Run: 2026-09-29-01M3P2GW17F5ER7PE55JESZJB8

Run Details

Duration:
39.2s
Cost:
$0.041044
Provider:
Claude Platform on AWS

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 Tube station had no name anymore. Someone had pried the enamel sign from the wall decades ago, and all that remained was a pale rectangle in the grime where it had hung. Detective Harlow Quinn descended the last of the service stairs with her torch angled low and her left hand resting on the worn leather strap of her watch, a habit she'd never managed to break. Forty feet below Camden High Street, the air tasted of cold iron and something sweeter underneath. Burnt sugar, maybe. Cloves. Floodlights had been rigged along the platform, and they made the place look like a stage set. Tiled walls the color of old teeth. A curved ceiling furred with soot. At the far end, where the platform dropped to the tracks, a body lay on its back with one arm flung out, as though reaching for something. "Guv." DS Adeyemi came toward her, notebook already open, paper suit rustling. He was thirty-four and tidy and still believed the simplest answer was usually correct. Quinn liked him for it, and she distrusted it in him. "Male, fifties. No ID on him yet. Urban explorers found him at six this morning. They're upstairs with a PC, very sorry for themselves." "Cause?" "Looks like a fall." He pointed with his pen at the iron stairwell at the platform's north end. "Steep, rusted, half the treads missing. He went down badly, hit his head on the edge of the platform. There's blood on the tile. Add the drink." He nodded toward a scatter of small glass vials by the body's hand. "Whatever was in those, it's not legal. Some kind of squat party that went bad, and everyone else cleared off when he stopped moving." Quinn said nothing. She crouched at the edge of the taped-off area and looked at the floor rather than the body. She had learned that early. Bodies told you what had happened to them. Floors told you what everyone else had done. The dust on the platform lay thick as felt, gray and undisturbed along the walls. But down the center ran a broad swept lane, six feet wide, as though a great many people had crossed it and someone had come after them with a broom. The sweeping was neat. Deliberate. It began at the mouth of the east tunnel and ended a yard short of the body. "Your squat party," she said. "How many people?" Adeyemi hesitated. "Fair few, I'd say." "Then where are their footprints?" "Swept up. Or scuffed out." "Scuffed out doesn't leave edges like that." She pointed with her pen. "That's a push broom. Someone tidied the whole route, then stopped ten feet from the corpse. Why stop?" "Ran out of time?" "Or didn't dare go closer." She rose, knees clicking, and stepped around the tape to the body itself. He was well dressed for a man who supposedly died at a drug party. Charcoal overcoat, good wool, a silk scarf tucked neatly at the throat. His shoes were oxfords with a recent polish, and the soles were clean. Quinn bent and looked at them for a long moment. No dust. No soot. Not so much as a smear of the black grease that coated every surface in this place. He had not walked down those stairs. "Sergeant. Look at his shoes." Adeyemi looked. "Clean." "He fell down a stairwell and the fall didn't dirty his shoes. He walked across a platform and left no prints. Either he was carried here, or he arrived some other way." "Carried, then. Dumped." "Then whoever carried him was very careful about their own feet and careless about everything else." She lifted the man's wrist with two gloved fingers. The watch on it was a good steel dress piece, its crystal intact. The hands stood at ten past two. "Lividity?" "Doc's estimate is between midnight and two. He hasn't done the liver temp yet." "Then the watch stopped at about the right time. Which is convenient, if he fell." She turned the wrist over. The band was unmarked, the crystal unscratched. "A man who tumbles down an iron stairwell doesn't come away with an unscratched watch. And the blood on the tile..." She looked at it. "Where's the wound?" Adeyemi crouched beside her. He was quiet for several seconds. "Back of the skull. There." He pointed. "Then why is the blood on the platform edge, three feet from the back of his skull? There's no smear, no drag. It's pooled and dry. It's a puddle, Sergeant. Someone put it there." "You're saying it's staged." "I'm saying it's decoration." She surprised herself with the word, but it was the right one. Everything here had the feel of something arranged for a viewer. The vials, the blood, the stairwell that everyone was meant to look at. "What's in his pockets?" "Haven't touched them. Wanted you to see him first." She went through the coat with slow, steady hands. Left pocket: a handkerchief, monogrammed, the initials worn away by years of washing. Right pocket: a folded slip of buff paper. She opened it under the floodlight. It was a reader's ticket, typed, stamped with the crest of the British Museum. RESTRICTED ARCHIVES — DAY ACCESS. Beneath the date, in a small round hand, a sponsor's signature: *E. Kowalski.* Quinn read it twice. The name pricked at her memory and held on. She folded the paper away into an evidence bag without comment. Inside the coat's breast pocket she found two more things. The first was a disk of yellowed bone, palm-sized, drilled through the center and carved on one face with a spiral of tiny markings. It was cool against her glove, and cooler than it should have been, as though it had lain on ice. The second was a compass. It was a small brass thing, the casing crusted green with verdigris. The glass was clear, and the face beneath was etched with sigils so fine she had to tilt it toward the light to see them. Not letters. Not any alphabet she knew. Wards of some kind, folded in on one another like the whorls of a fingerprint. The needle was spinning. Not wildly. It turned with a slow, considering sweep, like a dog casting for a scent. She held the compass flat on her palm, and the needle slowed, wavered, and settled. It pointed past the body, past the taped edge of the platform, to the blank tiled wall at the far end. "Odd," Adeyemi said, leaning over her shoulder. "Magnetic fault, probably. All the cables down here." "Probably." Quinn walked toward the wall, and the needle followed the angle of her body, steady as a plumb line. When she stopped six feet from the tiles, it quivered and strained forward. She took a step to the left. It swung left. It was not pointing at the wall at all, but through it. She thought, unbidden, of Morris. Of the last night, and the door that hadn't been a door. She pushed the thought back down where she kept it. Up close, the wall wasn't right either. The tiles were the same dirty cream as the rest, but the grout between them was clean. No soot in the seams. The dust at its base had been swept in a neat crescent, the way a floor is swept before a door swings open across it. "Sergeant." Her voice came out level. "Get the photographer to shoot this wall from every angle. Get a fingertip search on the tiles, especially anything raised or loose. And I want everyone in this station accounted for by name. Nobody leaves without giving a statement, including our urban explorers." "Guv, it's a fall. A bad night. With respect—" "With respect, Adeyemi, a man doesn't fall down stairs he never climbed. He doesn't bleed on the wrong side of his own head. And a crowd doesn't sweep the floor behind it and forget the one thing that matters." She closed her fingers around the compass, feeling the small, insistent tug of the needle against her palm. "This was a gathering. Something happened here last night, something with a lot of people, and someone has worked very hard to make it look like nothing." He was quiet a moment, then closed his notebook. "Who was he, do you think?" Quinn looked down at the reader's ticket through its plastic sleeve. Then back at the wall, and the clean grout, and the compass straining toward whatever lay beyond. "I don't know yet," she said. "But I'd like to meet the woman who signed for him."
created_at"2026-09-29T07:54:28.268Z" 9/29/2026, 7:54:28 AM
model"anthropic/claude-sonnet-5.5-20260928"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4009
moderation_latency(null)
generation_time39142
tokens_prompt896
tokens_completion2398
native_tokens_prompt1287
native_tokens_completion3847
native_tokens_completion_images(null)
native_tokens_reasoning1083
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"
usage0.041044
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790668468-XHvnyOvIxwHc9lqBLpUM"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790668468-vI31ziIOWktDb9PiuEJu"
upstream_id"msg_011CfXNSqGWuZh9pdBvK5GeF"
provider_responses
0
endpoint_id"99aaad94-923b-4fc1-b763-271ed5486f7a"
id"msg_011CfXNSqGWuZh9pdBvK5GeF"
is_byokfalse
latency795
model_permaslug"anthropic/claude-sonnet-5.5-20260928"
provider_name"Claude Platform on AWS"
status200
total_cost0.041044
cache_discount(null)
upstream_inference_cost0
provider_name"Claude Platform on AWS"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

Evaluation details

Result Evaluator Details Meta Data
100.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags16
adverbTagCount0
adverbTags(empty)
dialogueSentences42
tagDensity0.381
leniency0.762
rawRatio0
effectiveRatio0
89.55% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1435
totalAiIsmAdverbs3
found
0
adverb"very"
count3
highlights
0"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)
75.61% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1435
totalAiIsms7
found
0
word"silk"
count1
1
word"crystal"
count2
2
word"etched"
count1
3
word"wavered"
count1
4
word"magnetic"
count1
5
word"quivered"
count1
highlights
0"silk"
1"crystal"
2"etched"
3"wavered"
4"magnetic"
5"quivered"
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
narrationSentences94
matches(empty)
82.07% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount2
hedgeCount2
narrationSentences94
filterMatches
0"watch"
1"look"
hedgeMatches
0"managed to"
1"happened to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences120
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen57
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans1
markdownWords2
totalWords1436
ratio0.001
matches
0"E. Kowalski."
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions7
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions20
wordCount980
uniqueNames10
maxNameDensity0.71
worstName"Quinn"
maxWindowNameDensity1.5
worstWindowName"Quinn"
discoveredNames
Tube1
Harlow1
Quinn7
Camden1
High1
Street1
Adeyemi5
British1
Museum1
Morris1
persons
0"Harlow"
1"Quinn"
2"Adeyemi"
3"Morris"
places
0"Camden"
1"High"
2"Street"
globalScore1
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences65
glossingSentenceCount1
matches
0"as though reaching for something"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.696
wordCount1436
matches
0"not pointing at the wall at all, but through it"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences120
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs43
mean33.4
std26.21
cv0.785
sampleLengths
088
157
261
31
482
542
667
78
86
95
105
1130
124
1318
1477
155
163
1732
183
1946
2014
2155
2217
2334
244
2544
269
2768
2824
2959
3059
314
3252
3315
3455
3527
3654
3749
389
3984
4015
4128
4217
86.60% Passive voice overuse
Target: ≤2% passive sentences
passiveCount5
totalSentences94
matches
0"been rigged"
1"was unmarked"
2"was meant"
3"was etched"
4"been swept"
5"is swept"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount2
totalVerbs155
matches
0"was spinning"
1"was not pointing"
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount1
semicolonCount0
flaggedSentences1
totalSentences120
ratio0.008
matches
0"RESTRICTED ARCHIVES — DAY ACCESS."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount982
adjectiveStacks0
stackExamples(empty)
adverbCount23
adverbRatio0.023421588594704685
lyAdverbCount5
lyAdverbRatio0.0050916496945010185
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences120
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences120
mean11.97
std9.69
cv0.81
sampleLengths
07
126
235
316
43
51
617
77
86
927
1012
1114
1211
1324
141
1518
1640
1724
183
1918
205
218
228
2315
2430
254
261
2717
285
293
302
314
325
335
3412
3518
364
3718
3814
3912
4013
4110
422
432
4417
457
465
472
481
4932
88.89% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats5
diversityRatio0.5583333333333333
totalSentences120
uniqueOpeners67
40.65% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount1
totalSentences82
matches
0"Then back at the wall,"
ratio0.012
59.02% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount33
totalSentences82
matches
0"He was thirty-four and tidy"
1"He pointed with his pen"
2"He nodded toward a scatter"
3"She crouched at the edge"
4"She had learned that early."
5"It began at the mouth"
6"She pointed with her pen"
7"She rose, knees clicking, and"
8"He was well dressed for"
9"His shoes were oxfords with"
10"He had not walked down"
11"She lifted the man's wrist"
12"She turned the wrist over"
13"She looked at it"
14"He was quiet for several"
15"She surprised herself with the"
16"She went through the coat"
17"She opened it under the"
18"It was a reader's ticket,"
19"She folded the paper away"
ratio0.402
63.66% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount65
totalSentences82
matches
0"The Tube station had no"
1"Someone had pried the enamel"
2"Detective Harlow Quinn descended the"
3"Floodlights had been rigged along"
4"A curved ceiling furred with"
5"DS Adeyemi came toward her,"
6"He was thirty-four and tidy"
7"Quinn liked him for it,"
8"He pointed with his pen"
9"He nodded toward a scatter"
10"Quinn said nothing."
11"She crouched at the edge"
12"She had learned that early."
13"Bodies told you what had"
14"Floors told you what everyone"
15"The dust on the platform"
16"The sweeping was neat."
17"It began at the mouth"
18"She pointed with her pen"
19"She rose, knees clicking, and"
ratio0.793
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences82
matches(empty)
ratio0
100.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences40
technicalSentenceCount1
matches
0"But down the center ran a broad swept lane, six feet wide, as though a great many people had crossed it and someone had come after them with a broom."
93.75% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags16
uselessAdditionCount1
matches
0"Quinn walked, and the needle followed the angle of her body, steady as a plumb line"
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags3
fancyCount0
fancyTags(empty)
dialogueSentences42
tagDensity0.071
leniency0.143
rawRatio0
effectiveRatio0
89.3265%