Run: 2026-07-09-01KX40M99TPE04NFBNC9JRHH87

Run Details

Duration:
18.1s
Cost:
$0.017191
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
Harlow Quinn ducked beneath the rusted station sign and entered the abandoned Tube station with one hand on the torch at her belt. The air changed below the stairs. Camden’s wet-night stink—diesel, beer, rain steaming off pavement—fell away behind her. In its place came cold iron, candle smoke, and the mineral reek of old tunnels. A row of electric bulbs hung from a cable overhead, each one burning with a weak blue flame. Her leather watch read 2:17 a.m. The station had no name on the surviving tiles. Someone had scraped it away, leaving a pale rectangular scar above the ticket hall. Beneath it, the old barriers had been dragged aside to make room for stalls. Velvet awnings sagged between the pillars. Shelves displayed stoppered bottles, black feathers, silver knives, teeth mounted on cards. A woman with antlers beneath her hood watched Harlow pass without blinking. The Veil Market moved locations every full moon. Tonight it had settled beneath Camden, in a station closed before Harlow was born and omitted from every current map. She had entered with a bone token clenched in her palm. She had not asked where it came from. At the bottom of the escalator, uniformed constable Pike stood beside a strip of yellow crime-scene tape. He looked young enough to be offended by his own moustache. The tape had been nailed to the tiled walls, though no one had touched it since Harlow arrived. “Detective,” he said. “Platform three.” “There are only two platforms.” “That’s what I thought.” “Then don’t call it three.” Pike glanced at the dark tunnel behind him. “It’s what the witnesses are calling it.” Harlow passed beneath the tape. Her closely cropped salt-and-pepper hair brushed the loose end. She disliked the place immediately, which was useful. Dislike sharpened the eye. The body lay in the middle of the platform. He was a narrow man in a plum-coloured coat, perhaps fifty, with a face the colour of candle wax. His throat had been opened from ear to ear. Blood covered his collar, his lapels, the pale grout between the tiles. A brass sign beside him read INFORMATIONS, though the final S had fallen long ago. No weapon lay nearby. No footprints crossed the blood. Pike followed her gaze. “Victim’s called Marius Venn. Ran one of the information stalls. Witnesses heard an argument at two minutes past midnight. Then the lights went out. When they came back, he was dead.” “Who found him?” “Several people. Nobody wants to give names.” “Of course they don’t.” A familiar voice came from the mouth of the tunnel. “Because half of them don’t have names to give.” Eva Kowalski stepped into the light, her worn leather satchel thumping against her hip. Her curly red hair had escaped its tie in several directions, and the blue bulbs caught in the lenses of her round glasses. Freckles scattered across her cheeks. She tucked a curl behind her left ear, then did it again. Harlow looked at her satchel. “You came prepared to identify the murderer or bury him?” “Both require books.” “You’re not police.” “No. That’s why people tell me things.” Eva crouched near the body, careful not to cross the blood. “The market’s calling it a killing by shadow.” “People call a lot of things by inaccurate names.” “Shadows don’t usually leave bodies.” “Neither do knives, if you remove them.” Eva looked up. Her green eyes were bright with the kind of interest Harlow associated with dangerous chemicals. “There’s no knife.” “That’s not the same as saying there wasn’t one.” Harlow knelt. The man’s coat was expensive but badly stained, with a dozen pockets sewn into its lining. A silver chain showed at his waist. The throat wound was clean and deep, but not clean enough for a knife. The edges were bruised, darkened as if the flesh had been burned from within. She held her torch close without touching him. The blood had spread beneath the body in a flat, even sheet. It reached the platform edge on both sides, but not the wall behind him. If Venn had been killed where he lay, the blood should have followed the slight slope of the tiles. Instead, it had pooled around his shoulders and hips as though poured from above. Harlow shifted her attention to his hands. The right hand was clenched. The fingernails were broken, but there was no skin beneath them. His left hand rested open, palm up. In it lay a small brass compass. The casing was green with verdigris. Protective sigils covered the face in fine, cramped lines. Its needle quivered, spun once, and settled—not north, but toward the black tunnel beyond platform three. Harlow frowned. “Evidence bag,” she said. Pike produced one. Eva made a soft noise. “Don’t.” Harlow glanced at her. “Why not?” “Because it isn’t pointing toward the killer.” “You know that how?” “Because it’s a Veil Compass. It points toward the nearest supernatural rift or portal.” The words would have sounded absurd in any other place. Here, with the blue lights trembling overhead and the far tunnel breathing a draught that smelled of wet stone, they sounded irritatingly precise. Harlow held out her hand. Pike took the compass from Venn’s palm with forceps and slid it into the bag. The needle turned through the plastic and pointed at the tunnel. “Supernatural rift,” Harlow said. “Portal,” Eva corrected. “Possibly.” “Possibly.” “Definitely not a murder weapon.” “I didn’t ask what it was.” “You were about to decide it was.” Harlow rose. Her knees clicked. She had been standing for eighteen years in rooms where everyone thought they were cleverer than the police. Most of them had been wrong. The ones who weren’t had usually been dead. She scanned the platform. The market had been closed around the crime scene, though no one had bothered to stop watching. Traders clustered behind their stalls: a pale boy with black eyes; a woman wearing a necklace of tiny keys; two men who looked identical down to the scars on their chins. At the far end, a shuttered kiosk bore the painted words LOST PROPERTY. Beneath it, the tiles were clean. Too clean. “Pike,” she said. “Who moved the body?” “No one.” “Who touched it?” “No one.” “Who touched the compass?” He hesitated. “The witnesses. They said it appeared after the lights came back.” Harlow looked at the blood again. “Appeared?” “That’s the word.” Eva stood beside her. “The compass wasn’t there before the blackout.” “And everyone agrees?” “Everyone who was willing to talk.” “Which means no one.” Eva tucked her hair behind her ear. “You’re thinking the compass was planted after the murder.” “I’m thinking someone wants us to think the murder happened during the blackout.” Pike frowned. “The lights were out for three minutes.” “Two minutes,” said a voice from behind the stalls. A woman stepped forward. She was dressed in a grey suit and carried a handbag made from something that seemed to breathe. “Two minutes and eleven seconds.” Harlow studied her. “You saw the whole thing?” “I saw the lamps fail. I did not see the murder.” “Name?” The woman smiled without warmth. “Not tonight.” Pike reached for his notebook. Harlow stopped him with two fingers. The witness had stepped across the boundary of the blood without leaving a mark. Her shoes were dry. Her reflection in the dark window behind her was delayed by half a second. Harlow felt an old pressure tighten behind her ribs. Three years earlier, DS Morris had vanished in a locked room during a case involving a string of impossible burglaries. The official explanation had been an unstable floor, a panicked suspect, and an unfortunate fall. Harlow had never believed it. She still remembered the room afterward: dust undisturbed, door bolted from inside, Morris’s wedding ring lying six feet from where his hand should have been. This station smelled like that room. She turned back to the body. “Pike, where was Venn standing before the lights went out?” “By his stall, according to the witnesses.” “Which stall?” He pointed to the far side of the platform. A velvet canopy had been pulled down over a table crowded with rolled maps and sealed envelopes. Harlow walked there. The blood on Venn’s coat was thickest at the throat, but the back of his coat was clean. If his body had been carried, there should have been smears. If he had fallen, there should have been a trail. If he had bled out standing, the front of his trousers and shoes would have been soaked. His shoes were clean. She looked at the tiles between the stall and the body. Then at the canopy. One of its ropes had been cut. The loose end rested on the table, still wet. Not with blood. With water. Harlow lifted her torch. A line of droplets led from the stall to the platform edge, each bead perfectly round. They stopped at the place where the blood began. “Eva.” Eva came closer. “What?” “What happens when a portal opens?” Eva’s expression shifted. Interest gave way to caution. “That depends where it opens.” “Answer the question.” “Air pressure changes. Temperature drops. Sometimes water condenses. Sometimes objects pass through.” “People?” “Yes.” Harlow looked at the corpse. Venn’s shoes. The blood. The missing weapon. The compass needle fixed toward the tunnel. “The body didn’t fall here,” she said. Eva’s gaze followed hers. “It came through.” Pike gave a short, nervous laugh. “Came through what?” Harlow ignored him. She reached beneath the canopy and found a dark smear on the underside of the table. Not blood. Soot, arranged in a rough oval. Within it, the wood had split into a narrow black seam. The seam was no wider than a hair. The Veil Compass twitched inside its evidence bag. Then the lights went out. Pike swore. Someone screamed from the market. Metal shutters slammed down along the platform with a sound like gunfire. Harlow drew her service weapon and stepped between Eva and the body. In the dark, the tunnel breathed. A wet scrape came from beneath the table. “Don’t move,” Harlow said. “I wasn’t planning to,” Eva whispered. The scrape came again, closer. Something slid across the tiles. Harlow aimed her torch at the sound and clicked it on. The beam found a hand. It protruded from the black seam beneath the table, pale fingers clawing at the floor. A second hand followed. Then a face pushed through, distorted as if seen beneath deep water. The dead man’s face. Venn’s corpse remained on the platform, throat cut and eyes shut. The thing beneath the table opened its eyes. Harlow’s finger tightened on the trigger. Eva seized her wrist. “Wait.” The creature dragged itself halfway through. Its plum coat was torn, and its throat was whole. Around its neck hung a thin silver chain. At the end of it swung a small brass key. Harlow remembered the bloodless shoes. The clean back of the coat. The body placed after the fact. Two Venns. Or one man divided by a door. The creature looked at Harlow and mouthed a word. Morris. The lights returned. The seam beneath the table was gone. The hand, the face, the second Venn—all gone. But the compass needle no longer pointed toward the tunnel. It pointed at Eva. Eva had gone very still. Her hand hovered near the satchel, and her green eyes reflected the brass face through the plastic evidence bag. Harlow turned the gun toward her. Across the platform, the first corpse smiled. Only a little. Just enough to show that his throat had never been cut at all.
created_at"2026-07-09T18:00:52.291Z" 7/9/2026, 6:00:52 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2596
moderation_latency(null)
generation_time17738
tokens_prompt923
tokens_completion3339
native_tokens_prompt835
native_tokens_completion2726
native_tokens_completion_images0
native_tokens_reasoning204
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"
usage0.017191
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_09a7ecae8a30bdd2016a4fe1d4682481969c37fc0767fd0bc8"
is_byokfalse
latency360
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-1783620052-5tjrU1ksJt8kOroEEyw2"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620052-2NSPK9ajLtOLJR4KZ5vr"
upstream_id"resp_09a7ecae8a30bdd2016a4fe1d4682481969c37fc0767fd0bc8"
total_cost0.017191
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
totalTags8
adverbTagCount0
adverbTags(empty)
dialogueSentences73
tagDensity0.11
leniency0.219
rawRatio0
effectiveRatio0
94.85% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1942
totalAiIsmAdverbs2
found
0
adverb"perfectly"
count1
1
adverb"very"
count1
highlights
0"perfectly"
1"very"
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)
81.98% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1942
totalAiIsms7
found
0
word"electric"
count1
1
word"velvet"
count2
2
word"familiar"
count1
3
word"quivered"
count1
4
word"scanned"
count1
5
word"warmth"
count1
highlights
0"electric"
1"velvet"
2"familiar"
3"quivered"
4"scanned"
5"warmth"
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
narrationSentences184
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount1
hedgeCount1
narrationSentences184
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)
analyzedSentences248
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen31
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1938
ratio0
matches(empty)
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions20
unquotedAttributions0
matches(empty)
54.46% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions73
wordCount1570
uniqueNames13
maxNameDensity1.91
worstName"Harlow"
maxWindowNameDensity3
worstWindowName"Harlow"
discoveredNames
Quinn1
Tube1
Harlow30
Veil2
Market1
Camden2
Pike9
Kowalski1
Venn6
Eva15
Morris3
Compass1
Venns1
persons
0"Quinn"
1"Harlow"
2"Market"
3"Camden"
4"Pike"
5"Kowalski"
6"Venn"
7"Eva"
8"Morris"
9"Compass"
places(empty)
globalScore0.545
windowScore0.667
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences116
glossingSentenceCount2
matches
0"something that seemed to breathe"
1"smelled like that room"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.516
wordCount1938
matches
0"not north, but toward the black tunnel beyond platform three"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences248
matches
0"show that his"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs139
mean13.94
std15.09
cv1.082
sampleLengths
023
150
26
367
428
519
646
75
85
94
105
1115
1226
139
1455
154
165
1735
183
197
204
2119
2254
2315
243
253
267
2719
289
295
307
3121
329
3353
348
3559
367
3730
3831
392
404
413
426
436
447
454
4614
4733
4831
494
78.57% Passive voice overuse
Target: ≤2% passive sentences
passiveCount14
totalSentences184
matches
0"been dragged"
1"been nailed"
2"been opened"
3"been burned"
4"been killed"
5"was clenched"
6"been closed"
7"was dressed"
8"was delayed"
9"been pulled"
10"been carried"
11"been soaked"
12"was torn"
13"was gone"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount0
totalVerbs252
matches(empty)
96.77% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount4
semicolonCount2
flaggedSentences4
totalSentences248
ratio0.016
matches
0"Camden’s wet-night stink—diesel, beer, rain steaming off pavement—fell away behind her."
1"Its needle quivered, spun once, and settled—not north, but toward the black tunnel beyond platform three."
2"Traders clustered behind their stalls: a pale boy with black eyes; a woman wearing a necklace of tiny keys; two men who looked identical down to the scars on their chins."
3"The hand, the face, the second Venn—all gone."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1579
adjectiveStacks0
stackExamples(empty)
adverbCount35
adverbRatio0.022165927802406588
lyAdverbCount8
lyAdverbRatio0.00506649778340722
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences248
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences248
mean7.81
std5.44
cv0.696
sampleLengths
023
16
211
315
418
56
69
714
814
96
1012
1112
128
1320
1411
158
1617
1711
1818
193
202
215
224
235
248
257
265
279
288
294
309
3119
329
3312
3415
354
365
374
3831
393
407
414
4210
439
4414
4523
465
4712
485
4910
50.27% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats17
diversityRatio0.34274193548387094
totalSentences248
uniqueOpeners85
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount6
totalSentences163
matches
0"Instead, it had pooled around"
1"Then at the canopy."
2"Then the lights went out."
3"Then a face pushed through,"
4"Only a little."
5"Just enough to show that"
ratio0.037
100.00% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount32
totalSentences163
matches
0"Her leather watch read 2:17"
1"She had entered with a"
2"She had not asked where"
3"He looked young enough to"
4"Her closely cropped salt-and-pepper hair"
5"She disliked the place immediately,"
6"He was a narrow man"
7"His throat had been opened"
8"Her curly red hair had"
9"She tucked a curl behind"
10"Her green eyes were bright"
11"She held her torch close"
12"It reached the platform edge"
13"His left hand rested open,"
14"Its needle quivered, spun once,"
15"Her knees clicked."
16"She had been standing for"
17"She scanned the platform."
18"She was dressed in a"
19"Her shoes were dry."
ratio0.196
55.09% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount132
totalSentences163
matches
0"Harlow Quinn ducked beneath the"
1"The air changed below the"
2"Camden’s wet-night stink—diesel, beer, rain"
3"A row of electric bulbs"
4"Her leather watch read 2:17"
5"The station had no name"
6"Someone had scraped it away,"
7"Velvet awnings sagged between the"
8"Shelves displayed stoppered bottles, black"
9"A woman with antlers beneath"
10"The Veil Market moved locations"
11"Tonight it had settled beneath"
12"She had entered with a"
13"She had not asked where"
14"He looked young enough to"
15"The tape had been nailed"
16"Pike glanced at the dark"
17"Harlow passed beneath the tape."
18"Her closely cropped salt-and-pepper hair"
19"She disliked the place immediately,"
ratio0.81
100.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount4
totalSentences163
matches
0"If Venn had been killed"
1"If his body had been"
2"If he had fallen, there"
3"If he had bled out"
ratio0.025
100.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences66
technicalSentenceCount2
matches
0"Here, with the blue lights trembling overhead and the far tunnel breathing a draught that smelled of wet stone, they sounded irritatingly precise."
1"Traders clustered behind their stalls: a pale boy with black eyes; a woman wearing a necklace of tiny keys; two men who looked identical down to the scars on th…"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags8
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags8
fancyCount2
fancyTags
0"Eva corrected (correct)"
1"Eva whispered (whisper)"
dialogueSentences73
tagDensity0.11
leniency0.219
rawRatio0.25
effectiveRatio0.055
93.7329%