Run: 2026-06-01-01KT1J86EE9494BJF5D8BFEZD3

Run Details

Duration:
41.9s
Cost:
$0.064970
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 sideways, hammering the gutters of Camden until they overflowed and turned the pavement into a black mirror. Detective Harlow Quinn ran through it with her coat plastered to her shoulders, water streaming off her cropped hair and into her eyes, and she did not slow down. Thirty feet ahead, the man she had been watching for six weeks ducked between a shuttered kebab shop and a wall plastered with sodden gig posters. Tomás Herrera. She knew the name now, knew the face — olive skin, dark curls flattened by the downpour, a Saint Christopher medallion that caught the streetlight when he glanced back over his shoulder. He was fast, but she was patient, and patience had a way of outlasting speed. "Herrera!" she shouted. Her voice cracked against the rain and went nowhere. "Police! Stop where you are!" He did not stop. They never did. Her boots slammed through a puddle deep enough to swallow her ankle, and she felt the cold bite straight up her shin, but she kept her arms pumping, kept her breathing measured, the way she'd been trained eighteen years ago when she'd still believed the world was a place that obeyed rules. Herrera vaulted a low railing without breaking stride and dropped down a flight of stone steps into the dark. She knew those steps. Everyone in Camden walked past them a hundred times without seeing them — the boarded entrance to a Tube station that had closed before either of them was born, the grille rusted, the sign long since scraped clean. Except the grille wasn't rusted shut tonight. It hung open on a gap just wide enough for a man. Quinn reached the top of the steps and stopped. Below her, the stairwell descended into a throat of pure black, and out of it came a smell she couldn't place — wet stone, yes, but underneath it something sweeter and stranger, like incense burning over hot copper. Faint music drifted up, threaded with voices, the murmur of a crowd that should not have existed in an abandoned station beneath a dead city street. Herrera's footsteps were already fading into it. She stood at the edge with the rain drumming on her skull and her hand resting on the railing, and for the first time in a long while, Harlow Quinn hesitated. Three years. Three years since DS Morris had walked into a place like this — a doorway that shouldn't open, a stairwell that went down further than the blueprints allowed — and had never walked back out. They'd found his car. They'd found his radio, his notebook, his wedding ring placed neatly on the dashboard as if he'd taken it off himself. They had never found him. The official report said *missing, presumed deceased.* The report did not mention the way the air had smelled at the scene, copper and incense, or the way her own watch had stopped at the threshold and refused to start again until she'd stepped back into the rain. She glanced down at the worn leather strap on her left wrist now. The second hand was still moving. Good. Every instinct sharpened by eighteen years of decorated service told her to call it in. Establish a perimeter. Wait for backup. Do not pursue a fleeing suspect into an unsecured location with no light, no exits confirmed, no idea what waited at the bottom. That was the rule. That was the protocol that kept officers alive. But there was no backup coming. She hadn't told anyone where she was tonight, because the people she'd have to tell would look at her the way they'd looked at her after Morris — with that careful, patient pity, *poor Quinn, still chasing ghosts.* If she radioed this in, they'd find an empty stairwell and a boarded door, because that was what these places did. They closed. They moved. The thing she had learned, slowly and against her will, was that the world she policed had a second world folded inside it, and that second world did not wait around to be investigated. Herrera knew the way in. Herrera was the thread. If she lost him now, she lost everything — and she had spent three years refusing to lose anything else to the dark. Quinn unholstered her weapon, checked it by feel, and started down the steps. The temperature dropped with each one. By the tenth she could no longer hear the rain, only the music and the rising hum of voices and, beneath that, the soft drip of water finding its way through a hundred feet of London clay. The walls were tiled in the cracked cream of a forgotten platform, and someone had painted symbols over them in something dark that she chose not to examine too closely. At the bottom the passage opened, and her breath caught despite herself. The station had become a market. Stalls crowded the old platform beneath strings of lantern-light that burned in colors she had no name for — a green that throbbed like a pulse, a blue so cold it looked like it should hurt. The vaulted ceiling vanished into smoke. Figures moved among the stalls in cloaks and fine coats and a few in nothing she could parse as clothing at all, haggling over jars of luminous liquid, over folded papers, over things that twitched in cages of woven bone. A woman with too many fingers weighed silver dust on a brass scale. The sweet copper smell was everywhere now, thick enough to taste. A hand closed on Quinn's arm before she'd taken three steps onto the platform. A boy, no older than twelve, with eyes that reflected the lantern-light like a cat's. "Token," he said. "No token, no Market. That's the rule, lady." "I'm not buying anything." She kept her voice level, kept scanning the crowd for a flattened head of dark curls. There — moving fast along the far wall, glancing back, the medallion swinging. "Police business." The boy laughed, a small dry sound. "No police down here. No business but ours." His grip tightened, and his small fingers were impossibly strong. "Token, or you go back up the stairs." Quinn's pulse beat hard in her throat. Across the platform, Herrera reached a doorway hung with a curtain of green light and turned, and for one suspended instant their eyes met across the impossible room — his wide with something that was not quite fear, something closer to warning. Then he was gone through the curtain, and the boy was pulling her backward toward the steps, and Quinn made her choice the way she made all the ones that mattered: fast, and without permission. She reached into her coat, past the badge that meant nothing here, and pulled out the small pale object she'd taken off a body in an evidence locker six weeks ago and never logged. A token, carved from bone, smooth from handling. The boy went very still. His cat-bright eyes lifted to hers, and something old and careful settled behind them. "Well," he said softly, releasing her arm. "Then welcome to the Veil Market, Detective. Mind your manners. The Market remembers everyone who comes down — and it doesn't always let them leave." Quinn stepped past him into the smoke and the lantern-light, gun low against her thigh, and went after the man through the green door.
created_at"2026-06-01T12:24:01.748Z" 6/1/2026, 12:24:01 PM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency7232
moderation_latency(null)
generation_time41918
tokens_prompt914
tokens_completion1858
native_tokens_prompt1264
native_tokens_completion2346
native_tokens_completion_images(null)
native_tokens_reasoning62
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"
usage0.06497
router(null)
provider_responses
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endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
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is_byokfalse
latency1042
model_permaslug"anthropic/claude-4.8-opus-20260528"
provider_name"Anthropic"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.16.0; linux; x64))"
http_referer(null)
request_id"req-1780316641-x4otjxC3RpUd6reYh72S"
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api_type"completions"
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upstream_id"msg_01SDURuGfPgdHbDQkidvFj2x"
total_cost0.06497
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upstream_inference_cost0
provider_name"Anthropic"
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Evaluation details

Result Evaluator Details Meta Data
0.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags5
adverbTagCount1
adverbTags
0"he said softly [softly]"
dialogueSentences10
tagDensity0.5
leniency1
rawRatio0.2
effectiveRatio0.2
87.75% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1224
totalAiIsmAdverbs3
found
0
adverb"slowly"
count1
1
adverb"very"
count1
2
adverb"softly"
count1
highlights
0"slowly"
1"very"
2"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)
67.32% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1224
totalAiIsms8
found
0
word"streaming"
count1
1
word"pumping"
count1
2
word"measured"
count1
3
word"footsteps"
count1
4
word"throbbed"
count1
5
word"pulse"
count2
6
word"scanning"
count1
highlights
0"streaming"
1"pumping"
2"measured"
3"footsteps"
4"throbbed"
5"pulse"
6"scanning"
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
narrationSentences71
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount0
narrationSentences71
filterMatches(empty)
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences76
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen58
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans2
markdownWords8
totalWords1235
ratio0.006
matches
0"missing, presumed deceased."
1"poor Quinn, still chasing ghosts."
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
totalMentions25
wordCount1172
uniqueNames9
maxNameDensity0.77
worstName"Quinn"
maxWindowNameDensity1.5
worstWindowName"Quinn"
discoveredNames
Camden2
Harlow2
Quinn9
Herrera6
Saint1
Christopher1
Tube1
Morris2
London1
persons
0"Harlow"
1"Quinn"
2"Herrera"
3"Saint"
4"Christopher"
5"Morris"
places
0"Tube"
1"London"
globalScore1
windowScore1
55.66% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences53
glossingSentenceCount2
matches
0"looked like it should hurt"
1"not quite fear, something closer to warning"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.81
wordCount1235
matches
0"No business but"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences76
matches
0"was that the"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs28
mean44.11
std33.04
cv0.749
sampleLengths
049
175
217
37
4113
519
69
771
831
9114
1020
1156
12103
1332
1413
1585
166
17106
1829
1911
2035
2133
2249
2335
2442
2519
2632
2724
90.44% Passive voice overuse
Target: ≤2% passive sentences
passiveCount3
totalSentences71
matches
0"been trained"
1"were tiled"
2"was gone"
97.44% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount3
totalVerbs195
matches
0"were already fading"
1"was still moving"
2"was pulling"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount10
semicolonCount0
flaggedSentences9
totalSentences76
ratio0.118
matches
0"She knew the name now, knew the face — olive skin, dark curls flattened by the downpour, a Saint Christopher medallion that caught the streetlight when he glanced back over his shoulder."
1"Everyone in Camden walked past them a hundred times without seeing them — the boarded entrance to a Tube station that had closed before either of them was born, the grille rusted, the sign long since scraped clean."
2"Below her, the stairwell descended into a throat of pure black, and out of it came a smell she couldn't place — wet stone, yes, but underneath it something sweeter and stranger, like incense burning over hot copper."
3"Three years since DS Morris had walked into a place like this — a doorway that shouldn't open, a stairwell that went down further than the blueprints allowed — and had never walked back out."
4"She hadn't told anyone where she was tonight, because the people she'd have to tell would look at her the way they'd looked at her after Morris — with that careful, patient pity, *poor Quinn, still chasing ghosts.* If she radioed this in, they'd find an empty stairwell and a boarded door, because that was what these places did."
5"If she lost him now, she lost everything — and she had spent three years refusing to lose anything else to the dark."
6"Stalls crowded the old platform beneath strings of lantern-light that burned in colors she had no name for — a green that throbbed like a pulse, a blue so cold it looked like it should hurt."
7"There — moving fast along the far wall, glancing back, the medallion swinging."
8"Across the platform, Herrera reached a doorway hung with a curtain of green light and turned, and for one suspended instant their eyes met across the impossible room — his wide with something that was not quite fear, something closer to warning."
94.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1166
adjectiveStacks1
stackExamples
0"careful settled behind them."
adverbCount35
adverbRatio0.030017152658662092
lyAdverbCount6
lyAdverbRatio0.005145797598627788
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences76
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences76
mean16.25
std13.82
cv0.85
sampleLengths
020
129
226
32
432
515
63
79
85
94
103
1152
1219
134
1438
157
1612
179
1838
1926
207
2131
222
2335
244
2521
265
2747
2813
296
301
3115
323
333
3423
354
368
376
3859
392
402
4134
425
434
4423
4513
466
4737
4830
4912
74.12% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats7
diversityRatio0.5
totalSentences76
uniqueOpeners38
52.08% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount1
totalSentences64
matches
0"Then he was gone through"
ratio0.016
100.00% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount19
totalSentences64
matches
0"She knew the name now,"
1"He was fast, but she"
2"Her voice cracked against the"
3"He did not stop."
4"They never did."
5"Her boots slammed through a"
6"She knew those steps."
7"It hung open on a"
8"She stood at the edge"
9"They'd found his car."
10"They'd found his radio, his"
11"They had never found him."
12"She glanced down at the"
13"She hadn't told anyone where"
14"She kept her voice level,"
15"His grip tightened, and his"
16"She reached into her coat,"
17"His cat-bright eyes lifted to"
18"he said softly, releasing her"
ratio0.297
69.38% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount50
totalSentences64
matches
0"The rain came sideways, hammering"
1"Detective Harlow Quinn ran through"
2"She knew the name now,"
3"He was fast, but she"
4"Her voice cracked against the"
5"He did not stop."
6"They never did."
7"Her boots slammed through a"
8"Herrera vaulted a low railing"
9"She knew those steps."
10"Everyone in Camden walked past"
11"It hung open on a"
12"Quinn reached the top of"
13"Herrera's footsteps were already fading"
14"She stood at the edge"
15"They'd found his car."
16"They'd found his radio, his"
17"They had never found him."
18"The official report said *missing,"
19"She glanced down at the"
ratio0.781
78.13% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences64
matches
0"If she lost him now,"
ratio0.016
0.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences37
technicalSentenceCount9
matches
0"She knew the name now, knew the face — olive skin, dark curls flattened by the downpour, a Saint Christopher medallion that caught the streetlight when he glanc…"
1"Her boots slammed through a puddle deep enough to swallow her ankle, and she felt the cold bite straight up her shin, but she kept her arms pumping, kept her br…"
2"Faint music drifted up, threaded with voices, the murmur of a crowd that should not have existed in an abandoned station beneath a dead city street."
3"She stood at the edge with the rain drumming on her skull and her hand resting on the railing, and for the first time in a long while, Harlow Quinn hesitated."
4"They'd found his radio, his notebook, his wedding ring placed neatly on the dashboard as if he'd taken it off himself."
5"Stalls crowded the old platform beneath strings of lantern-light that burned in colors she had no name for — a green that throbbed like a pulse, a blue so cold …"
6"Figures moved among the stalls in cloaks and fine coats and a few in nothing she could parse as clothing at all, haggling over jars of luminous liquid, over fol…"
7"A boy, no older than twelve, with eyes that reflected the lantern-light like a cat's."
8"Across the platform, Herrera reached a doorway hung with a curtain of green light and turned, and for one suspended instant their eyes met across the impossible…"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags5
uselessAdditionCount0
matches(empty)
50.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags3
fancyCount1
fancyTags
0"she shouted (shout)"
dialogueSentences10
tagDensity0.3
leniency0.6
rawRatio0.333
effectiveRatio0.2
80.5435%