Run: 2026-05-31-01KSYXP6ZYM9FRQP3WPD626VXJ

Run Details

Duration:
39.6s
Cost:
$0.060500
Provider:
Anthropic

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 descent into the abandoned station smelled of wet brick and something older, something Quinn couldn't name. She held her torch low, sweeping the beam across the stairs as she went down, counting each step out of an old habit. Forty-two to the platform. The numbers steadied her the way they always had, the way DS Morris used to mock her for. "Watch the third from the bottom," called a voice below. "It's cracked clean through." Detective Sergeant Pell stood on the platform with two uniforms and a forensics tech who looked like he'd rather be anywhere else. Pell was young, eager, the kind of officer who treated every scene like a puzzle box he could rattle open by force. He'd called her at half eleven, breathless, saying he'd found something she had to see. Quinn stepped over the cracked stair and onto the platform. The station had been sealed since the seventies, according to the briefing — disused, forgotten, the entrance bricked over from the street. Yet someone had pried the bricks loose, recently and cleanly. She'd noted the fresh mortar dust on her way in. "Down here," Pell said, leading her along the platform to where a tarpaulin had been thrown over a shape on the tiles. The body lay face-up. Male, mid-forties, dressed in a charcoal overcoat too fine for this place. No visible wounds. His eyes were open, fixed on the curved ceiling, and his face wore an expression Quinn had seen only a handful of times in eighteen years — not pain, not fear exactly, but a kind of arrested astonishment, as though he'd been interrupted mid-thought. "No ID," Pell said. "No phone, no wallet. But look at this." He crouched and pointed at the man's right hand. The fingers were curled around something. A small brass object, green with age. "We haven't bagged it yet. Thought you'd want to see in situ." Quinn knelt. Her knees protested; forty-one years and too many cold floors. She drew on a glove and gently turned the object in the dead man's grip without removing it. A compass. Old, the brass casing furred with verdigris, the face etched with markings she didn't recognize — not cardinal points but symbols, looping and deliberate. The needle was not pointing north. It quivered faintly, aimed down the dark mouth of the tunnel. "Magnetic interference," Pell offered. "All the old rail down here. Anyway, the cause of death's the strange part. Doc's preliminary says cardiac arrest. No trauma, no toxins he could spot, nothing. Bloke just dropped. My money's on a drug deal gone wrong — you get all sorts using these old stations. He came down to meet someone, his heart gave out, the dealer panicked and stripped him of anything traceable." Quinn didn't answer at once. She was looking at the tiles around the body. "Stripped him," she repeated. "But left the compass." "Maybe they missed it. It was under his hand." "His hand is closed around it, Sergeant. Not under. Around." She studied the curled fingers. "You don't grip something in death by accident. Cadaveric spasm — instantaneous rigor at the moment of death — only happens under extreme exertion or emotional intensity. He was holding this hard when he died. Holding it like it mattered." She sat back on her heels. "A dealer who took the trouble to lift his wallet and phone would have to physically pry this from his fist. And they didn't bother. Why?" Pell shrugged. "Sentiment? Superstition?" "Or they wanted us to wonder." Quinn rose and let her torch travel across the floor. The dust here was thick, undisturbed for decades — except it wasn't. There were marks. She crouched again, lower this time, angling the beam flat across the tiles so the light raked the surface. Footprints. Dozens of them, leading from the tunnel mouth to a point on the platform and back again. But they didn't approach the body. They formed a ring around it, a clear margin of perhaps four feet that no foot had crossed. And within that margin, the dust lay perfectly smooth. "Pell. Come here. Get down to my level." He did, grumbling, and she watched his expression change as he saw it. "That's—" He stopped. "Someone swept it. Cleaned around him." "No broom marks. A swept floor leaves striations. This is smooth." She held her hand a few inches above the clean tiles, not knowing why. The air there felt wrong — not cold, not warm, but thin, as if she were breathing at altitude. The hair on her forearm lifted. "Nothing disturbed this dust. Nothing walked here. And yet he's lying in the center of it without a single footprint leading to where he fell." "So how'd he get there?" She had no answer that would satisfy a man like Pell, a man who needed the world to behave. She wasn't sure she had one that satisfied herself. But the thinness in the air, the impossible clean ring, the compass needle trembling toward the dark — it stirred something she'd kept locked down for three years. Morris had died like this. No wound. No explanation. A look of astonishment on a face she'd known better than her own. They'd written it up as a coronary and closed the file, and she had let them, because the alternative had no name and no place in any report she knew how to file. "Bag the compass," she said quietly. "But photograph the grip first, every angle. And I want the footprints cast, all of them, even the ones in the tunnel." "You really think this is a murder?" Quinn straightened. She looked at the brass needle, still pointing into the black throat of the tunnel as though it knew something the rest of them didn't. Down there, the darkness seemed to hold its breath. "I think," she said, "that the obvious story has been left here for us like a coat on a hook. Tidy. Convenient. Designed to be taken." She tucked the thought away beside the older one, the one with Morris's name on it. "I don't trust convenient, Sergeant. Someone went to a great deal of trouble to make this simple." She glanced once more down the tunnel, and for just a moment, she thought she felt something glance back. "Get me everything," she said. "I'm not done here."
created_at"2026-05-31T11:46:12.108Z" 5/31/2026, 11:46:12 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
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cancelledfalse
latency3382
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generation_time39503
tokens_prompt923
tokens_completion1645
native_tokens_prompt1285
native_tokens_completion2163
native_tokens_completion_images(null)
native_tokens_reasoning85
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"end_turn"
service_tier"default"
usage0.0605
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provider_responses
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endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
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is_byokfalse
latency1297
model_permaslug"anthropic/claude-4.8-opus-20260528"
provider_name"Anthropic"
status200
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Evaluation details

Result Evaluator Details Meta Data
62.07% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags12
adverbTagCount2
adverbTags
0"She sat back [back]"
1"she said quietly [quietly]"
dialogueSentences29
tagDensity0.414
leniency0.828
rawRatio0.167
effectiveRatio0.138
85.77% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1054
totalAiIsmAdverbs3
found
0
adverb"gently"
count1
1
adverb"perfectly"
count1
2
adverb"really"
count1
highlights
0"gently"
1"perfectly"
2"really"
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)
81.02% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1054
totalAiIsms4
found
0
word"etched"
count1
1
word"quivered"
count1
2
word"magnetic"
count1
3
word"intensity"
count1
highlights
0"etched"
1"quivered"
2"magnetic"
3"intensity"
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
narrationSentences64
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount1
narrationSentences64
filterMatches(empty)
hedgeMatches
0"seemed to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences79
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen65
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1063
ratio0
matches(empty)
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions13
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions19
wordCount726
uniqueNames5
maxNameDensity0.96
worstName"Quinn"
maxWindowNameDensity2
worstWindowName"Quinn"
discoveredNames
Quinn7
Morris3
Detective1
Sergeant1
Pell7
persons
0"Quinn"
1"Morris"
2"Sergeant"
3"Pell"
places(empty)
globalScore1
windowScore1
91.86% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences43
glossingSentenceCount1
matches
0"looked like he'd rather be anywhere else"
0.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches5
per1kWords4.704
wordCount1063
matches
0"not pain, not fear exactly, but a kind of arrested astonishment, as though he'd been interru"
1"not fear exactly, but a kind of arrested astonishment, as though he'd been interru"
2"not cardinal points but symbols, looping"
3"not cold, not warm, but thin, as if she were breathing at altitude"
4"not warm, but thin, as if she were breathing at altitude"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences79
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs28
mean37.96
std29.3
cv0.772
sampleLengths
062
114
259
352
422
563
646
773
870
914
108
119
1287
134
1450
1551
168
1713
189
1975
205
21111
2228
237
2436
2559
2619
279
83.33% Passive voice overuse
Target: ≤2% passive sentences
passiveCount4
totalSentences64
matches
0"been sealed"
1"been thrown"
2"been interrupted"
3"were curled"
37.40% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount3
totalVerbs123
matches
0"was not pointing"
1"was looking"
2"were breathing"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount6
semicolonCount1
flaggedSentences7
totalSentences79
ratio0.089
matches
0"The station had been sealed since the seventies, according to the briefing — disused, forgotten, the entrance bricked over from the street."
1"His eyes were open, fixed on the curved ceiling, and his face wore an expression Quinn had seen only a handful of times in eighteen years — not pain, not fear exactly, but a kind of arrested astonishment, as though he'd been interrupted mid-thought."
2"Her knees protested; forty-one years and too many cold floors."
3"Old, the brass casing furred with verdigris, the face etched with markings she didn't recognize — not cardinal points but symbols, looping and deliberate."
4"The dust here was thick, undisturbed for decades — except it wasn't."
5"The air there felt wrong — not cold, not warm, but thin, as if she were breathing at altitude."
6"But the thinness in the air, the impossible clean ring, the compass needle trembling toward the dark — it stirred something she'd kept locked down for three years."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount725
adjectiveStacks0
stackExamples(empty)
adverbCount27
adverbRatio0.037241379310344824
lyAdverbCount8
lyAdverbRatio0.011034482758620689
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences79
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences79
mean13.46
std11.56
cv0.859
sampleLengths
017
123
24
318
410
54
622
722
815
910
1022
1110
1210
1322
144
1512
163
1744
184
1917
206
217
2212
232
2410
2518
262
2724
286
2911
304
3166
325
339
344
354
369
3715
3846
3926
402
412
4216
4312
443
4519
461
4717
486
4918
75.95% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats5
diversityRatio0.4936708860759494
totalSentences79
uniqueOpeners39
0.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount0
totalSentences52
matches(empty)
ratio0
50.77% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount22
totalSentences52
matches
0"She held her torch low,"
1"He'd called her at half"
2"She'd noted the fresh mortar"
3"His eyes were open, fixed"
4"He crouched and pointed at"
5"Her knees protested; forty-one years"
6"She drew on a glove"
7"It quivered faintly, aimed down"
8"She was looking at the"
9"She studied the curled fingers"
10"She sat back on her"
11"She crouched again, lower this"
12"They formed a ring around"
13"He did, grumbling, and she"
14"She held her hand a"
15"She had no answer that"
16"She wasn't sure she had"
17"They'd written it up as"
18"she said quietly"
19"She looked at the brass"
ratio0.423
65.77% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount41
totalSentences52
matches
0"The descent into the abandoned"
1"She held her torch low,"
2"The numbers steadied her the"
3"Detective Sergeant Pell stood on"
4"Pell was young, eager, the"
5"He'd called her at half"
6"Quinn stepped over the cracked"
7"The station had been sealed"
8"She'd noted the fresh mortar"
9"Pell said, leading her along"
10"The body lay face-up."
11"His eyes were open, fixed"
12"He crouched and pointed at"
13"The fingers were curled around"
14"A small brass object, green"
15"Her knees protested; forty-one years"
16"She drew on a glove"
17"The needle was not pointing"
18"It quivered faintly, aimed down"
19"Quinn didn't answer at once."
ratio0.788
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences52
matches(empty)
ratio0
91.84% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences28
technicalSentenceCount2
matches
0"His eyes were open, fixed on the curved ceiling, and his face wore an expression Quinn had seen only a handful of times in eighteen years — not pain, not fear e…"
1"The air there felt wrong — not cold, not warm, but thin, as if she were breathing at altitude."
83.33% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags12
uselessAdditionCount1
matches
0"She held, not knowing why"
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags6
fancyCount1
fancyTags
0"she repeated (repeat)"
dialogueSentences29
tagDensity0.207
leniency0.414
rawRatio0.167
effectiveRatio0.069
76.9704%