Run: 2026-07-09-01KX41J495556GWDFQ6Y5M49ZE

Run Details

Duration:
18.7s
Cost:
$0.018745
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 station had been abandoned for thirty-six years, but it still smelled of wet iron and electricity. Detective Harlow Quinn descended the tiled staircase with one hand resting near her holster and the other closing around the bone token in her coat pocket. The token was warm from her palm. It had been taken from a dead man in Soho six months earlier, catalogued as an unidentified fragment, and returned to her desk three days ago without explanation. Tonight, it had opened a door in the brickwork beneath Camden. That was not a fact she intended to put in her report. At the bottom of the stairs, a disused platform stretched away beneath a vaulted ceiling furred with soot. The old station signs had been painted over so many times that the layers had split into scales. Beyond the yellow line, rails vanished into black tunnels. Someone had strung lanterns between the pillars, their blue flames trembling without smoke. The market occupied the platform. Canvas awnings crowded the space where trains had once stopped. Tables displayed bottled lightning, silver knives, jars of dark powder, teeth set in velvet, and things Quinn had no intention of examining closely. Vendors watched her from beneath hoods and painted masks. None of them spoke. The silence had weight. It pressed against her shoulders with the same disciplined insistence as a briefing room full of senior officers. At the center of the market, beneath a clock that ran backward, a man lay dead beside a stall selling bottled memories. Eva Kowalski stood over him, one hand tucked into the curls behind her left ear. Her round glasses had slipped down her nose. A worn leather satchel hung from her shoulder, books bulging against the flap. “You came,” Eva said. “I said I would.” “You said you were going to arrest me.” “I said I was considering it.” “That’s practically an invitation from you.” Quinn looked past her. “Who found the body?” “Market security.” Eva nodded toward a tall figure in a black coat standing near the pillars. Its face was hidden behind a porcelain mask with no features except a vertical slit where the mouth should have been. “It won’t give a statement.” “Convenient.” “It doesn’t speak.” “More convenient.” Quinn crouched beside the corpse. The dead man was in his fifties, perhaps. Thin, gray-faced, dressed in a brown suit that belonged to another decade. A narrow wound punctured his throat. No blood stained the collar. His right hand was clenched around a scrap of blue paper, and his left rested palm-up on the platform tiles. There was a burn mark in the center of it. Quinn studied the body without touching it. Her military posture remained even in a crouch: spine straight, knees balanced, attention divided between the corpse and every moving shadow in the market. Eighteen years of police work had taught her that a crime scene was a conversation. The dead spoke first. The living usually lied. Eva lowered herself beside her. “His name is Oren Vale. Information broker. He sold routes through the Market, names of buyers, locations of breaches.” “Breaches?” “Portals. Rifts. Places where—” “I know what the word means.” “No, you know what the ordinary word means.” Quinn glanced at her. Eva’s green eyes were bright behind her glasses, frightened but intent. The girl had always been like that: afraid of the dark, unable to stop herself from opening the door. “Cause of death?” Quinn asked. “Stab wound,” said a man behind them. Quinn turned. A broad-shouldered constable stood at the edge of the lantern light, his uniform dark with rain. Constable Ames had come down with her from the surface. He had spent the descent muttering that the whole operation was an elaborate prank and had stopped speaking when one of the stalls offered him a jar containing a blinking human eye. Ames pointed at the wound. “Looks straightforward. Someone caught him here, put a blade through the throat, took what they wanted, and left.” “Then why is there no blood?” Quinn asked. He frowned. “Cold environment?” “It’s twenty degrees down here.” “Some kind of clotting agent.” “On the collar, the shirt, the tiles, the body?” Ames looked again. The wound was clean. Too clean. The flesh around it had a blackened edge, as if the blade had been heated. Quinn leaned closer. There were no puncture marks in the fabric except the one at the throat. No spray on the nearest pillar. No droplets beneath the body. The dead man had not bled here. She drew a penlight from her pocket and examined the floor. Dust lay thick along the platform’s edges, untouched except for a trail of footprints leading from the nearest stairwell. The prints were narrow, hard-soled, and sharply defined. They approached the body, stopped, and turned back. Ames saw them and brightened. “There. That’s our killer.” “No.” He looked wounded. “Detective—” “The prints are wrong.” “They look like footprints.” “They look like they were made for us to find.” Quinn pointed to the first print. “The dust is undisturbed around it. If someone walked through this much dirt, the edges would feather. These are stamped down cleanly, one by one. And look at the spacing.” The prints formed a perfect line, each heel exactly behind the toe of the previous one. No one walked like that unless they were balancing on a narrow beam. Ames squinted. “Could be a child.” “Then why are the impressions twenty-nine centimeters long?” Eva leaned in. “A ritual trail.” Ames gave a short laugh. “Of course it is.” Quinn ignored him. The prints stopped three feet from the body. There was no corresponding trail around the corpse, no scuffing from kneeling, no disturbance in the dust. Whoever had made them had never crossed the final distance. A staged approach, she thought. A path without a walker. She shifted her attention to the blue scrap in the victim’s hand. The paper was folded twice and held by stiffening fingers. She used tweezers from her kit to ease it free. One word had been written across it in silver ink. MORRIS. For a moment, the market receded. The blue lanterns blurred at the edges. Quinn saw rain on a windscreen, a shattered streetlamp, the empty side of the alley where her partner should have been. DS Morris had disappeared three years ago in the middle of an investigation. No body. No witnesses. No explanation that survived a second reading. Her thumb tightened around the tweezers. Eva watched her. “You know that name.” Quinn folded the paper. “A former colleague.” “Your partner.” “Where did you hear that?” “Oren told me he had information about Morris.” The answer landed with the weight of a dropped weapon. “You knew he was here?” “I knew he was supposed to meet someone. I didn’t know he would be dead.” “You brought me to a crime scene involving my missing partner.” “I brought you because I thought you’d want to know.” “That is not the same thing.” “No,” Eva said. “It isn’t.” The market muttered around them. A vendor lifted a brass bowl and poured a thread of blue fire into a bottle. Somewhere behind the stalls, something laughed with too many voices. Quinn turned back to the body. “What was Vale carrying?” Eva hesitated. “A satchel,” she said. “It’s gone.” “Wallet?” “Gone too.” “Phone?” “He didn’t have one.” “Anything else?” Eva looked toward the silent market security figure. “There was a compass.” Quinn’s gaze sharpened. “Describe it.” “Small brass casing. Green patina. Protective marks etched into the face. The needle points toward supernatural rifts.” Ames made a strangled noise. “A compass.” “Not an ordinary one,” Eva said. “There are no ordinary ones here,” Quinn replied. She took out her notebook and sketched the body’s position, the footprints, the lanterns, the stalls. Then she noticed the clock. It hung on the tiled wall above the corpse, its hands moving backward in jerks. The minute hand had just clicked from twenty-two to twenty-one. “What time was the body found?” she asked. Ames checked his notebook. “Twenty-three minutes past midnight.” “And your watch?” He glanced down. “Twelve twenty-three.” Quinn looked at her own worn leather watch. Twelve twenty-three. The second hand ticked steadily. The wall clock showed twelve nineteen. “Broken,” Ames said. “Possibly.” Eva’s attention moved to the clock. “The Market moves every full moon. Time behaves strangely when it’s close to a transition.” “Close to what?” “Moving.” Quinn stood. The corpse lay beneath the clock, but the position of the lanterns cast shadows toward the wrong side of the platform. She had noticed it on entering: the blue flames lit the market from the left, yet the shadows stretched right and slightly upward, as though the ground sloped toward the ceiling. She walked to the nearest pillar and held her penlight against the tiles. The beam bent. Not much. A slight wavering, like light through rising heat. But the station was cold, and the beam bent in a perfect arc around a patch of empty air. Quinn reached toward it. Eva caught her wrist. “Don’t.” Quinn looked at the hand gripping her. “Why?” “Because that is probably a rift.” “Probably?” “I’m trying to be reassuring.” Quinn pulled free. She took a step back and scanned the scene again. The dead man. The bloodless wound. The fake footprints. The message in her partner’s name. The missing compass. The evidence did not describe a murder committed in the market. It described a body delivered there. She crouched once more and examined Vale’s shoes. The soles were wet, but not with rain. A thin film of silver grit clung to the leather. She scraped some onto a glass evidence vial. The particles moved against the vial’s interior, gathering into a line that pointed toward the distorted air. Eva inhaled sharply. Quinn’s pulse remained steady. Her mind did not. “Where was he killed?” Ames asked. “Somewhere with water,” Quinn said. “Recently. The soles are wet, but the platform is dry. No splash marks. No transfer beneath the body.” “The Thames?” “Maybe. But the grit isn’t river silt.” Eva crouched beside her and peered at the vial. “Salt.” “Salt doesn’t move.” “That isn’t salt.” Quinn looked at the edge of Vale’s trouser cuff. A pale crust marked the fabric. It glittered like frost. “Sea water,” she said. Eva’s face tightened. “There are no seas near London.” “There are no portals under Camden either. Yet here we are.” The detective rose and approached the distorted patch of air. She did not touch it. The compass grit continued to creep across the vial, all of it leaning toward the invisible disturbance. Someone had carried Vale through a rift. Someone had brought him here alive or nearly alive, set him down, burned the wound into his throat, arranged the false trail, and placed the message in his hand. The killer wanted the Market to think the murder had happened inside its borders. More importantly, they wanted Quinn to find Morris’s name. A message, not a clue. A summons. “Detective,” Ames said quietly. At the far end of the platform, a vendor had begun packing up. He wore a red scarf and kept his head bowed. Quinn watched him slide a knife into a case, then glance at the dead man. “Stop,” she called. The vendor froze. Quinn crossed the market. Stalls shifted aside as she passed, owners suddenly fascinated by their merchandise. The vendor’s table held coils of wire, black candles, and a row of small brass objects. One space was empty. The dust around it was fresh. “Where is the compass?” Quinn asked. The vendor said nothing. Ames came up behind her. “Answer the detective.” The vendor’s hood lifted slightly. Beneath it, his eyes reflected no lantern light. Quinn placed her hand on the table. “Vale was killed somewhere else. You know where. You helped someone move him.” The vendor’s gaze flicked to the rift. Not fear. Recognition. Quinn caught his sleeve, but the cloth collapsed beneath her fingers. The coat was empty. A cold wind passed through it, smelling of deep water and rust. The vendor was already gone. On the table, one brass object remained. A compass. Small. Verdigrised. Its face was etched with protective sigils. The needle spun once, twice, and settled toward the distorted air beneath the clock. Quinn picked it up. The metal was warm. Across the platform, the wall clock stopped moving backward. Its hands snapped forward and pointed to twelve twenty-three. At the exact same instant, every lantern in the market went out. In the dark, something spoke in the dead man’s voice. “Ask what Morris found.” Then the rift opened.
created_at"2026-07-09T18:17:10.189Z" 7/9/2026, 6:17:10 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2967
moderation_latency(null)
generation_time18369
tokens_prompt923
tokens_completion3661
native_tokens_prompt835
native_tokens_completion2985
native_tokens_completion_images0
native_tokens_reasoning229
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"
usage0.018745
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_0fc452ee9dcd41ae016a4fe5a66f1c8193aa122fe1c80603ac"
is_byokfalse
latency452
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-1783621030-f7YaW6vraFP07niJftjh"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783621030-myZga7XTtlumu31zzM4e"
upstream_id"resp_0fc452ee9dcd41ae016a4fe5a66f1c8193aa122fe1c80603ac"
total_cost0.018745
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
adverbTagCount1
adverbTags
0"Ames said quietly [quietly]"
dialogueSentences92
tagDensity0.174
leniency0.348
rawRatio0.063
effectiveRatio0.022
88.16% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount2112
totalAiIsmAdverbs5
found
0
adverb"sharply"
count2
1
adverb"slightly"
count2
2
adverb"suddenly"
count1
highlights
0"sharply"
1"slightly"
2"suddenly"
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)
66.86% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount2112
totalAiIsms14
found
0
word"velvet"
count1
1
word"silence"
count1
2
word"weight"
count2
3
word"porcelain"
count1
4
word"perfect"
count2
5
word"shattered"
count1
6
word"etched"
count2
7
word"wavering"
count1
8
word"scanned"
count1
9
word"pulse"
count1
10
word"flicked"
count1
highlights
0"velvet"
1"silence"
2"weight"
3"porcelain"
4"perfect"
5"shattered"
6"etched"
7"wavering"
8"scanned"
9"pulse"
10"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
narrationSentences200
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount1
hedgeCount1
narrationSentences200
filterMatches
0"watch"
hedgeMatches
0"tended to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences275
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen32
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords2112
ratio0
matches(empty)
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions21
unquotedAttributions0
matches(empty)
52.85% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions70
wordCount1647
uniqueNames10
maxNameDensity1.94
worstName"Quinn"
maxWindowNameDensity3
worstWindowName"Quinn"
discoveredNames
Harlow1
Quinn32
Soho1
Camden1
Kowalski1
Ames12
Morris2
Eva16
Vale3
Market1
persons
0"Harlow"
1"Quinn"
2"Kowalski"
3"Ames"
4"Morris"
5"Eva"
6"Vale"
7"Market"
places
0"Soho"
globalScore0.529
windowScore0.667
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences110
glossingSentenceCount0
matches(empty)
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount2112
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences275
matches
0"muttering that the"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs153
mean13.8
std15.65
cv1.134
sampleLengths
017
172
212
358
45
568
622
736
84
94
108
116
126
138
1442
151
163
172
1856
1910
2054
2124
221
234
246
258
2634
275
287
2960
3023
318
324
335
345
359
3652
377
3846
399
401
414
424
434
4410
4536
4629
476
488
496
89.47% Passive voice overuse
Target: ≤2% passive sentences
passiveCount9
totalSentences200
matches
0"been abandoned"
1"been taken"
2"been painted"
3"was hidden"
4"was clenched"
5"been heated"
6"was folded"
7"been written"
8"was etched"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount1
totalVerbs273
matches
0"were balancing"
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount0
semicolonCount0
flaggedSentences0
totalSentences275
ratio0
matches(empty)
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1656
adjectiveStacks0
stackExamples(empty)
adverbCount54
adverbRatio0.03260869565217391
lyAdverbCount12
lyAdverbRatio0.007246376811594203
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences275
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences275
mean7.68
std6.03
cv0.785
sampleLengths
017
126
27
328
411
512
618
718
89
913
105
1110
1223
139
144
154
1618
1722
1815
198
2013
214
224
238
246
256
264
274
2816
2921
305
311
323
332
345
358
3612
376
385
3920
4010
417
4224
4315
444
454
465
4719
481
494
47.39% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats18
diversityRatio0.3236363636363636
totalSentences275
uniqueOpeners89
78.90% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount4
totalSentences169
matches
0"Somewhere behind the stalls, something"
1"Then she noticed the clock."
2"More importantly, they wanted Quinn"
3"Then the rift opened."
ratio0.024
100.00% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount28
totalSentences169
matches
0"It had been taken from"
1"It pressed against her shoulders"
2"Her round glasses had slipped"
3"Its face was hidden behind"
4"His right hand was clenched"
5"Her military posture remained even"
6"He had spent the descent"
7"She drew a penlight from"
8"They approached the body, stopped,"
9"He looked wounded."
10"She shifted her attention to"
11"She used tweezers from her"
12"Her thumb tightened around the"
13"She took out her notebook"
14"It hung on the tiled"
15"He glanced down."
16"She had noticed it on"
17"She walked to the nearest"
18"She took a step back"
19"It described a body delivered"
ratio0.166
45.80% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount140
totalSentences169
matches
0"The station had been abandoned"
1"Detective Harlow Quinn descended the"
2"The token was warm from"
3"It had been taken from"
4"Tonight, it had opened a"
5"That was not a fact"
6"The old station signs had"
7"Someone had strung lanterns between"
8"The market occupied the platform."
9"Canvas awnings crowded the space"
10"Tables displayed bottled lightning, silver"
11"Vendors watched her from beneath"
12"None of them spoke."
13"The silence had weight."
14"It pressed against her shoulders"
15"Eva Kowalski stood over him,"
16"Her round glasses had slipped"
17"A worn leather satchel hung"
18"Quinn looked past her."
19"Eva nodded toward a tall"
ratio0.828
29.59% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences169
matches
0"Whoever had made them had"
ratio0.006
100.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences68
technicalSentenceCount3
matches
0"At the center of the market, beneath a clock that ran backward, a man lay dead beside a stall selling bottled memories."
1"Thin, gray-faced, dressed in a brown suit that belonged to another decade."
2"She had noticed it on entering: the blue flames lit the market from the left, yet the shadows stretched right and slightly upward, as though the ground sloped t…"
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
totalTags15
fancyCount0
fancyTags(empty)
dialogueSentences92
tagDensity0.163
leniency0.326
rawRatio0
effectiveRatio0
89.9673%