Run: 2026-05-29-01KSSJRFHQ6NAJMQ63R09X4H7K

Run Details

Duration:
42.9s
Cost:
$0.066750
Provider:
Anthropic

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 call had come in at 4:13 a.m., and by the time Quinn ducked under the tape strung across the mouth of the disused service tunnel beneath Camden, the rain had soaked through the shoulders of her coat. Down here it didn't matter. The air sat thick and motionless, tasting of old iron and something sweeter beneath it, the kind of smell that crawled into the back of the throat and stayed. A uniformed constable held a torch with both hands, the beam shaking against the curved brickwork. "Detective Quinn." He swallowed. "DI Reyes said you'd want this one yourself." "Reyes was right." She crouched at the edge of the scene and let her eyes do the work before her hands ever would. The body lay on its back across the rusted rails, arms folded over the chest in a way no falling man arranged himself. Mid-forties, well-dressed, a tailored grey suit that didn't belong in a tunnel that hadn't seen a train since the Blitz. No blood pooled beneath him. No blood anywhere, in fact, and that was the first thing wrong. "Cause of death?" she asked. "Coroner's not here yet. But there's—" The constable stopped. "Spit it out." "There's no wound, ma'am. Not that we can find. He's just... gone cold." Quinn pulled a pair of nitrile gloves from her pocket and snapped them on. The watch on her left wrist caught the torchlight, the worn leather creasing as she reached toward the dead man's collar. The skin was grey. Not the marbled pallor of a corpse a few hours old but something deeper, the colour leached out of him as though he'd been steeping in cold water for a week. She pressed two fingers to the jaw and tilted the head. No lividity. The blood hadn't settled where gravity told it to. It hadn't settled anywhere. Footsteps echoed down the tunnel behind her, brisk and certain. "You're going to want to step back from that." She knew the voice before she turned. Detective Sergeant Cole, fresh transfer, three weeks on her team and already convinced he understood things she'd spent eighteen years failing to. "Good morning to you too, Cole." He came to a stop beside her, hands jammed in his coat pockets, and looked down at the body with the comfortable confidence of a man reading a story whose ending he already knew. "Overdose. Has to be. Look at the way he's laid out, no struggle, no marks. He took something, lay down, and that was that. Some rich bloke chasing a thrill in the worst part of the city." "Laid himself out with his arms folded." "People do strange things at the end." Quinn rose and walked a slow circle around the corpse, eyes tracking the ground. The dust on the rails told its own story, and the story didn't match Cole's. "Where are his footprints?" "What?" "There's dust on these rails an inch deep. Hasn't been disturbed in decades." She pointed at the long unbroken grey carpet stretching into the dark either side of the body. "If he walked in here and lay down, where are his prints? Where are the constable's? Where are yours?" Cole glanced behind him. Their own tracks ran clear and obvious from the tunnel entrance, scuffed lines in the powder. Around the body itself the dust lay smooth, untouched, as though the man had been set down from above by something that left no weight on the world. "Maybe he came from the other direction," Cole offered. "And cleaned up after himself?" She crouched again, this time at the man's polished shoes. The soles were spotless. No grime, no dust, not so much as a smear of the filth that coated every surface in this place. She'd walked twenty feet from the tape and her own boots had already gone grey to the laces. "He didn't walk here, Cole. He didn't come from any direction at all." "That's not possible." "No," she agreed quietly. "It isn't." She studied the folded hands. The fingers were bare except for one — a thin band of dull metal on the left index finger, etched with marks too small to read in the torchlight. She leaned closer and the sweet smell sharpened, almost floral, almost rot. Something turned over in her memory, three years deep, a smell she'd caught once in a stairwell while Morris bled out beside her under circumstances that no report had ever managed to explain. Her jaw tightened. "Cole. The torch." He handed it over. She angled the beam low across the dead man's chest, and there, where the suit jacket had fallen open, the white shirt was marked. Not with blood. With frost. Delicate ferns of ice traced across the cotton in a pattern that branched and curled like something grown rather than spilled, radiating out from a point over the heart. As she watched, a bead of the ice caught the light and held, refusing to melt in the close warm air of the tunnel. "That's condensation," Cole said. "It's cold down here." "It's eleven degrees down here." She held the back of her gloved hand an inch from the man's chest and felt the cold roll off him like a draught from an open freezer. "Feel that and tell me it's condensation." He didn't move to feel it. His confidence had begun to fray at the edges, and she could hear it in the way he cleared his throat. "So he was kept somewhere cold and dumped. That's a transport problem, not a—" "Not a what?" She looked up at him. "Go on, finish it." "Nothing. I'm saying there's a rational explanation." "There's always a rational explanation, Cole. The trick is being honest about which set of rules you're being rational under." She straightened, knees protesting, and took a slow breath she immediately regretted. The smell coated her tongue. "No prints. No blood. No lividity. Ice that won't melt and a body that won't settle. You want to write 'overdose' on the form, you go ahead. But you'll be the only one who signs it." The frost pattern caught her again. She crouched a final time and traced the branching ice with her eyes, and she saw it then — the way the ferns didn't radiate at random. They curled inward, six lines bending toward a single point, and at the centre, pressed faint into the frozen cotton, a shape. A circle, broken at the bottom. A sigil. She'd seen its cousin once before, etched in brass, on a compass a frightened woman had pressed into her hands and begged her to throw into the Thames. "Cole," she said, and her voice had gone flat and careful. "Get the coroner. And get Eva Kowalski's number from my desk. The researcher at the museum." "A museum researcher? For a body in a tunnel?" Quinn didn't look away from the sigil. The torchlight trembled in her grip, just slightly, and she steadied it with the old discipline that had carried her through eighteen years and one night she never spoke about. "Because this isn't a body in a tunnel," she said. "This is a message. And I've seen the handwriting before."
created_at"2026-05-29T09:58:59.904Z" 5/29/2026, 9:58:59 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2711
moderation_latency(null)
generation_time42894
tokens_prompt1149
tokens_completion1802
native_tokens_prompt1595
native_tokens_completion2351
native_tokens_completion_images(null)
native_tokens_reasoning52
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"
usage0.06675
router(null)
provider_responses
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endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01ATSGNi1GGDY6hs1Qhk3ALK"
is_byokfalse
latency1155
model_permaslug"anthropic/claude-4.8-opus-20260528"
provider_name"Anthropic"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.16.0; linux; x64))"
http_referer(null)
request_id"req-1780048739-C4T5DpxtpD7UAI54SdkO"
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api_type"completions"
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upstream_id"msg_01ATSGNi1GGDY6hs1Qhk3ALK"
total_cost0.06675
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
94.74% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags14
adverbTagCount2
adverbTags
0"She crouched again [again]"
1"she agreed quietly [quietly]"
dialogueSentences38
tagDensity0.368
leniency0.737
rawRatio0.143
effectiveRatio0.105
95.84% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1201
totalAiIsmAdverbs1
found
0
adverb"slightly"
count1
highlights
0"slightly"
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)
62.53% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1201
totalAiIsms9
found
0
word"footsteps"
count1
1
word"echoed"
count1
2
word"comfortable"
count1
3
word"weight"
count1
4
word"etched"
count2
5
word"traced"
count2
6
word"trembled"
count1
highlights
0"footsteps"
1"echoed"
2"comfortable"
3"weight"
4"etched"
5"traced"
6"trembled"
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"managed to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences88
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen38
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1203
ratio0
matches(empty)
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
totalMentions14
wordCount882
uniqueNames7
maxNameDensity0.57
worstName"Cole"
maxWindowNameDensity2
worstWindowName"Cole"
discoveredNames
Quinn4
Camden1
Blitz1
Sergeant1
Cole5
Morris1
Thames1
persons
0"Quinn"
1"Sergeant"
2"Cole"
3"Morris"
places
0"Thames"
globalScore1
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences42
glossingSentenceCount0
matches(empty)
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.831
wordCount1203
matches
0"Not the marbled pallor of a corpse a few hours old but something deeper, the colour leached out of him as though he"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences88
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs42
mean28.64
std25.52
cv0.891
sampleLengths
072
116
212
323
460
55
69
73
813
935
1061
1110
129
1329
146
1571
167
177
1833
191
2049
2148
229
2370
243
256
2679
273
283
2986
308
3140
3241
3312
347
3573
3663
3728
3827
399
4037
4120
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount0
totalSentences64
matches(empty)
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount0
totalVerbs139
matches(empty)
77.92% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount2
semicolonCount0
flaggedSentences2
totalSentences88
ratio0.023
matches
0"The fingers were bare except for one — a thin band of dull metal on the left index finger, etched with marks too small to read in the torchlight."
1"She crouched a final time and traced the branching ice with her eyes, and she saw it then — the way the ferns didn't radiate at random."
94.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount882
adjectiveStacks1
stackExamples
0"long unbroken grey carpet"
adverbCount24
adverbRatio0.027210884353741496
lyAdverbCount3
lyAdverbRatio0.003401360544217687
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences88
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences88
mean13.67
std10.37
cv0.758
sampleLengths
038
15
229
316
44
58
623
723
820
95
1012
115
129
133
1413
1514
1621
174
1831
1911
202
219
224
2310
249
257
2622
276
2834
2937
307
317
3214
3315
344
351
3630
3719
384
3916
4028
419
4215
434
4420
4518
4613
473
484
492
82.58% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats4
diversityRatio0.5227272727272727
totalSentences88
uniqueOpeners46
0.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount0
totalSentences56
matches(empty)
ratio0
48.57% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount24
totalSentences56
matches
0"She crouched at the edge"
1"She pressed two fingers to"
2"It hadn't settled anywhere."
3"She knew the voice before"
4"He came to a stop"
5"She pointed at the long"
6"Their own tracks ran clear"
7"She crouched again, this time"
8"She'd walked twenty feet from"
9"she agreed quietly"
10"She studied the folded hands."
11"She leaned closer and the"
12"Her jaw tightened."
13"He handed it over."
14"She angled the beam low"
15"She held the back of"
16"He didn't move to feel"
17"His confidence had begun to"
18"She looked up at him"
19"She straightened, knees protesting, and"
ratio0.429
49.29% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount46
totalSentences56
matches
0"The call had come in"
1"The air sat thick and"
2"A uniformed constable held a"
3"She crouched at the edge"
4"The body lay on its"
5"The constable stopped"
6"Quinn pulled a pair of"
7"The watch on her left"
8"The skin was grey."
9"She pressed two fingers to"
10"The blood hadn't settled where"
11"It hadn't settled anywhere."
12"Footsteps echoed down the tunnel"
13"She knew the voice before"
14"Detective Sergeant Cole, fresh transfer,"
15"He came to a stop"
16"Quinn rose and walked a"
17"The dust on the rails"
18"She pointed at the long"
19"Cole glanced behind him."
ratio0.821
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences56
matches(empty)
ratio0
23.81% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences30
technicalSentenceCount5
matches
0"The air sat thick and motionless, tasting of old iron and something sweeter beneath it, the kind of smell that crawled into the back of the throat and stayed."
1"Mid-forties, well-dressed, a tailored grey suit that didn't belong in a tunnel that hadn't seen a train since the Blitz."
2"Not the marbled pallor of a corpse a few hours old but something deeper, the colour leached out of him as though he'd been steeping in cold water for a week."
3"Around the body itself the dust lay smooth, untouched, as though the man had been set down from above by something that left no weight on the world."
4"Delicate ferns of ice traced across the cotton in a pattern that branched and curled like something grown rather than spilled, radiating out from a point over t…"
89.29% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags14
uselessAdditionCount1
matches
0"She straightened, knees protesting, and took a slow breath she immediately regretted"
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags5
fancyCount1
fancyTags
0"she agreed quietly (agree)"
dialogueSentences38
tagDensity0.132
leniency0.263
rawRatio0.2
effectiveRatio0.053
83.9518%