Run: 2026-03-12-01KKHZ6AFZGFAM1MKSG5XK5NRH

Run Details

Duration:
12.3s
Cost:
$0.013595
Provider:
xAI

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 abandoned Camden Town station smelled of wet concrete, ozone, and something sharper—like burnt copper left too long on a stove. Detective Harlow Quinn stepped off the last functioning escalator, her boots ringing against the tiled floor with military precision. The platform had been cordoned off with police tape that looked absurdly bright against the mildew-stained walls. Emergency lights on tall stands threw harsh white pools across the tracks, turning everything else into shadow. She checked her watch. Two-thirty in the morning. The call had come in at one-twelve. Unusual location, unusual time, unusual victim. Three unusuals in one night usually meant she was about to ruin someone’s week. “Quinn,” a voice called from the far end of the platform. Detective Sergeant Paul McCarthy waved her over. He was younger than her by a decade, still carrying the eager posture of someone who believed the job could be won with enough enthusiasm. His tie was loosened, and a smear of fingerprint powder marred the knee of his trousers. “Body’s down on the tracks,” he said, offering her a pair of nitrile gloves. “Male, late twenties. No ID yet. Looks like he fell, but...” “But?” She pulled the gloves on with a snap. McCarthy hesitated. “But the fall didn’t kill him. At least, not the way it should have.” Harlow descended the metal stairs to track level. The air grew colder, heavier. The body lay sprawled between the rails like a discarded marionette, limbs at unnatural angles. A young man with a neat beard and an expensive haircut. His eyes were open, fixed on the curved ceiling in an expression of pure astonishment. Blood had pooled beneath his head, but not nearly enough for the damage she could see from ten feet away. She crouched beside the corpse. The skull was caved in at the temple, a deep indentation that looked as though something blunt and heavy had struck him with tremendous force. Yet the blood on the rails beneath him was minimal, and there were no corresponding spatter patterns on the nearby walls or overhead girders. “Witnesses?” she asked without looking up. “None that we’ve found. Station’s been closed for renovation for six months. Night watchman heard a shout around one, came down, found him like this. Called it in.” Harlow studied the man’s hands. No defensive wounds. The fingernails were clean. His clothing—a dark wool coat over a cashmere jumper—showed no tears, no signs of a struggle. A thin silver chain had snapped around his neck; the pendant was missing. She reached out and gently turned the man’s head. The wound was perfectly circular, almost too clean. The edges of the crushed bone were smooth, as if the blow had been delivered by something designed for precision rather than brute force. “Murder,” she said quietly. McCarthy shifted behind her. “Or accident. Could’ve jumped. People do strange things in abandoned places.” She ignored him, rising to scan the platform above. The emergency lights cast long shadows between the pillars. Something about the angle of the body nagged at her. If he’d fallen from the platform, he should have landed closer to the edge. Instead, he lay almost dead centre between the rails, as though he’d been placed there. She climbed back up. The platform tiles were slick with condensation. Near the yellow safety line, she found a single drop of blood no larger than a penny. She photographed it, then followed the invisible trail with her torch. Another drop, three feet further on. Then nothing. McCarthy joined her, hands in his pockets. “Coroner’s on the way. Forensics reckons he’s been dead less than an hour. But there’s something else. His shoes.” Harlow glanced down at the dead man’s feet. The black leather Oxfords were pristine except for the toes, which were scorched black. The rubber soles had partially melted. “Electrical burn?” McCarthy suggested. “Maybe he touched the third rail.” “The third rail’s been decommissioned,” she replied. “They ripped it out during renovation.” McCarthy shrugged. “Then maybe something else burned him. Or maybe he was running from something.” She didn’t answer. Instead, she walked the length of the platform, counting her steps, noting every anomaly. Halfway along, she found a small object wedged between two cracked tiles. She crouched and pried it free with a pen. It was a small brass disc, no larger than a two-pound coin, its surface etched with strange symbols that hurt to look at directly. A compass of some kind, though the needle inside twitched erratically even though she held it perfectly still. The casing had a greenish patina, as though it had been underwater for years. She turned it over. On the back, faint letters had been scratched: *E.K.* Eva Kowalski. Harlow’s jaw tightened. She slipped the compass into an evidence bag, heart beating faster than she cared to admit. She knew that satchel full of strange books. She’d seen Eva twice in the last month, once leaving an occult bookshop in Soho and again talking intently with a group of young people who looked far too well-dressed to be students. The same group this dead man had been part of, she suspected. She returned to the body. This time she noticed what she’d missed before: a faint pattern of burns across the man’s chest, visible now that his coat had fallen open. Not random. Sigils. The same shapes as those on the brass compass. McCarthy was still talking. “—probably some kind of cult thing. You know how these kids get with their internet rituals. Maybe he was trying to summon something and it went wrong.” Harlow said nothing. She was remembering her partner, DS Morris, three years ago. The way his body had been found in an empty warehouse with similar burns across his chest. The way the official report had called it “death by misadventure” while the photographs in the sealed file told a different story. She had never believed it. Now the same impossible details were crawling back into her life like rot through old wood. She stood up, brushing dust from her knees. “I want the whole station swept. Every tunnel, every maintenance room. And get me the schematics. This place used to connect to the old Fleet River culvert, didn’t it?” McCarthy blinked. “Yeah, but that was bricked up decades ago.” “Check anyway.” She moved toward the far end of the platform where the tunnel mouth gaped like a throat. The darkness beyond seemed thicker than it should, resisting the beams of their torches. As she got closer, the brass compass in her pocket began to vibrate. She pulled it out. The needle had stopped its wild spinning and now pointed steadily into the tunnel, trembling with urgency. McCarthy appeared at her shoulder. “You’re not thinking of going in there without backup?” “I’m thinking the evidence doesn’t match any known pattern of death,” she said. “Not suicide. Not simple murder. Something brought him down here. Something he was looking for.” “Or running from,” McCarthy countered. “Look, Quinn, I’ve seen your file. I know about Morris. But this isn’t the same. This is just some rich kid who got in over his head with the wrong crowd.” Harlow turned the compass in her fingers. The protective sigils seemed to shimmer under the emergency lights. She thought of Eva Kowalski’s nervous habit of tucking her curly red hair behind her ear. Thought of the leather satchel always bursting with books on dead languages and forbidden rites. Thought of how Eva had smiled at her once, two months ago, during a routine inquiry about a missing manuscript, and how that smile had carried secrets behind it. “You ever feel like the world is bigger than they tell us, Paul?” she asked quietly. He frowned. “I feel like people murder each other for stupid reasons every single day. That’s big enough for me.” She nodded, as if agreeing, but her eyes remained fixed on the tunnel. The air coming from it carried a faint scent of myrrh and ozone. The same smell that had clung to Morris’s clothes the night they found him. The compass needle jerked hard left, toward a section of wall that looked no different from the rest. Harlow approached it, running her gloved fingers along the tiles. They were loose. One shifted under pressure. She worked it free. Behind it lay a narrow gap, just wide enough for a person to squeeze through. Fresh scrape marks showed on the brickwork. Someone had passed this way recently, and in a hurry. She turned to McCarthy. “Call in SOCO. Tell them I need the full works—UV, luminol, the lot. And get a team down here. We’re going through.” “Quinn—” “Something’s wrong with this scene,” she cut him off. “The wound was made by an object that doesn’t exist in any police database. The burns are ritualistic. The body was moved after death. And this—” she held up the brass compass “—was left behind deliberately. A message, or a warning. Either way, it’s connected to something larger.” McCarthy stared at the strange device. “That looks like it belongs in a museum.” “It belonged to someone who knows exactly what happened here,” Harlow said. She thought of Eva again, of the way the young woman’s green eyes had always seemed to see more than they should. “And I’m going to find them before they disappear into whatever hole they crawled out of.” She tightened her grip on the torch. The brass compass continued to point into the darkness, its needle steady as a compass rose on a map of hell. For the first time in three years, Harlow Quinn felt the familiar pull of the inexplicable. The same pull that had swallowed Morris whole. She stepped through the gap in the wall, boots scraping against ancient brick. The temperature dropped sharply. Somewhere ahead, water dripped with the slow rhythm of a heartbeat. The air tasted of iron and secrets. Behind her, McCarthy’s voice echoed, growing fainter. “Quinn, wait for backup, damn it!” She didn’t wait. The compass was pulling her forward, and for once the evidence was speaking clearly. This wasn’t a simple murder. This was the edge of something vast and hidden, something that had been watching her since the night her partner died screaming in a language no human throat should produce. Harlow Quinn descended into the dark beneath Camden, salt-and-pepper hair catching the last of the emergency light before the tunnel swallowed her completely. In her pocket, the Veil Compass hummed against her ribs like a second, colder heart. Whatever had killed the man on the tracks had left its calling card. Now she intended to return it.
created_at"2026-03-12T21:28:09.987Z" 3/12/2026, 9:28:09 PM
model"x-ai/grok-4.20-beta-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency307
moderation_latency(null)
generation_time12092
tokens_prompt923
tokens_completion2797
native_tokens_prompt932
native_tokens_completion2224
native_tokens_completion_images0
native_tokens_reasoning0
native_tokens_cached896
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.0135952
router(null)
provider_responses
0
endpoint_id"33f49f24-a0de-4dcf-872d-ca514e83fbae"
id"582db1ad-ed9b-a8a9-3c76-bc004a1520d3"
is_byokfalse
latency271
model_permaslug"x-ai/grok-4.20-beta-20260309"
provider_name"xAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer(null)
api_type"completions"
id"gen-1773350889-SwLJUUM03YO2fAEZGYZu"
upstream_id"582db1ad-ed9b-a8a9-3c76-bc004a1520d3"
total_cost0.0135952
cache_discount0.0016128
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
85.71% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags14
adverbTagCount2
adverbTags
0"she said quietly [quietly]"
1"she asked quietly [quietly]"
dialogueSentences35
tagDensity0.4
leniency0.8
rawRatio0.143
effectiveRatio0.114
83.15% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1780
totalAiIsmAdverbs6
found
0
adverb"gently"
count1
1
adverb"perfectly"
count2
2
adverb"deliberately"
count1
3
adverb"sharply"
count1
4
adverb"completely"
count1
highlights
0"gently"
1"perfectly"
2"deliberately"
3"sharply"
4"completely"
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)
85.96% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1780
totalAiIsms5
found
0
word"pristine"
count1
1
word"etched"
count1
2
word"database"
count1
3
word"familiar"
count1
4
word"echoed"
count1
highlights
0"pristine"
1"etched"
2"database"
3"familiar"
4"echoed"
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
emotionTells1
narrationSentences132
matches
0"g with urgency"
88.74% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount1
hedgeCount4
narrationSentences132
filterMatches
0"watch"
hedgeMatches
0"began to"
1"seemed to"
2"tended to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences153
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
maxSentenceWordsSeen48
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans1
markdownWords1
totalWords1777
ratio0.001
matches
0"E.K."
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions14
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions48
wordCount1374
uniqueNames15
maxNameDensity0.95
worstName"McCarthy"
maxWindowNameDensity2
worstWindowName"McCarthy"
discoveredNames
Camden2
Town1
Harlow11
Quinn3
Detective2
Sergeant1
Paul1
McCarthy13
Oxfords1
Eva5
Kowalski2
Soho1
Morris3
Veil1
Compass1
persons
0"Harlow"
1"Quinn"
2"Sergeant"
3"Paul"
4"McCarthy"
5"Eva"
6"Kowalski"
7"Morris"
8"Compass"
places
0"Camden"
1"Town"
2"Soho"
globalScore1
windowScore1
94.44% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences90
glossingSentenceCount2
matches
0"seemed thicker than it should, resisting the beams of their torches"
1"as if agreeing but her eyes remained fixed on the tunnel"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1777
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences153
matches
0"knew that satchel"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs54
mean32.91
std21.54
cv0.655
sampleLengths
074
135
211
348
425
59
616
774
854
96
1028
1141
1241
134
1415
1557
1647
1726
1828
1910
2013
2115
2238
2369
242
2572
2642
2731
2873
2937
3010
312
3265
3314
3428
3536
3677
3716
3820
3940
4039
4132
4226
431
4457
4514
4650
4752
4835
4913
86.66% Passive voice overuse
Target: ≤2% passive sentences
passiveCount7
totalSentences132
matches
0"been cordoned"
1"was loosened"
2"was caved"
3"been delivered"
4"been placed"
5"been scratched"
6"been found"
46.39% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount5
totalVerbs217
matches
0"was still talking"
1"was remembering"
2"were crawling"
3"was pulling"
4"was speaking"
86.83% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount3
semicolonCount1
flaggedSentences3
totalSentences153
ratio0.02
matches
0"The abandoned Camden Town station smelled of wet concrete, ozone, and something sharper—like burnt copper left too long on a stove."
1"His clothing—a dark wool coat over a cashmere jumper—showed no tears, no signs of a struggle."
2"A thin silver chain had snapped around his neck; the pendant was missing."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1383
adjectiveStacks0
stackExamples(empty)
adverbCount48
adverbRatio0.03470715835140998
lyAdverbCount19
lyAdverbRatio0.01373825018076645
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences153
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences153
mean11.61
std7.78
cv0.67
sampleLengths
021
119
217
317
44
54
67
76
814
911
107
1125
1216
1314
1411
159
162
1714
188
195
2015
2111
2215
2320
245
2525
2624
276
2828
295
303
314
3216
3313
349
358
3624
374
384
3911
409
419
4210
4314
4415
454
467
4717
4811
496
58.82% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats10
diversityRatio0.39215686274509803
totalSentences153
uniqueOpeners60
84.03% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount3
totalSentences119
matches
0"Instead, he lay almost dead"
1"Instead, she walked the length"
2"Somewhere ahead, water dripped with"
ratio0.025
88.91% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount39
totalSentences119
matches
0"She checked her watch."
1"He was younger than her"
2"His tie was loosened, and"
3"he said, offering her a"
4"She pulled the gloves on"
5"His eyes were open, fixed"
6"She crouched beside the corpse."
7"she asked without looking up"
8"His clothing—a dark wool coat"
9"She reached out and gently"
10"she said quietly"
11"She ignored him, rising to"
12"She climbed back up."
13"She photographed it, then followed"
14"She didn’t answer."
15"She crouched and pried it"
16"It was a small brass"
17"She turned it over."
18"She slipped the compass into"
19"She knew that satchel full"
ratio0.328
52.44% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount97
totalSentences119
matches
0"The abandoned Camden Town station"
1"Detective Harlow Quinn stepped off"
2"The platform had been cordoned"
3"Emergency lights on tall stands"
4"She checked her watch."
5"The call had come in"
6"a voice called from the"
7"Detective Sergeant Paul McCarthy waved"
8"He was younger than her"
9"His tie was loosened, and"
10"he said, offering her a"
11"She pulled the gloves on"
12"Harlow descended the metal stairs"
13"The air grew colder, heavier."
14"The body lay sprawled between"
15"A young man with a"
16"His eyes were open, fixed"
17"Blood had pooled beneath his"
18"She crouched beside the corpse."
19"The skull was caved in"
ratio0.815
100.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount3
totalSentences119
matches
0"If he’d fallen from the"
1"Now the same impossible details"
2"Now she intended to return"
ratio0.025
9.69% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences59
technicalSentenceCount11
matches
0"The platform had been cordoned off with police tape that looked absurdly bright against the mildew-stained walls."
1"He was younger than her by a decade, still carrying the eager posture of someone who believed the job could be won with enough enthusiasm."
2"The skull was caved in at the temple, a deep indentation that looked as though something blunt and heavy had struck him with tremendous force."
3"The edges of the crushed bone were smooth, as if the blow had been delivered by something designed for precision rather than brute force."
4"The black leather Oxfords were pristine except for the toes, which were scorched black."
5"Instead, she walked the length of the platform, counting her steps, noting every anomaly."
6"It was a small brass disc, no larger than a two-pound coin, its surface etched with strange symbols that hurt to look at directly."
7"The casing had a greenish patina, as though it had been underwater for years."
8"She’d seen Eva twice in the last month, once leaving an occult bookshop in Soho and again talking intently with a group of young people who looked far too well-…"
9"The same smell that had clung to Morris’s clothes the night they found him."
10"This was the edge of something vast and hidden, something that had been watching her since the night her partner died screaming in a language no human throat sh…"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags14
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags9
fancyCount1
fancyTags
0"McCarthy suggested (suggest)"
dialogueSentences35
tagDensity0.257
leniency0.514
rawRatio0.111
effectiveRatio0.057
88.3924%