on AWS"
status200
total_cost0.079284
cache_discount(null)
upstream_inference_cost0
provider_name"Claude Platform on AWS"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

Evaluation details

Result Evaluator Details Meta Data
100.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags2
adverbTagCount0
adverbTags(empty)
dialogueSentences4
tagDensity0.5
leniency1
rawRatio0
effectiveRatio0
100.00% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1470
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)
89.80% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1470
totalAiIsms3
found
0
word"electric"
count1
1
word"velvet"
count2
highlights
0"electric"
1"velvet"
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
narrationSentences122
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount3
hedgeCount0
narrationSentences122
filterMatches
0"notice"
1"watch"
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences124
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen48
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans6
markdownWords18
totalWords1470
ratio0.012
matches
0"Oi, it's the copper from Tuesday."
1"away"
2"toward"
3"So who was the second one for?"
4"misadventure"
5"Not here."
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions3
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions44
wordCount1461
uniqueNames20
maxNameDensity0.75
worstName"Quinn"
maxWindowNameDensity1.5
worstWindowName"Herrera"
discoveredNames
Camden3
High2
Street2
Harlow1
Quinn11
Tomás2
Herrera8
Soho2
Vauxhall1
Raven1
Nest1
Arsenal1
Saint1
Christopher1
London1
Underground1
Morris2
Walthamstow1
Veil1
Market1
persons
0"Harlow"
1"Quinn"
2"Tomás"
3"Herrera"
4"Nest"
5"Saint"
6"Christopher"
7"Morris"
places
0"Camden"
1"High"
2"Street"
3"Soho"
4"Vauxhall"
5"Raven"
6"Arsenal"
7"London"
8"Walthamstow"
9"Veil"
globalScore1
windowScore1
90.48% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences84
glossingSentenceCount2
matches
0"quite fear"
1"not quite faces at all"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.68
wordCount1470
matches
0"not like a suspect cornered but like a man watching someone step toward the edge of a platfo"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences124
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs42
mean35
std26.84
cv0.767
sampleLengths
036
123
290
37
454
530
637
779
815
960
1011
1165
128
133
1432
1544
166
1766
1824
197
2064
2123
225
2357
2461
258
2664
2720
28111
2945
3042
312
323
3377
3412
3532
3641
3710
3834
3910
4038
4114
93.76% Passive voice overuse
Target: ≤2% passive sentences
passiveCount4
totalSentences122
matches
0"been pried"
1"was gone"
2"been trained"
3"been hung"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount3
totalVerbs232
matches
0"was sprinting"
1"wasn't running"
2"was running"
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount0
semicolonCount0
flaggedSentences0
totalSentences124
ratio0
matches(empty)
94.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1473
adjectiveStacks1
stackExamples
0"brake-light red bleeding"
adverbCount34
adverbRatio0.02308214528173795
lyAdverbCount6
lyAdverbRatio0.004073319755600814
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences124
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences124
mean11.85
std9.56
cv0.806
sampleLengths
036
123
26
320
425
533
66
77
85
923
1010
1116
1210
135
1415
1510
163
1716
188
1915
2017
213
2219
2325
246
254
265
2727
2810
297
3016
3111
3210
339
3429
3517
364
374
383
393
4020
419
4210
436
445
452
4621
476
483
4925
51.49% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats10
diversityRatio0.35772357723577236
totalSentences123
uniqueOpeners44
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount4
totalSentences114
matches
0"Somewhere in there was Tomás"
1"Somewhere in there, maybe, was"
2"Then she set the warm"
3"Then the figure reached back"
ratio0.035
97.19% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount35
totalSentences114
matches
0"She had tailed him from"
1"She'd let him walk three"
2"Her shoulder clipped the brickwork,"
3"It never did any good."
4"She said it anyway, because"
5"She hit the pallets, planted"
6"Her knee protested."
7"She landed badly, caught herself,"
8"He was fast."
9"She could see something else,"
10"He wasn't running *away*."
11"He was running *toward* something."
12"He was halfway through the"
13"She got a fistful of"
14"He twisted, and for one"
15"he said, breathless"
16"He wrenched sideways."
17"She crouched and picked it"
18"It was bone."
19"She was sure of it"
ratio0.307
87.19% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount85
totalSentences114
matches
0"The rain had turned Camden"
1"She had tailed him from"
2"She'd let him walk three"
3"Herrera had turned, seen her,"
4"Quinn took the corner hard."
5"Her shoulder clipped the brickwork,"
6"The alley was narrow and"
7"The word bounced off the"
8"It never did any good."
9"She said it anyway, because"
10"She hit the pallets, planted"
11"Her knee protested."
12"She landed badly, caught herself,"
13"Herrera was sprinting beneath them,"
14"He was fast."
15"She could see something else,"
16"He wasn't running *away*."
17"He was running *toward* something."
18"A council notice curling off"
19"Herrera went straight for a"
ratio0.746
43.86% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences114
matches
0"By the time she got"
ratio0.009
46.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences59
technicalSentenceCount8
matches
0"Two hours in an unmarked Vauxhall outside the Raven's Nest, watching that green neon sign buzz above the door, waiting."
1"Paramedic fast, she thought, the kind of man who'd spent years running up tower-block stairwells with a defib kit."
2"He twisted, and for one close, rain-streaked second they were face to face: dark curls plastered to his forehead, warm brown eyes wide with something that wasn'…"
3"And a small, pale disc, no wider than a two-pence coin, that caught the streetlight and glowed faintly, like old ivory."
4"It drifted up the stairwell on air that smelled of candle wax and cloves and something sharper underneath, a metallic tang like the air before a lightning storm…"
5"It had been a routine thing, a missing-persons lead, nothing that should have gone wrong."
6"The same clique who drank under those old maps and faded photographs and fell silent whenever she walked in."
7"The figure tilted its head, a slow, considering motion, as though it had caught a scent it didn't recognize."
0.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags2
uselessAdditionCount1
matches
0"he said, breathless"
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags1
fancyCount0
fancyTags(empty)
dialogueSentences4
tagDensity0.25
leniency0.5
rawRatio0
effectiveRatio0
89.7924%