Run: 2026-07-09-01KX40Z8JZWJPFK0HMYCHHYTZS

Run Details

Duration:
19.9s
Cost:
$0.018493
Provider:
OpenAI

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="4414" name="Eva Kowalski" aliases="Eva, Evie" pronouns="she/her" species="Human" storyRole="Best Friend"> <eyeColor>green</eyeColor> <hair>curly red</hair> <height>5'4"</height> <age>26</age> <glasses>round glasses</glasses> <satchel>worn leather satchel full of books</satchel> <freckles>freckled complexion</freckles> <nervousHabit>tucking hair behind her left ear</nervousHabit> <description>Aurora's childhood friend and an occult researcher.</description> <backstory>Moved to London two years before Aurora and works as a research assistant at the British Museum's restricted archives. She holds a master's degree in Ancient History from Oxford.</backstory> </character> <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> <item id="2004" name="Veil Compass" aliases="the Compass, shadow compass" type="Tool" origin="The Veil Market"> <casingMaterial>small brass compass</casingMaterial> <faceMarkings>face etched with protective sigils</faceMarkings> <needle>points toward the nearest supernatural rift or portal</needle> <patina>casing has a patina of verdigris</patina> <creator>crafted by a Shade artisan</creator> <description>A compass attuned to supernatural energy.</description> </item> </codex> Write a fully fleshed out scene of at least 1000 words in the mystery genre. A detective arrives at a crime scene in an unusual location. Something is wrong — the evidence doesn't add up. A colleague is present, offering a different interpretation. Through careful observation and deduction, the detective begins to see what others have missed. 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 bone token was warm in Detective Harlow Quinn’s palm. That was the first thing wrong with the station. The second was the silence. Abandoned Tube stations were never silent. They groaned in their tunnels and settled beneath the weight of London. Water ticked through cracked tiles. Rats rustled behind advertisements for products nobody remembered buying. Even the dead air had a pressure to it, a low mechanical thrum that belonged to the buried city. This place had none of that. Quinn stood at the bottom of a tiled staircase, one hand resting on the butt of her service pistol, and listened to the silence press against her eardrums. Her torch beam cut across a platform sign whose letters had been scraped away. Beyond it, the station opened into a market. Not a metaphorical market. Stalls crowded the platform beneath patched awnings. Shelves displayed stoppered bottles full of green smoke, silver fish suspended in glass, bundles of black feathers tied with red thread. An old woman with antlers curling from her temples watched Quinn from behind a counter of carved teeth. A man with no visible face sat polishing a row of knives. They had all gone still. At the centre of the platform, beneath the dead station clock, lay a body. Quinn stepped forward. Her boots made no sound. That was the third thing wrong. She looked down. Dust filmed the concrete in a thin gray skin, undisturbed except for a trail of narrow footprints leading from the far tunnel to the body. One set in. None went out. The victim lay on his back, a young man in a dark wool coat, one hand flung toward the tracks. His throat had been cut. Blood soaked his collar and spread beneath his shoulders in a dark fan. A brass token, stamped with a skull split down the centre, rested beside his left hand. Quinn approached without crossing the footprints. “Don’t touch anything,” she said. Eva Kowalski emerged from between two stalls, clutching her worn leather satchel against her ribs. Her curly red hair had escaped its tie and haloed her freckled face. Round glasses magnified her green eyes, which were fixed on the corpse. “I haven’t,” Eva said. “You moved him?” “No.” “You called the police?” Eva tucked a strand of hair behind her left ear. “I sent word to the people who keep this place from collapsing into a riot. They sent word to you.” Quinn glanced at the gathered market-goers. “That isn’t an answer.” “It’s the only one you’re getting.” Eva had always been difficult when frightened. She had been twelve the first time Quinn met her, all elbows and copper curls, hiding behind her mother at a neighbour’s Christmas party. Twenty years later, fear still made her sharper rather than quieter. Quinn crouched near the body. She did not look at the throat first. Blood lied when people wanted it to. She examined the victim’s shoes, trouser cuffs, hands, face. No defensive wounds. No blood on his palms. No transfer marks on the fingers. The cut at the throat was clean and deep. A professional job, perhaps. But the blood had not behaved like blood. The pool beneath the corpse was thick at the edges, almost lacquered, and the fan reached uphill toward the station wall. Quinn set two fingers against the concrete. Dry. “Where’s the weapon?” she asked. Eva shook her head. Quinn looked at the footprints. “Who came through the tunnel?” “No one saw.” “There are prints.” “They appeared with him.” “People don’t appear.” Eva’s mouth tightened. “You’re standing in an underground market that moves locations every full moon. You have a bone token in your pocket because the front door won’t open for anyone without one. You saw a man with antlers ten minutes ago. Perhaps revise your position on what people do.” Quinn rose. “You’ve been spending too much time in restricted archives.” “I work in restricted archives because people like you keep insisting the evidence must fit inside a police report.” The old woman behind the tooth stall hissed. Her antlers cast branching shadows over her face. Quinn ignored her. “Who is he?” “Basil Rook. Information broker.” “Known criminal activity?” “Known activity,” Eva said. “The distinction matters.” “It usually does.” Quinn walked the perimeter of the body. The market had arranged itself around the killing with the grim efficiency of a theatre audience. No one had fled. No one had called for help. A ring of chalk marked the floor ten feet away, though the line was broken at the north side. Two candles burned on either side of the corpse, their flames standing perfectly upright despite the cold draft moving through the station. She checked her watch. The worn leather strap had softened with years against her left wrist. Its second hand ticked steadily. The station clock above her showed 2:17. Her watch showed 2:43. “Which time is correct?” she asked. Eva looked up. “Neither, probably.” “Probably isn’t useful.” “It’s a market clock.” “That means nothing.” “It means it measures transactions, not hours.” Quinn turned to her. Eva swallowed and tucked her hair behind her ear again. “The Veil Market changes location every full moon. Time behaves badly near the crossings. Sometimes a minute takes an hour. Sometimes the other way around.” “Then how long has the body been here?” “About twenty minutes.” “According to?” “Me.” “You found him?” “I heard the bell.” “What bell?” Eva pointed to the opposite end of the platform. A bronze bell hung from an iron frame, its clapper wrapped in white cloth. Quinn had not noticed it before. A smear of blood marked the cloth. “Basil was supposed to sell me a document,” Eva said. “He told me to meet him here at the third bell. I arrived after the second. Then the third rang, and he was lying there.” “Did you see anyone leave?” “No.” “Did you see anyone approach?” “No.” “Convenient.” Eva’s eyes flashed. “I didn’t kill him.” “I didn’t say you did.” “You didn’t have to.” Quinn looked back at the body. Basil Rook’s coat was expensive, though stained at the hem with a pale powder. His right hand was clenched around something black. She leaned closer. A thread. Not cloth. Not hair. It gleamed like wet coal and seemed to absorb the torchlight. “Bag that,” Quinn said. “I don’t have evidence bags.” “You have books.” Eva stared at her. “Paper,” Quinn said. “Clean paper.” Eva crouched, opened her satchel, and produced a small archival envelope. Quinn watched her use a pair of tweezers to lift the thread from the dead man’s hand. “Don’t crease it,” Eva murmured. “It’s evidence, not a first edition.” “It may be older than your country.” Quinn held out her hand. Eva placed the envelope in it. Something moved at the edge of Quinn’s vision. She snapped the torch toward the tunnel. Nothing. The footprints remained. They began at the black mouth of the tunnel and ended beside Basil Rook’s shoulder. Quinn studied them again. The soles were narrow and pointed, like dress shoes, but the toes faced the wrong direction. Whoever had made them had walked backward. She followed the trail without stepping on it. One print, two, three. The left heel was deeper each time. The right foot dragged. “Your murderer was injured,” she said. Eva came to stand beside her. “Or pretending to be.” “Blood trail?” “None.” “Then why drag the foot?” Eva peered at the floor. “That isn’t a footprint.” Quinn looked at her. “It’s an impression of a foot,” Eva said. “There’s a difference.” “You’re going to have to make it.” “The thing that made these wasn’t walking on the ground. It was pressing itself against the other side of something.” Quinn’s jaw tightened. “The other side of what?” Eva pointed to the wall. At first, Quinn saw only glazed tiles, blackened by age. Then her torch caught a thin vertical line between two rows. It ran from the platform to the ceiling, too straight to be a crack. Around it, the tiles had buckled inward. Frost silvered the grout. Quinn took the small brass compass from her coat pocket. She had bought it from a stall an hour earlier after the stall keeper refused to explain what it was. The casing was green with verdigris, its face etched with protective sigils. The needle had remained fixed north since she’d picked it up. Now it spun. Eva inhaled. “Where did you get that?” “Does it matter?” “It’s a Veil Compass.” “The seller called it a compass.” “It points toward the nearest supernatural rift or portal.” Quinn watched the needle shudder, then settle toward the wall. Three years earlier, DS Morris had vanished in a locked railway office with no exit, no weapon, and no explanation. Quinn had spent eighteen months trying to force the case into a shape the department could accept. A suspect. A motive. A door. She still dreamed of the office sometimes. Morris standing beside the filing cabinet, bloodless and calm, telling her not to follow the light under the door. She had never told anyone about the light. The needle pointed directly at the seam. “The portal opened here,” Eva said. “After the murder?” “Before, I’d say.” Quinn examined the blood again. The fan on the floor angled uphill toward the wall. The candles burned without flickering. The footprints ended at the body, but the killer had not crossed the space between the wall and the corpse. The evidence did not describe a man approaching Basil Rook. It described something reaching through. “Basil was standing here,” Quinn said. Eva followed her gaze to the chalk circle. “Probably.” “The circle is broken.” “On purpose?” Quinn moved around it. The gap faced the wall. A deliberate opening. “The killer didn’t enter the station,” Quinn said. “It came through the rift. Basil was inside the circle, or meant to be. The rift opened behind him. The weapon came through first.” “No weapon,” Eva said. “The wound is clean, but there’s no blade.” “Then it went back.” Eva’s face had gone pale. “That’s not how portals work.” “You just told me time behaved badly.” “That doesn’t mean every impossible thing is possible.” Quinn pressed the compass shut. The needle continued to tremble beneath the lid. A soft chime sounded. Everyone on the platform turned toward the bell. The white cloth around its clapper had begun to bleed. One red drop fell. Then another. Basil Rook’s corpse jerked. The market erupted. Stalls overturned. Glass shattered. Someone screamed in a language Quinn did not know. The antlered woman vanished beneath her counter. Quinn drew her pistol and stepped between Eva and the body. Basil’s eyes opened. They were full of darkness, not pupils but depth, as if his skull had become a window into a lightless room. His mouth stretched around the cut in his throat. “Not dead,” Eva whispered. Quinn aimed at his forehead. “Stay behind me.” Basil’s fingers clawed at the floor. Blood flowed backward from the pool, sliding over the concrete in thin red streams. It gathered beneath him, drawing itself toward the seam in the wall. The portal answered. Blackness peeled apart between the tiles. Something on the other side pressed close enough to show the shape of a hand. Five fingers. Too many joints. Quinn fired. The shot cracked through the station. The bullet struck Basil’s shoulder and spun him sideways. The hand withdrew. The seam snapped shut with a sound like a breath sucked through teeth. For one second, the station was silent again. Then the dead man laughed. It came from beneath the platform. Quinn kept the pistol trained on Basil, but her eyes went to the floor. The blood had stopped moving. The candles had gone out. On the wall, where the rift had been, a fresh mark gleamed in the tiles: three narrow lines crossed by a hooked fourth. A signature. Eva stared at it. “That wasn’t there before.” Quinn lowered the weapon by an inch. “You recognize it.” “I’ve seen it in the archives.” “Whose is it?” Eva’s hand rose to her hair, then stopped halfway. “Not whose. What.” The dead man’s laughter faded into the tunnels. Quinn looked at the black thread sealed in Eva’s envelope, then at the compass in her hand. Its needle had stopped pointing at the wall. It pointed down. Below the platform, something knocked once against the underside of the station. Quinn’s watch ticked on, precise and indifferent. From beneath her feet came a second knock. Eva’s voice dropped to a whisper. “Detective, we need to leave.” Quinn looked at the body, the backward footprints, the broken circle, and the mark that had appeared after the portal closed. Then the station lights flickered on, one by one, revealing a fresh trail of wet footprints climbing up from the tracks. They pointed toward her.
created_at"2026-07-09T18:06:52.011Z" 7/9/2026, 6:06:52 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2191
moderation_latency(null)
generation_time19073
tokens_prompt923
tokens_completion3792
native_tokens_prompt835
native_tokens_completion2943
native_tokens_completion_images0
native_tokens_reasoning170
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"completed"
service_tier"default"
usage0.018493
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_0e18ea3dbccb06c5016a4fe33c24e48197a763866a275b2186"
is_byokfalse
latency358
model_permaslug"openai/gpt-5.6-luna-20260709"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1783620412-6E2i3KUfAIAYspmxMtHh"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620412-RxPvWkkoS8AuF80rMl07"
upstream_id"resp_0e18ea3dbccb06c5016a4fe33c24e48197a763866a275b2186"
total_cost0.018493
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
100.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags16
adverbTagCount0
adverbTags(empty)
dialogueSentences94
tagDensity0.17
leniency0.34
rawRatio0
effectiveRatio0
97.67% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount2146
totalAiIsmAdverbs1
found
0
adverb"perfectly"
count1
highlights
0"perfectly"
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)
81.36% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount2146
totalAiIsms8
found
0
word"silence"
count2
1
word"weight"
count1
2
word"mechanical"
count1
3
word"etched"
count1
4
word"shattered"
count1
5
word"whisper"
count1
6
word"flickered"
count1
highlights
0"silence"
1"weight"
2"mechanical"
3"etched"
4"shattered"
5"whisper"
6"flickered"
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
narrationSentences209
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount3
hedgeCount1
narrationSentences209
filterMatches
0"watch"
hedgeMatches
0"seemed to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences287
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen47
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords2146
ratio0
matches(empty)
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions23
unquotedAttributions0
matches(empty)
16.67% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions99
wordCount1628
uniqueNames13
maxNameDensity2.58
worstName"Quinn"
maxWindowNameDensity4.5
worstWindowName"Quinn"
discoveredNames
Detective1
Harlow1
Quinn42
Tube1
London1
Eva31
Kowalski1
Christmas1
Rook4
Basil8
Morris2
One3
Blood3
persons
0"Harlow"
1"Quinn"
2"Eva"
3"Kowalski"
4"Rook"
5"Basil"
6"Morris"
7"One"
8"Blood"
places
0"Detective"
1"London"
globalScore0.21
windowScore0.167
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences116
glossingSentenceCount0
matches(empty)
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.466
wordCount2146
matches
0"not pupils but depth, as if his skull had become a window into a lightless"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences287
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs174
mean12.33
std14.03
cv1.138
sampleLengths
010
19
25
351
46
550
662
75
814
93
105
116
1234
1354
146
155
1640
174
183
191
204
2130
2210
236
2442
2529
2614
2742
288
295
304
3110
323
333
344
353
3650
3711
3819
3916
406
414
423
437
443
4574
4621
477
484
496
98.55% Passive voice overuse
Target: ≤2% passive sentences
passiveCount4
totalSentences209
matches
0"been scraped"
1"were fixed"
2"was broken"
3"was clenched"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount0
totalVerbs277
matches(empty)
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount0
semicolonCount0
flaggedSentences0
totalSentences287
ratio0
matches(empty)
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1629
adjectiveStacks0
stackExamples(empty)
adverbCount42
adverbRatio0.02578268876611418
lyAdverbCount5
lyAdverbRatio0.003069367710251688
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences287
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences287
mean7.48
std5.99
cv0.802
sampleLengths
010
19
25
36
412
55
69
719
86
928
1014
118
124
137
1421
1518
1612
175
1814
193
205
216
223
2325
243
253
2620
275
2813
2916
306
315
3215
3313
3412
354
363
371
384
3910
4020
416
424
436
447
4524
4611
475
488
497
43.38% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats19
diversityRatio0.28222996515679444
totalSentences287
uniqueOpeners81
94.16% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount5
totalSentences177
matches
0"Even the dead air had"
1"Then her torch caught a"
2"Too many joints."
3"Then the dead man laughed."
4"Then the station lights flickered"
ratio0.028
100.00% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount32
totalSentences177
matches
0"They groaned in their tunnels"
1"Her torch beam cut across"
2"They had all gone still."
3"Her boots made no sound."
4"She looked down."
5"His throat had been cut."
6"Her curly red hair had"
7"She had been twelve the"
8"She did not look at"
9"She examined the victim’s shoes,"
10"Her antlers cast branching shadows"
11"She checked her watch."
12"Its second hand ticked steadily."
13"Her watch showed 2:43."
14"His right hand was clenched"
15"She leaned closer."
16"It gleamed like wet coal"
17"She snapped the torch toward"
18"They began at the black"
19"She followed the trail without"
ratio0.181
44.75% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount147
totalSentences177
matches
0"The bone token was warm"
1"That was the first thing"
2"The second was the silence."
3"They groaned in their tunnels"
4"Water ticked through cracked tiles."
5"Rats rustled behind advertisements for"
6"This place had none of"
7"Quinn stood at the bottom"
8"Her torch beam cut across"
9"Stalls crowded the platform beneath"
10"Shelves displayed stoppered bottles full"
11"An old woman with antlers"
12"A man with no visible"
13"They had all gone still."
14"Quinn stepped forward."
15"Her boots made no sound."
16"That was the third thing"
17"She looked down."
18"Dust filmed the concrete in"
19"None went out."
ratio0.831
56.50% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount2
totalSentences177
matches
0"Whoever had made them had"
1"Now it spun."
ratio0.011
100.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences59
technicalSentenceCount2
matches
0"Even the dead air had a pressure to it, a low mechanical thrum that belonged to the buried city."
1"Two candles burned on either side of the corpse, their flames standing perfectly upright despite the cold draft moving through the station."
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags16
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags16
fancyCount2
fancyTags
0"Eva murmured (murmur)"
1"Eva whispered (whisper)"
dialogueSentences94
tagDensity0.17
leniency0.34
rawRatio0.125
effectiveRatio0.043
91.1010%