Run: 2026-07-09-01KX41EV35QJHNBPC6JPQQY1NR

Run Details

Duration:
13.1s
Cost:
$0.012498
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="4417" name="Tomás Herrera" aliases="Tommy, Tomás, Herrera" pronouns="he/him" species="Human" storyRole="Support"> <eyeColor>warm brown</eyeColor> <hair>short curly dark brown</hair> <height>5'10"</height> <age>29</age> <skinTone>olive skin</skinTone> <scar>scar running along his left forearm from a knife attack</scar> <medallion>Saint Christopher medallion around his neck</medallion> <birthplace>Seville, Spain</birthplace> <description>A former paramedic who provides off-the-books medical care for the clique.</description> <backstory>Born in Seville, Spain. He moved to London to work for the NHS but lost his license after administering unauthorized treatments to supernatural patients.</backstory> </character> <location id="854" name="The Raven's Nest" aliases="the Nest, Raven, Silas' bar" realm="Earth"> <signColor>distinctive green neon sign above the entrance</signColor> <secretRoom>hidden back room accessible through a bookshelf, used for clandestine meetings</secretRoom> <description>A dimly lit bar in Soho, London. The walls are covered with old maps and black-and-white photographs.</description> </location> <location id="856" name="The Veil Market" aliases="Veil Market, the Market, underground market" realm="Earth"> <currentLocation>abandoned Tube station beneath Camden</currentLocation> <entryRequirement>bone token</entryRequirement> <schedule>moves locations every full moon</schedule> <description>A hidden supernatural black market that sells enchanted goods, banned alchemical substances, and information.</description> </location> </codex> Write a fully fleshed out scene of at least 1000 words in the thriller genre. A detective is pursuing a suspect through rain-soaked city streets at night. The chase takes them from the street level down into an underground market. The detective must decide whether to follow the suspect into unfamiliar and potentially dangerous territory. Use the codex entries above as your world reference for characters and setting. Only include the prose of the scene without any markdown or commentary.

Model response

AI
Rain turned Soho into a smear of black glass and neon. Detective Harlow Quinn saw the suspect in fragments: a gray coat slipping between umbrellas, one pale hand gripping the strap of a canvas satchel, the flash of a narrow face beneath a soaked hood. Then the crowd closed again. “Stop!” Quinn shouted. Nobody stopped. London swallowed the command beneath bus brakes, laughter, and the hard hiss of tires on wet pavement. Quinn drove through the pedestrians with military precision, shoulder first, one hand pressed to the radio at her collar. Her left wrist snapped up as she glanced at her watch. Eleven forty-three. She had been following the suspect for nine minutes, long enough to know the man was trained to use crowds and long enough to know he was frightened. Frightened people made mistakes. The suspect made one now. He cut across the mouth of an alley beside a shuttered tailor’s shop. Quinn saw his reflection in a puddle before she saw him directly: hood, gray coat, satchel clutched tight against his ribs. She lunged into the alley. Brick walls rose on either side, wet and shining. Rain poured from fire escapes in silver ropes. The suspect glanced back. His eyes caught the green neon glow spilling from the street behind them, and for one instant his face looked corpse-pale. Quinn ran harder. Her shoes struck the pavement. Her breath stayed even. Eighteen years in the Metropolitan Police had taught her how to spend fear without letting it spend her. She had chased burglars across rooftops, armed men through council estates, and a murderer into a burning warehouse. The body remembered what the mind wanted to forget. Three years ago, DS Morris had run ahead of her into a service tunnel beneath King’s Cross. He had never come back. The investigation had found no body, no weapon, no credible explanation. Quinn had found a smear of blood on a wall and a row of footprints that ended in dry concrete. She had spent three years turning every impossible detail into evidence she could hold. The suspect vaulted a stack of plastic crates. Quinn vaulted after him. He burst out onto a broader street, skidded on the slick pavement, and nearly collided with a black cab. The driver leaned on the horn. The suspect recovered and bolted toward an old pub wedged between a pawnshop and a boarded-up theater. Above its entrance, a distinctive green neon sign buzzed through the rain. The Raven’s Nest. Quinn knew the place. Everyone in Soho knew it, though not everyone admitted to having been inside. Dim bar. Bad whiskey. Walls covered in old maps and black-and-white photographs. The sort of place where people spoke softly and left through different doors. She had been watching it for six weeks. The suspect shoved through the entrance. Quinn followed. Warmth and stale beer struck her first. Then the noise: low conversation, clinking glass, a record playing somewhere behind the bar. Faces turned toward her and turned away again with practiced indifference. The suspect was already halfway across the room. “Police,” Quinn called. “Don’t make this worse.” A broad-shouldered bartender looked up from polishing a glass. Silas, if the reports were right. His gaze flicked to Quinn’s badge, then past her to the fleeing man. The suspect reached a bookshelf at the rear wall. Quinn saw his hand disappear between two old volumes. The bookshelf swung inward. He slipped through. By the time Quinn reached it, the panel had closed. She shoved against the books. Nothing moved. Her fingers swept the spines: London A to Z, a Bible, a history of maritime disasters. She pulled the Bible. The shelf clicked. Behind her, the bar had gone quiet. “Detective,” Silas said. Quinn looked over her shoulder. “Stay where you are.” “I wasn’t planning to move.” She opened the hidden door. A narrow stairwell dropped into darkness. Rainwater ran from the suspect’s shoes down the first steps. Quinn drew her weapon, checked the chamber by touch, and started down. The door shut behind her with a soft, final sound. The smell changed as she descended. Beer and damp wood gave way to wet stone, rust, and something sharp and medicinal. Somewhere below, machinery groaned. Quinn’s radio spat a burst of static and went dead. She paused. Morris had vanished beneath King’s Cross after his radio had failed. The memory pressed close, but she forced it back. One step. Then another. At the bottom, the passage opened into an abandoned Tube station. Old tiles glimmered beneath a skin of moisture. Cracked signs pointed toward platforms that no longer existed. Gas lamps burned along the walls, though none had wires. The air thrummed with murmured voices and the faint metallic chime of unseen bells. People moved through the station in hooded coats and masks. A woman with antlers braided into her black hair haggled over a jar of blue powder. A man whose shadow moved independently of him displayed silver knives beneath a velvet cloth. Crates bore labels in languages Quinn didn’t recognize. The Veil Market. She had heard the name in fragments during raids and interviews. A hidden supernatural black market beneath Camden, shifting locations every full moon. Enchanted goods. Banned alchemical substances. Information. Rubbish, she had told herself. Now a child with glassy golden eyes stared at her from beside a stall of bottled lightning. The suspect pushed through the market, knocking over a display of black candles. He looked back and saw Quinn at the top of the platform stairs. His fear became terror. He ran. Quinn followed, but the market turned against her at once. Stalls shifted into her path. A vendor seized her sleeve and hissed something in a language that made her teeth ache. She tore free. Someone threw a handful of silver dust. It struck the tiles and flared blue. The suspect vanished into the crowd. Quinn reached the center of the platform and stopped. A tunnel opened ahead, its mouth framed by old brick. The suspect stood at the far end, perhaps thirty yards away, clutching the satchel. Between them, the market churned. At the tunnel entrance, a woman waited. She was tall, pale, and dressed in a black coat without a single drop of rain on it. She held a bone token between two fingers. The token glowed faintly, like moonlight trapped inside ivory. Quinn raised her weapon. “Police. Put the bag down.” The woman smiled. The smile showed too many teeth. The suspect said something to her. The woman answered without looking away from Quinn. Then she stepped into the tunnel. The suspect followed. Quinn’s instincts divided cleanly. The first said pursue. The second said wait for backup, though backup could not hear her and had no idea where she was. The third—quieter, older, shaped by Morris’s disappearance—said that tunnels were where evidence stopped being evidence and became a story people told themselves. Her watch ticked against her wrist. Eleven fifty-one. The market’s lamps flickered. A voice behind her whispered, “You have no token.” Quinn turned. A bent old man stood beside a stall crowded with bones, keys, and teeth. His eyes were milk-white. “No,” Quinn said. “Then the Market has no obligation to let you leave.” She kept her gun trained on him. “I’m not asking permission.” The old man laughed softly. Around them, the market had gone still. Faces watched from beneath hoods. The antlered woman. The child with golden eyes. The man with the restless shadow. All of them waiting to see whether the human detective would step into the dark. Quinn thought of Morris again—not the impossible tunnel, but the ordinary moments before it. His terrible coffee. His habit of humming when he read reports. The way he had once told her that fear was useful only if it pointed somewhere. The suspect had pointed. Into the tunnel. Quinn lowered her weapon just enough to move and strode toward the entrance. The air grew colder with every step. Behind her, the market’s voices resumed, subdued and eager. She crossed beneath the brick arch. The darkness swallowed the station. For three paces, she heard only her own breathing. On the fourth, something scraped along the wall beside her. Quinn spun, weapon raised. Nothing. Then a man’s voice came from farther down the tunnel. “Detective Quinn?” Her blood went cold. It was Morris’s voice. Not similar. Not remembered incorrectly. Morris’s exact voice, worn thin by distance and three years underground. Quinn’s finger settled against the trigger. Ahead, the suspect’s hooded silhouette waited beside a dim red light. The satchel hung open in his hand. Inside lay a scatter of objects: a silver badge, a bloodstained notebook, and a police radio emitting a faint hiss of static. Quinn recognized the radio. She had signed it out to DS Morris on the night he disappeared. The suspect backed away. “Don’t listen to him,” he whispered. From the darkness behind Quinn, Morris called again. “Harlow. Don’t follow.” She stood between the voice she had spent three years hunting and the suspect she had chased into a market that should not exist. The tunnel breathed around her. Quinn tightened her grip on the gun and took one step forward.
created_at"2026-07-09T18:15:22.481Z" 7/9/2026, 6:15:22 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency422
moderation_latency(null)
generation_time12527
tokens_prompt914
tokens_completion2502
native_tokens_prompt810
native_tokens_completion1948
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"
usage0.012498
router(null)
provider_responses
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endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_0bb536d397592037016a4fe53a906c8193b8ce17cb6b32daa1"
is_byokfalse
latency301
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-1783620922-gR1tnTNkgYcr0LCNvjWX"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620922-0gQKn7sDfkzt9bevIUy6"
upstream_id"resp_0bb536d397592037016a4fe53a906c8193b8ce17cb6b32daa1"
total_cost0.012498
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
totalTags6
adverbTagCount0
adverbTags(empty)
dialogueSentences14
tagDensity0.429
leniency0.857
rawRatio0
effectiveRatio0
93.50% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1539
totalAiIsmAdverbs2
found
0
adverb"softly"
count2
highlights
0"softly"
100.00% AI-ism character names
Target: 0 AI-default names (17 tracked, −20% each)
codexExemptions(empty)
found(empty)
100.00% AI-ism location names
Target: 0 AI-default location names (33 tracked, −20% each)
codexExemptions(empty)
found(empty)
83.76% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1539
totalAiIsms5
found
0
word"warmth"
count1
1
word"flicked"
count1
2
word"velvet"
count1
3
word"churned"
count1
4
word"flickered"
count1
highlights
0"warmth"
1"flicked"
2"velvet"
3"churned"
4"flickered"
100.00% Cliché density
Target: ≤1 cliche(s) per 800-word window
totalCliches1
maxInWindow1
found
0
label"blood ran cold"
count1
highlights
0"blood went cold"
100.00% Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells0
narrationSentences177
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount2
hedgeCount0
narrationSentences177
filterMatches
0"watch"
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences185
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen34
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1536
ratio0
matches(empty)
93.75% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions8
unquotedAttributions1
matches
0"From the darkness behind Quinn, Morris called again."
42.40% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions59
wordCount1487
uniqueNames16
maxNameDensity2.15
worstName"Quinn"
maxWindowNameDensity3.5
worstWindowName"Quinn"
discoveredNames
Soho2
Harlow1
Quinn32
Metropolitan1
Police1
Morris8
King2
Cross2
Raven1
Nest1
London2
Bible2
Tube1
Veil1
Market1
Camden1
persons
0"Harlow"
1"Quinn"
2"Police"
3"Morris"
4"King"
5"Cross"
6"Raven"
7"Market"
8"Camden"
places
0"Soho"
1"Metropolitan"
2"London"
globalScore0.424
windowScore0.5
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences106
glossingSentenceCount0
matches(empty)
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.651
wordCount1536
matches
0"not the impossible tunnel, but the ordinary moments before it"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences185
matches
0"said that tunnels"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs103
mean14.91
std14.87
cv0.997
sampleLengths
011
139
23
319
460
54
65
734
85
942
103
1154
1217
135
1445
158
164
1742
1812
193
2042
218
226
232
2432
258
267
2728
289
299
304
313
3240
337
343
359
365
375
386
3922
4010
4135
422
4311
4413
4511
4641
4749
483
4929
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount1
totalSentences177
matches
0"was trained"
1"was frightened"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount0
totalVerbs260
matches(empty)
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount3
semicolonCount0
flaggedSentences2
totalSentences185
ratio0.011
matches
0"The third—quieter, older, shaped by Morris’s disappearance—said that tunnels were where evidence stopped being evidence and became a story people told themselves."
1"Quinn thought of Morris again—not the impossible tunnel, but the ordinary moments before it."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1498
adjectiveStacks0
stackExamples(empty)
adverbCount43
adverbRatio0.02870493991989319
lyAdverbCount10
lyAdverbRatio0.006675567423230975
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences185
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences185
mean8.3
std5.64
cv0.679
sampleLengths
011
134
25
33
42
517
619
711
82
928
104
115
1213
1321
145
159
168
174
1821
193
205
214
2218
2318
249
2517
265
2711
2820
2914
308
314
3219
336
3417
3512
363
374
3813
392
402
418
4213
438
446
452
467
4714
4811
498
49.55% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats15
diversityRatio0.34594594594594597
totalSentences185
uniqueOpeners64
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount5
totalSentences156
matches
0"Then the crowd closed again."
1"Then the noise: low conversation,"
2"Somewhere below, machinery groaned."
3"Then she stepped into the"
4"Then a man’s voice came"
ratio0.032
100.00% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount35
totalSentences156
matches
0"Her left wrist snapped up"
1"She had been following the"
2"He cut across the mouth"
3"She lunged into the alley."
4"His eyes caught the green"
5"Her shoes struck the pavement."
6"Her breath stayed even."
7"She had chased burglars across"
8"He had never come back."
9"She had spent three years"
10"He burst out onto a"
11"She had been watching it"
12"His gaze flicked to Quinn’s"
13"He slipped through."
14"She shoved against the books."
15"Her fingers swept the spines:"
16"She pulled the Bible."
17"She opened the hidden door."
18"She had heard the name"
19"He looked back and saw"
ratio0.224
59.36% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount125
totalSentences156
matches
0"Detective Harlow Quinn saw the"
1"London swallowed the command beneath"
2"Quinn drove through the pedestrians"
3"Her left wrist snapped up"
4"She had been following the"
5"The suspect made one now."
6"He cut across the mouth"
7"Quinn saw his reflection in"
8"She lunged into the alley."
9"Brick walls rose on either"
10"Rain poured from fire escapes"
11"The suspect glanced back."
12"His eyes caught the green"
13"Quinn ran harder."
14"Her shoes struck the pavement."
15"Her breath stayed even."
16"She had chased burglars across"
17"The body remembered what the"
18"He had never come back."
19"The investigation had found no"
ratio0.801
64.10% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount2
totalSentences156
matches
0"By the time Quinn reached"
1"Now a child with glassy"
ratio0.013
100.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences64
technicalSentenceCount2
matches
0"Quinn had found a smear of blood on a wall and a row of footprints that ended in dry concrete."
1"A vendor seized her sleeve and hissed something in a language that made her teeth ache."
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags6
uselessAdditionCount0
matches(empty)
0.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags6
fancyCount3
fancyTags
0"Quinn shouted (shout)"
1"behind her whispered (whisper)"
2"he whispered (whisper)"
dialogueSentences14
tagDensity0.429
leniency0.857
rawRatio0.5
effectiveRatio0.429
89.5473%