Run: 2026-07-09-01KX41A6A9NC16Q699JXWPRZ6R

Run Details

Duration:
18.5s
Cost:
$0.017173
Provider:
OpenAI

Model input

System
You are an expert fiction writer. Always keep the following rules in mind: - Write in past tense and use General English spelling, grammar, and colloquialisms/slang. - Write in active voice - Always follow the "show, don't tell" principle. - Avoid adverbs and cliches and overused/commonly used phrases. Aim for fresh and original descriptions. - Convey events and story through dialogue. - Mix short, punchy sentences with long, descriptive ones. Drop fill words to add variety. - Skip "he/she said said" dialogue tags and convey people's actions or face expressions through their speech - Avoid mushy dialog and descriptions, have dialogue always continue the action, never stall or add unnecessary fluff. Vary the descriptions to not repeat yourself. - Put dialogue on its own paragraph to separate scene and action. - Reduce indicators of uncertainty like "trying" or "maybe" When writing text: - NEVER conclude the scene on your own, follow the beat instructions very closely. - NEVER end with foreshadowing. - NEVER write further than what I prompt you with. - AVOID imagining possible endings, NEVER deviate from the instructions. - STOP EARLY if the continuation contains what was required in the instructions. You do not need to fill out the full amount of words possible.
User/Human
Take into account the following glossary of characters/locations/items/lore... when writing your response: <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> Continue the story using the following instructions: <instructions> 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. </instructions>

Model response

AI
The abandoned station breathed damp air through the broken ticket hall. Detective Harlow Quinn stepped over the yellow line painted across the platform and kept one hand near her coat pocket, where her warrant card rested beside her phone. Water ticked from the tunnel roof. Somewhere beyond the sealed tracks, a train groaned through the earth, though no Underground service had run through Camden Passage for thirty-seven years. The dead man lay beneath the station clock. He wore a charcoal suit, polished shoes, and a silver mask pulled over the lower half of his face. His throat showed above the collar. A dark cut crossed it from ear to ear. No blood had reached the tiles. Constable Merrick crouched beside the body with his notebook balanced on one knee. He had wrapped a scarf across his nose, though the air smelled of rust, wet stone, and something sweet beneath it. “You took your time,” he called. Quinn checked her leather watch. The hands showed 11:48 p.m. “You called me six minutes ago.” “Feels longer down here.” “That was not the question.” Merrick’s mouth tightened. “Victim’s male, late thirties or early forties. No identification. One wound to the throat. No weapon found. No witnesses. We had a report of shouting from the street above, then a light came on in the station.” “Who reported it?” “A bookseller from Camden High Street. He saw the light through a ventilation grate.” Quinn scanned the platform. The old station had been stripped of its signage, but fragments remained: a tiled advertisement for tonic wine, a cracked route map, a row of iron pillars carrying flaking green paint. Plastic sheeting covered a section of the far wall. Behind it, someone had hung lanterns from exposed pipes. Merrick gestured towards the corpse. “Looks like a gang execution. They bring him down here, cut him open, leave him for someone to find.” “His throat’s cut.” “Same principle.” Quinn moved closer. She did not crouch. The body had fallen on its back, arms spread, right hand curled around something black. His coat lay smooth beneath him. His shoes showed no mud. No fibres clung to the knees or elbows. The station floor carried a film of grey dust except where the police had walked. A set of footprints marked the platform from the stairwell. Heavy boots. Merrick’s. Two pairs from the responding officers. One line of smaller prints led from the old ticket office to the body. Quinn pointed with her pen. “Whose?” “Victim’s, I assumed.” “His soles are clean.” Merrick glanced down at the man’s shoes. “Could have been carried.” “Then why are there footprints?” He leaned over the body. “Someone wore the same size.” “Both feet?” The prints appeared in neat succession, toe to heel, with no scuffing. They ended beside the dead man’s right shoulder. The next mark lay three feet away, beyond his outstretched hand, and faced the opposite direction. Merrick rubbed his jaw. “Could be two people.” “Could be.” “Or our killer walked around him.” “There are no prints around him.” He looked at the floor again, then stood and turned towards the stairwell as if the answer might be painted there. Quinn stepped past the body. The silver mask had no straps. It clung to the dead man’s face as if moulded there. She took out a pair of gloves and pulled them on. “Did you touch it?” “No.” “Good.” She leaned over the mask. Its surface reflected the lantern light in a dull, bruised sheen. Symbols had been scratched across the forehead: three hooked lines inside a circle. Quinn had seen similar markings in the photographs recovered from DS Morris’s final case. The files had called them a gang insignia. The pattern had appeared on doors, coins, and the inside of Morris’s coat pocket. She reached for the edge of the mask. A voice came from behind the plastic sheeting. “Don’t lift that.” Eva Kowalski stepped through the gap, carrying her worn leather satchel against her hip. Her curly red hair had escaped its tie, and her round glasses caught the lantern glow. Freckles stood out across her pale face. She tucked a strand behind her left ear. Merrick stiffened. Quinn turned. “You were told to stay outside.” “I was told the police had found a body in an abandoned station. That leaves room for interpretation.” “There’s no room for you.” Eva looked at the corpse. “There’s no room for him either, if that cut is real.” Merrick gave a humourless laugh. “You want to explain that?” “It’s not a cut.” Quinn watched Eva’s eyes track along the victim’s throat. “Then what is it?” “A seal.” Merrick shifted his weight. “We’ve got a body with a slit throat.” “You’ve got a body with a mark shaped like a slit throat.” Eva opened her satchel and withdrew a thick book wrapped in brown paper. Quinn recognised the blue-edged pages of a restricted archive catalogue. “Put that away,” Quinn said. “I brought it because you’d ask.” “I didn’t ask.” “You’re looking at the symbols.” Eva set the book on an old bench. Dust rose around it. She opened to a page crowded with diagrams and cramped notes. Merrick peered over her shoulder. “Is that Latin?” “Some of it.” “Lovely. We’ll call the priest.” “It isn’t a religious mark.” Quinn kept her attention on the body. The dark line across the throat had no raised edges. The skin around it lacked bruising. No blood had dried beneath the collar, and the man’s tongue had not swollen against his teeth. She placed two fingers near the wound without touching it. The skin held no warmth. “Estimated time of death?” she asked. Merrick checked his notebook. “Between ten and eleven.” “Based on?” “Body temperature. Rigidity. The usual.” “The station’s colder than the street.” “I allowed for that.” “By how much?” His eyes narrowed. “You want to run the post-mortem yourself?” “I want the calculation.” Merrick flipped a page. “Death occurred at least an hour ago. Possibly two.” Quinn looked at her watch again. The minute hand had not moved. 11:48 p.m. She tapped the glass with one gloved finger. The second hand jerked forward, stopped, then jumped back three marks. Eva noticed. “You’re seeing it too,” she murmured. Merrick frowned. “Seeing what?” “Nothing,” Quinn replied. She moved to the nearest lantern. Its flame burned without flickering, though cold air moved across the platform. The light fell sharply around the corpse, making a clean black shape beneath the body. No shadow extended from the lantern. Quinn shifted left. The black shape remained fixed. She shifted right. It stayed beneath the man as if painted onto the tiles. Merrick stepped beside her. “Power surge,” he said. “Old wiring. Lights do odd things down here.” “The lanterns are oil.” “Then someone fixed them.” “Who?” “People use the station. Squatters, drug dealers. This is Camden.” Eva closed the book. “No. This is the Veil Market.” Merrick stared at her. Quinn’s gaze went to the old ticket office. A brass grille covered its entrance. Beyond it, shelves had been set against the wall. Jars glimmered between the rails. Some held powders, others held dark liquids with slow-moving shapes inside. A rack displayed knives whose handles had been carved from bone. The Market had moved beneath Camden at the full moon. Quinn had heard rumours for months, always from people who refused to give names. A hidden exchange for banned alchemy, enchanted goods, and information. She had dismissed it as the criminal mythology of a group she could not yet pin down. On the platform, the rumours had acquired shelves. Merrick drew his baton. “Those weren’t there when we arrived.” “They were,” Eva said. “You didn’t see them.” His hand tightened around the baton. “What are you implying?” “Your eyes passed over them.” Quinn crossed to the ticket office. The shelves held stoppered bottles, bundles of grey feathers, small copper cages, and a line of bone tokens carved with a hole through the centre. One empty space sat between two tokens. She took out her phone and photographed the gap. Eva came up behind her. “The Market only opens to people carrying one of those.” “Where did you learn that?” “Restricted archives.” “Your employer knows you’re here?” “My employer knows I’m at home with a stomach bug.” “Your employer will be delighted.” Eva tucked the book beneath her arm. “The station moves every full moon. Not physically. The entrance does. Tonight it opened here.” Quinn glanced back at the body. “Who was he?” “No idea.” “You recognised the seal.” “I recognised the style. That doesn’t mean I know the victim.” “You knew enough to tell Merrick not to touch the mask.” “Because it might still be active.” Merrick came towards them. “I’ve called forensics. They’re waiting at the entrance. We need to move the body.” “No,” Quinn said. He stopped. She pointed to the platform. “Look at the dust.” Merrick followed the line of her pen. The footprints from the stairwell did not begin at the first step. They began halfway down, suspended over nothing. Each mark appeared on the stone as though the person had entered the station in mid-stride. Quinn returned to the corpse and examined the black object in his hand. It was not a weapon. Verdigris covered a small brass compass. Protective sigils ringed its face. The needle spun once, then settled towards the plastic sheeting. The victim’s fingers had locked around it after death. His nails contained no skin, no blood, no fibres. Eva saw the compass and went still. “That’s a Veil Compass.” “Useful name.” “It points towards rifts.” “Rifts?” “Portals. Openings between places.” Merrick shook his head. “There’s a tunnel behind that wall. The compass is pointing at the tunnel.” Quinn lifted the object without breaking the victim’s grip. The needle swung away from the sealed track and aimed at the body. Then it tilted downward. Quinn looked at the tiles. The black shadow under the corpse had no edge. It spread beneath him in a perfect oval, darker than the gaps between the platform stones. The compass needle pointed into its centre. She lowered herself beside the body. “Don’t touch the shadow,” Eva warned. Quinn ignored her. She held the compass over the dead man’s chest. The needle trembled. Its tip pointed not at the throat, not at the mask, but at the victim’s left hand. His fingers were curled around empty air. Quinn stared at the space between them. A faint impression marked the dust: five narrow depressions, as if another hand had pressed down from above. She turned the corpse’s wrist. A pale ring encircled it. No bruise. No cut. Beneath the skin, something metallic glinted, travelling from the pulse point towards the elbow. Merrick bent over her shoulder. “What is that?” Quinn pulled a small torch from her coat and shone it across the arm. The glint moved against the light. Eva’s breath caught. “That’s not under his skin.” Quinn looked at the dark oval beneath the body. The thing inside the victim’s arm slid towards his hand, pushing the skin into a narrow ridge. His fingers opened. Nothing fell out. The compass needle snapped towards the empty space in his palm. Quinn’s torch beam crossed the floor. A second set of footprints appeared in the dust, one mark at a time, leading from the victim’s hand towards her own boots.
created_at"2026-07-09T18:12:50.128Z" 7/9/2026, 6:12:50 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1952
moderation_latency(null)
generation_time18033
tokens_prompt1149
tokens_completion3249
native_tokens_prompt1009
native_tokens_completion2694
native_tokens_completion_images0
native_tokens_reasoning185
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"
usage0.017173
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_0306d3f9d0739d89016a4fe4a234448193bcb5d5703183cb72"
is_byokfalse
latency235
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-1783620770-dRKIkXgNz8o1cOja9Fqp"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620770-3pmmRAfNnwSkZJAZn4uS"
upstream_id"resp_0306d3f9d0739d89016a4fe4a234448193bcb5d5703183cb72"
total_cost0.017173
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
totalTags9
adverbTagCount0
adverbTags(empty)
dialogueSentences93
tagDensity0.097
leniency0.194
rawRatio0
effectiveRatio0
97.37% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1900
totalAiIsmAdverbs1
found
0
adverb"sharply"
count1
highlights
0"sharply"
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)
78.95% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1900
totalAiIsms8
found
0
word"scanned"
count1
1
word"weight"
count1
2
word"warmth"
count1
3
word"stomach"
count1
4
word"perfect"
count1
5
word"trembled"
count1
6
word"pulse"
count1
7
word"glint"
count1
highlights
0"scanned"
1"weight"
2"warmth"
3"stomach"
4"perfect"
5"trembled"
6"pulse"
7"glint"
100.00% Cliché density
Target: ≤1 cliche(s) per 800-word window
totalCliches1
maxInWindow1
found
0
label"eyes widened/narrowed"
count1
highlights
0"eyes narrowed"
100.00% Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells0
narrationSentences170
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount2
hedgeCount0
narrationSentences170
filterMatches
0"watch"
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences254
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen37
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1900
ratio0
matches(empty)
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions18
unquotedAttributions0
matches(empty)
48.92% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions70
wordCount1385
uniqueNames10
maxNameDensity2.02
worstName"Quinn"
maxWindowNameDensity3.5
worstWindowName"Quinn"
discoveredNames
Harlow1
Quinn28
Underground1
Camden2
Passage1
Merrick20
Morris2
Kowalski1
Eva13
Market1
persons
0"Harlow"
1"Quinn"
2"Merrick"
3"Morris"
4"Kowalski"
5"Eva"
6"Market"
places
0"Camden"
globalScore0.489
windowScore0.5
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences105
glossingSentenceCount0
matches(empty)
94.74% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches2
per1kWords1.053
wordCount1900
matches
0"not at the throat, not at the mask, but at the victim’s left hand"
1"not at the mask, but at the victim’s left hand"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences254
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs164
mean11.59
std12.79
cv1.104
sampleLengths
011
157
28
334
46
534
66
710
86
94
105
1140
123
1314
1453
155
1619
173
182
1941
2048
215
221
233
244
2511
265
2710
282
2936
304
314
322
336
346
3521
3633
374
381
391
4065
418
428
433
4445
452
462
476
4818
495
97.01% Passive voice overuse
Target: ≤2% passive sentences
passiveCount4
totalSentences170
matches
0"been stripped"
1"been scratched"
2"been carved"
3"were curled"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount0
totalVerbs226
matches(empty)
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount0
semicolonCount0
flaggedSentences0
totalSentences254
ratio0
matches(empty)
94.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1389
adjectiveStacks1
stackExamples
0"lay smooth beneath him."
adverbCount20
adverbRatio0.014398848092152628
lyAdverbCount2
lyAdverbRatio0.0014398848092152627
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences254
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences254
mean7.48
std5.33
cv0.713
sampleLengths
011
128
26
323
48
519
66
79
86
913
1021
116
125
135
146
154
165
173
1837
193
2014
214
2231
239
249
255
2619
273
282
293
304
3115
326
335
348
3515
3610
372
381
396
4014
415
421
433
444
457
464
475
485
495
48.43% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats7
diversityRatio0.30708661417322836
totalSentences254
uniqueOpeners78
44.15% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount2
totalSentences151
matches
0"Somewhere beyond the sealed tracks,"
1"Then it tilted downward."
ratio0.013
100.00% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount38
totalSentences151
matches
0"He wore a charcoal suit,"
1"His throat showed above the"
2"He had wrapped a scarf"
3"She did not crouch."
4"His coat lay smooth beneath"
5"His shoes showed no mud."
6"He leaned over the body."
7"They ended beside the dead"
8"He looked at the floor"
9"It clung to the dead"
10"She took out a pair"
11"She leaned over the mask."
12"Its surface reflected the lantern"
13"She reached for the edge"
14"Her curly red hair had"
15"She tucked a strand behind"
16"She opened to a page"
17"She placed two fingers near"
18"His eyes narrowed."
19"She tapped the glass with"
ratio0.252
6.36% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount137
totalSentences151
matches
0"The abandoned station breathed damp"
1"Detective Harlow Quinn stepped over"
2"Water ticked from the tunnel"
3"The dead man lay beneath"
4"He wore a charcoal suit,"
5"His throat showed above the"
6"A dark cut crossed it"
7"Constable Merrick crouched beside the"
8"He had wrapped a scarf"
9"Quinn checked her leather watch."
10"The hands showed 11:48 p.m."
11"Merrick’s mouth tightened."
12"Quinn scanned the platform."
13"The old station had been"
14"Plastic sheeting covered a section"
15"Merrick gestured towards the corpse."
16"Quinn moved closer."
17"She did not crouch."
18"The body had fallen on"
19"His coat lay smooth beneath"
ratio0.907
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences151
matches(empty)
ratio0
100.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences52
technicalSentenceCount1
matches
0"A faint impression marked the dust: five narrow depressions, as if another hand had pressed down from above."
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags9
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags9
fancyCount2
fancyTags
0"she murmured (murmur)"
1"Eva warned (warn)"
dialogueSentences93
tagDensity0.097
leniency0.194
rawRatio0.222
effectiveRatio0.043
86.9970%