Run: 2026-07-09-01KX40QJH9YTRXTEDP3CSGZ3T0

Run Details

Duration:
15.0s
Cost:
$0.015097
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 dead man lay beneath the old Camden station clock, where the hands had stopped at 2:17 and the tiled walls sweated black water. Detective Harlow Quinn stepped over the yellow cordon and felt the abandoned platform shift beneath her boots—not physically, but in the way a room seemed to recoil from being observed. The air tasted of rust, damp stone, and something medicinally bitter. Electric lamps had been strung between the pillars, their light shivering across the disused tracks. Beyond them, tunnels opened like unhealed wounds. Uniformed officers stood in a loose ring around the body. None spoke above a murmur. Quinn understood why. The place encouraged whispers. “Detective.” DS Len Mercer emerged from behind a pillar, rain shining on the shoulders of his coat. He was younger than Quinn by at least fifteen years and carried his uncertainty like a second badge. “Victim’s male, late thirties or early forties. No identification. No obvious weapon. We’ve got a witness.” “Where?” Mercer pointed toward a shuttered ticket kiosk. A woman sat on its counter, wrapped in a foil blanket. Curly red hair escaped around the edges of her round glasses. Her worn leather satchel rested between her shoes, bulging with books. Quinn’s gaze lingered on the satchel before returning to the body. “Cause?” “Not confirmed. Dr. Shah says blunt-force trauma may have killed him. There’s a fracture at the back of the skull.” Mercer lowered his voice. “But the scene’s strange.” “Strange is why we’re here.” He gave her a thin look. “You know what I mean.” Quinn did. The Metropolitan Police had no official category for a dead man found in an abandoned Tube station accessed through a locked maintenance hatch, surrounded by people carrying bone tokens and refusing to explain where they had come from. The unofficial category—unexplained, volatile, possibly connected to Morris—had followed her for three years. She pushed the thought aside. “Walk me through it.” Mercer glanced at his notes. “Victim was found at 02:17 by the witness. She says she heard an argument, then a crack like a gunshot. When she came out from the kiosk, he was already down. No one else on the platform.” “No one else now?” “No one else when uniforms arrived. There are three exits. One’s sealed by a collapsed tunnel. One leads to the maintenance corridor, and the door was locked from this side. The third is the station stairwell. Constable Rees was posted there.” “And?” “Rees saw nobody leave.” Quinn looked toward the stairwell. It rose into darkness beyond a steel gate. The padlock hung open, though its shackle was intact. “Who opened it?” Mercer hesitated. “No one admits to it.” “Convenient.” “The witness says the station changes.” Quinn turned to him. Mercer’s expression tightened. “She says the platforms aren’t always where they should be. Says this is a market.” “A market.” “The Veil Market.” He said the words as if they left a bad taste. “She claims people come here to buy things that don’t exist. Spells, poisons, information. She’s an assistant at the British Museum, apparently. Eva Kowalski.” Quinn studied the woman. Eva was pale beneath her freckles, one hand repeatedly tucking a curl behind her left ear. Her green eyes darted toward the body, then the tunnels, then the body again. “Did she see the killing?” “She says she saw the aftermath.” “So she isn’t a witness.” “She’s our only one.” Quinn walked to the corpse. The dead man wore a dark wool coat, expensive but soaked through at the hem. His right hand lay open, palm upward. A smear of blood marked two fingers. His left fist was clenched. Dr. Shah crouched nearby in white coveralls. “There’s a wound to the occipital bone. Could be a fall against the platform edge.” Quinn examined the tiles. The body lay a metre from the edge. No blood marked the lip, no scrape disturbed the dust between it and the corpse. “Could be,” she said. Shah nodded carefully. “Could be.” “Show me the wound.” The injury was a neat depression low on the skull, surrounded by a dark halo. Quinn had seen blunt-force trauma in alleyways, kitchens, bedrooms, pubs. This looked different. The skin had split, but there was almost no spray. The blood had seeped rather than struck. She glanced at the stopped clock. “Why is the clock stopped?” Mercer followed her gaze. “Old wiring. Station’s been dead for decades.” “Yet the lamps work.” “Portable generator.” “Clock’s mechanical.” “That’s not my area.” “Nothing here is, apparently.” She moved around the corpse. His shoes were clean. Too clean. The platform was coated in grey grit and oily damp. Every officer who had crossed the area had left tracks except the dead man. His soles held no residue. Quinn crouched. The right trouser cuff was wet, but the shoes were dry. She lifted her eyes to the rails. The tracks gleamed faintly beneath the lamps. A thin line of black water ran between them, flowing uphill. Quinn stared until the current vanished behind a pillar. “Detective?” Mercer said. “Who moved him?” “No one.” “His clothing says he was dragged through water. His shoes say he walked nowhere on this platform.” Mercer folded his arms. “Unless he was carried.” “Then there should be transfer marks. Fibres. Scuffs. Something.” “Could have been placed here.” “By whom?” “That is what we’re investigating.” Quinn stood. The movement brought her face-to-face with a brass token on the floor beside the body. It was small, irregular, and pale, with a hole punched through its centre. Bone. She did not touch it. “Evidence bag,” she said. Mercer called for one. Eva rose from the kiosk. “Don’t.” Her voice carried farther than it should have. The lamps flickered. Quinn turned. “Excuse me?” “That token isn’t his.” Eva hugged her satchel against her chest. “If you remove it, you may close the way out.” Mercer gave a humourless laugh. “The way out is a staircase.” Eva looked at him with open pity. “Not anymore.” Quinn walked toward her. Eva’s satchel was secured with two brass buckles, its leather dark with age. Several books pressed against the flap from within, one bound in cracked red hide. “You said you heard an argument,” Quinn said. “I heard someone shouting.” “What did he say?” “I couldn’t understand all of it.” “Try.” Eva tucked her hair behind her left ear. “He said, ‘You promised the door would hold.’ Then someone else said, ‘It was never a door.’” “Someone else?” “A woman.” “Description.” “Tall. Pale coat. I didn’t see her face.” “Where did she go?” Eva’s eyes moved toward the tunnel. Quinn followed the look. Nothing stirred beyond the pillars. Still, the sensation of being watched pressed against her skin. Mercer stepped closer. “Eva, you said the victim was alive when you saw him.” “Yes.” “But now you say you didn’t witness the attack.” “I saw him standing near the clock. Then the lights went out.” “They didn’t go out,” Mercer said. “We have continuous power from the generator.” “They went out for me.” Quinn watched Eva’s face. Fear, certainly. But not the messy fear of someone inventing a story. Eva was frightened of getting the details wrong. “Why were you here?” Quinn asked. Eva glanced at her satchel. “Research.” “At two in the morning?” “The Market moves on the full moon. It was the only opportunity.” Mercer snorted. “You expect us to believe that?” Eva looked past him to the clock. “It’s the full moon tonight.” Quinn checked her watch. The worn leather strap pressed cool against her left wrist. 2:23. The clock still read 2:17. Six minutes had passed. The second hand on her watch jerked backward. Quinn’s breath caught. Then it moved forward again. Mercer was speaking, but his words blurred beneath a distant sound: a train approaching through the sealed tunnel. The rails began to hum. Dust trembled loose from the ceiling. Every officer on the platform turned toward the darkness. “There are no trains,” Mercer said. Quinn ignored him. She went to the body’s clenched left hand and forced the fingers apart. A small brass compass rested in the palm. Its casing was mottled with verdigris. Protective sigils had been etched around the face, fine as scratches made by a needle. The compass needle spun once, twice, then stopped—not north, but toward the dead man. No. Not toward him. Toward the wound in his skull. Quinn lifted her head. The tunnel remained empty. Yet the needle quivered as if something beyond the wall had drawn a breath. “Detective,” Mercer said, “what is that?” “A compass.” “It’s pointing at the body.” “Not exactly.” She turned slowly, following the direction of the needle. It aimed past the corpse, past the clock, toward a section of tiled wall where an advertisement for a long-defunct theatre had peeled into strips. Quinn approached it. The poster’s faded woman in a feathered hat smiled over the words ONE NIGHT ONLY. Beneath the paper, the tiles were clean. No grime. No cracks. A narrow vertical line interrupted the grout. A door. She pressed her palm to the wall. The tiles were warm. Behind her, Eva whispered, “The door was never a door.” Quinn drew her service weapon. Mercer raised his own. “Harlow—” The wall opened inward without a sound. Beyond it lay a corridor lit by red lamps. Voices drifted through, dozens of them, bargaining and laughing. The smell of spices, hot metal, and wet earth rolled over the platform. The Veil Market. Quinn kept her pistol trained on the opening. At the far end of the corridor, a shadow moved. Tall. Pale coat. No visible face. The brass compass needle swung toward it. The shadow lifted one hand. On the dead man’s skull, the wound began to bleed again. Quinn understood then what the scene had been hiding. The blood had not dried because the killing had not happened at 2:17. The body had been pulled across a threshold between moments, deposited here after the blow, while the station’s clock had been forced to remember the time of death. And the killer had left through a door that was not a door. Mercer stared at the bleeding corpse. “What do we do?” Quinn’s grip tightened around her weapon. For three years she had believed Morris’s death was a failure of evidence, a case ruined by panic and bad light. Now, in the red glow beyond the wall, she saw the same wrongness: a body without footprints, a clock that lied, a wound that belonged to another place. The shadow stepped nearer. Quinn raised the gun. “We find out who came through,” she said, “and who they took with them.”
created_at"2026-07-09T18:02:40.05Z" 7/9/2026, 6:02:40 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency346
moderation_latency(null)
generation_time14146
tokens_prompt923
tokens_completion3024
native_tokens_prompt835
native_tokens_completion2377
native_tokens_completion_images0
native_tokens_reasoning0
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"
usage0.015097
router(null)
provider_responses
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endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_01f110db6d541c80016a4fe2401c088197bf6bf1eb3eaab02e"
is_byokfalse
latency203
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-1783620160-zetUjmPsLP4DN0QslTF7"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620160-NeQ9mx1ce6TUxKXllUCv"
upstream_id"resp_01f110db6d541c80016a4fe2401c088197bf6bf1eb3eaab02e"
total_cost0.015097
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
totalTags13
adverbTagCount0
adverbTags(empty)
dialogueSentences86
tagDensity0.151
leniency0.302
rawRatio0
effectiveRatio0
94.38% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1780
totalAiIsmAdverbs2
found
0
adverb"carefully"
count1
1
adverb"slowly"
count1
highlights
0"carefully"
1"slowly"
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)
80.34% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1780
totalAiIsms7
found
0
word"electric"
count1
1
word"aftermath"
count1
2
word"mechanical"
count1
3
word"flickered"
count1
4
word"trembled"
count1
5
word"etched"
count1
6
word"quivered"
count1
highlights
0"electric"
1"aftermath"
2"mechanical"
3"flickered"
4"trembled"
5"etched"
6"quivered"
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
narrationSentences163
matches(empty)
99.04% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount2
hedgeCount3
narrationSentences163
filterMatches
0"watch"
hedgeMatches
0"seemed to"
1"began to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences236
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen41
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1776
ratio0
matches(empty)
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions21
unquotedAttributions0
matches(empty)
0.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions73
wordCount1250
uniqueNames13
maxNameDensity2.4
worstName"Quinn"
maxWindowNameDensity5
worstWindowName"Eva"
discoveredNames
Camden1
Harlow1
Quinn30
Len1
Mercer19
Metropolitan1
Police1
Tube1
Morris2
Shah2
Eva12
Veil1
Market1
persons
0"Harlow"
1"Quinn"
2"Len"
3"Mercer"
4"Police"
5"Morris"
6"Shah"
7"Eva"
places(empty)
globalScore0.3
windowScore0
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences86
glossingSentenceCount0
matches(empty)
87.39% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches2
per1kWords1.126
wordCount1776
matches
0"not physically, but in the way a room seemed to recoil from being observed"
1"not north, but toward the dead man"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences236
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs146
mean12.16
std12.95
cv1.064
sampleLengths
024
163
215
37
41
550
61
740
811
91
1028
115
1211
1353
145
154
1642
174
1841
191
204
2122
223
237
241
256
264
2718
282
2938
3034
315
326
335
344
355
3634
3722
3827
394
405
414
4245
436
445
4511
464
472
482
494
92.35% Passive voice overuse
Target: ≤2% passive sentences
passiveCount6
totalSentences163
matches
0"was clenched"
1"was coated"
2"was frightened"
3"was mottled"
4"been etched"
5"been pulled"
6"been forced"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount1
totalVerbs218
matches
0"was speaking"
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount4
semicolonCount0
flaggedSentences3
totalSentences236
ratio0.013
matches
0"Detective Harlow Quinn stepped over the yellow cordon and felt the abandoned platform shift beneath her boots—not physically, but in the way a room seemed to recoil from being observed."
1"The unofficial category—unexplained, volatile, possibly connected to Morris—had followed her for three years."
2"The compass needle spun once, twice, then stopped—not north, but toward the dead man."
94.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1258
adjectiveStacks1
stackExamples
0"watched pressed against her"
adverbCount35
adverbRatio0.02782193958664547
lyAdverbCount11
lyAdverbRatio0.008744038155802861
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences236
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences236
mean7.53
std6.45
cv0.857
sampleLengths
024
130
211
315
47
510
65
73
84
91
1016
1118
1216
131
147
1511
1611
1711
1811
191
2024
214
225
236
245
252
2638
2713
285
294
305
3137
324
3341
341
354
365
378
389
393
402
415
421
436
444
453
4615
472
4814
4924
54.33% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats9
diversityRatio0.34893617021276596
totalSentences235
uniqueOpeners82
24.33% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount1
totalSentences137
matches
0"Then it moved forward again."
ratio0.007
100.00% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount22
totalSentences137
matches
0"He was younger than Quinn"
1"Her worn leather satchel rested"
2"He gave her a thin"
3"She pushed the thought aside."
4"It rose into darkness beyond"
5"He said the words as"
6"Her green eyes darted toward"
7"His right hand lay open,"
8"His left fist was clenched."
9"She glanced at the stopped"
10"She moved around the corpse."
11"His shoes were clean."
12"His soles held no residue."
13"She lifted her eyes to"
14"It was small, irregular, and"
15"She did not touch it."
16"Her voice carried farther than"
17"She went to the body’s"
18"Its casing was mottled with"
19"She turned slowly, following the"
ratio0.161
40.29% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount115
totalSentences137
matches
0"The dead man lay beneath"
1"Detective Harlow Quinn stepped over"
2"The air tasted of rust,"
3"None spoke above a murmur."
4"Quinn understood why."
5"The place encouraged whispers."
6"DS Len Mercer emerged from"
7"He was younger than Quinn"
8"Mercer pointed toward a shuttered"
9"A woman sat on its"
10"Her worn leather satchel rested"
11"Quinn’s gaze lingered on the"
12"Mercer lowered his voice"
13"He gave her a thin"
14"The Metropolitan Police had no"
15"The unofficial category—unexplained, volatile, possibly"
16"She pushed the thought aside."
17"Mercer glanced at his notes."
18"Quinn looked toward the stairwell."
19"It rose into darkness beyond"
ratio0.839
36.50% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences137
matches
0"Now, in the red glow"
ratio0.007
100.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences46
technicalSentenceCount1
matches
0"Now, in the red glow beyond the wall, she saw the same wrongness: a body without footprints, a clock that lied, a wound that belonged to another place."
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags13
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags11
fancyCount1
fancyTags
0"Behind her Eva whispered (whisper)"
dialogueSentences86
tagDensity0.128
leniency0.256
rawRatio0.091
effectiveRatio0.023
86.7645%