Run: 2026-05-31-01KSYXN250BR5BE66MD70AXWW1

Run Details

Duration:
47.0s
Cost:
$0.069425
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 4:17 a.m., and by the time Quinn ducked beneath the police tape strung across the mouth of the abandoned Tube station, the air below Camden had already settled into her lungs like wet ash. Disused stations had a particular smell—rust, stagnant water, the ghost of a century's worth of human breath—but this one carried something underneath that. Something sweet. Something that made the hairs on her forearms lift. She paused on the stairwell and let her torch carve a path through the dark. "Down here, Detective." DC Bashir's voice echoed up the shaft, thin and stretched. "You're going to want to see the platform." Quinn descended. Her boots found each step with the same measured rhythm they'd kept for eighteen years, and her left hand drifted, out of habit, to the worn leather watch on her wrist. 4:41. She noted it the way she noted everything—because the small things were the ones that hanged people, or set them free. The platform opened before her, a long throat of tile gone grey-green with neglect. Two uniformed officers stood near the far wall, shifting their weight, unwilling to look directly at the thing in the centre of the floor. A SOCO crouched beside it in a white suit, camera flashing. The body lay on its back across the platform edge, one arm trailing down toward the tracks. Male, fifties, dressed too well for this place—charcoal overcoat, polished brogues, a signet ring catching the torchlight. No blood. That was the first thing wrong. A man didn't end up dead on the floor of a sealed station without a story, and most stories ended in blood. "Talk to me," Quinn said. Bashir straightened from his crouch. Young, eager, three years on the job and still convinced the world made sense if you stared at it hard enough. "Victim's a Marcus Feld. Antiques dealer, Bloomsbury. Reported missing by his wife yesterday evening." He flipped his notebook closed. "Cause of death looks like cardiac event. No wounds, no defensive marks, no sign of a struggle. My read? He came down here for reasons unknown, heart gave out, end of story." Quinn crouched beside the body. She didn't answer. "Station's been sealed since 1962," Bashir went on. "Gate at the street's padlocked. We had to cut it to get in. So whatever he was doing, he found another way down, had his episode, and—" "How." "Sorry?" "How did he get down here, if the gate was padlocked from the outside?" She lifted Feld's trailing hand with two gloved fingers. The fingertips were clean. No rust, no grime, none of the filth a man would collect clawing his way through a forgotten station in the dark. "He didn't climb through anything. Look at his shoes." Bashir leaned in. The brogues gleamed, the soles barely scuffed. "Maybe he was careful." "Nobody's careful in the pitch black underground." She set the hand down and moved her torch along the platform tiles. Dust lay over everything in a soft, even film—decades of it, undisturbed. Except. She angled the beam low, almost flat against the floor, and the truth resolved out of the grey. There were no footprints leading to the body. None. Not Feld's, not anyone's, save the recent churn of the officers and SOCO clustered around it. The dust beyond their boundary stretched smooth and unbroken in every direction, a clean white sheet pulled taut. "Bashir." Quinn's voice dropped. "How did he get to the middle of the platform without walking across the floor?" The constable opened his mouth. Closed it. "There has to be—the dust shifts. Draughts. Air pressure from the—" "From the trains that haven't run in sixty years." She rose, slow, knees protesting, and turned a full circle. The platform held its silence around her. "A man weighing fifteen stone doesn't lie down in the centre of a sealed room without leaving a single mark of his arrival. So either he fell from above—" She tipped her head back. The ceiling arched smooth and intact, no hatch, no grate. "—or he didn't walk here at all." "You're saying someone carried him." "I'm saying nobody carried him either, because they'd leave prints too." She crouched again, and this time she brought her face close to Feld's collar. The sweet smell intensified—cloying, floral, with a chemical bite beneath it that she'd encountered once before, three years ago, in a place she still saw when she closed her eyes. Her jaw tightened. DS Morris had smelled of exactly this when they'd pulled him out. She pushed the memory down and made herself work. Feld's overcoat had ridden up slightly on the left side. She drew it back with a fingertip and found the inner pocket, and inside it, something small and hard. She extracted it. A brass compass, no bigger than a pocket watch, its casing furred with green verdigris. The face had been etched with markings she didn't recognise—angular sigils, looping script, a band of symbols that swam at the edge of meaning. The needle wasn't pointing north. It was pointing at her chest. And as she shifted, it turned to follow her, then swung away toward the dark mouth of the southbound tunnel and held there, quivering, like a hound straining at a scent. "What is that?" Bashir crowded closer. "Evidence." She bagged it before he could reach for it, sealing the brass thing away in clear plastic, though through the bag she could still feel a faint warmth in it, as though it had been held moments ago rather than carried by a corpse. "Cardiac event doesn't explain why a dead man's compass is still pointing somewhere." "Compasses don't stop because someone dies, Detective." "This one's not pointing at magnetic north. Look." She tilted the bag and the needle swung again, true and deliberate, toward the tunnel. Bashir's expression flickered—the first crack in his tidy little story. Quinn straightened and walked the platform's edge, torch sweeping the tracks below. The smell led her, that sickly floral rot, growing stronger as she neared the tunnel mouth. The dust on the platform stayed pristine. But there, on the lip of the drop where the tiles ended and the dark began, she found it: a single mark. Not a footprint. A long, dragging smear, as though something had been pulled up out of the tunnel and onto the platform without the courtesy of legs. It led straight to the body. And it came from below. "Bashir." She kept her torch fixed on the smear, on the dark beyond it where the rails ran off into nothing. "Tell me again how a man with clean shoes walked into a sealed station." The constable said nothing. Behind her, one of the uniforms shifted, and the sound of his boot in the dust was very loud. Quinn crouched at the platform's edge and aimed her light down the tunnel's throat. The beam died twenty feet in, swallowed whole, and from somewhere in that swallowed dark the sweet smell rolled toward her, patient, waiting. She'd smelled it the night she lost Morris. She knew now she hadn't imagined it then.
created_at"2026-05-31T11:45:34.381Z" 5/31/2026, 11:45:34 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3324
moderation_latency(null)
generation_time46990
tokens_prompt1149
tokens_completion1863
native_tokens_prompt1595
native_tokens_completion2458
native_tokens_completion_images(null)
native_tokens_reasoning67
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"
usage0.069425
router(null)
provider_responses
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endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01KFHmQ28KixWdM8aeot55rf"
is_byokfalse
latency1122
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-1780227934-8jShkx7NEOcaXlC2aBb2"
session_id(null)
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api_type"completions"
id"gen-1780227934-OYHPSCcKzvMkS6yBx2JR"
upstream_id"msg_01KFHmQ28KixWdM8aeot55rf"
total_cost0.069425
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"
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Evaluation details

Result Evaluator Details Meta Data
100.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags15
adverbTagCount1
adverbTags
0"She crouched again [again]"
dialogueSentences28
tagDensity0.536
leniency1
rawRatio0.067
effectiveRatio0.067
91.68% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1202
totalAiIsmAdverbs2
found
0
adverb"slightly"
count1
1
adverb"very"
count1
highlights
0"slightly"
1"very"
80.00% AI-ism character names
Target: 0 AI-default names (17 tracked, −20% each)
codexExemptions(empty)
found
0"Marcus"
100.00% AI-ism location names
Target: 0 AI-default location names (33 tracked, −20% each)
codexExemptions(empty)
found(empty)
54.24% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1202
totalAiIsms11
found
0
word"echoed"
count1
1
word"measured"
count1
2
word"weight"
count1
3
word"resolved"
count1
4
word"churn"
count1
5
word"silence"
count1
6
word"etched"
count1
7
word"warmth"
count1
8
word"magnetic"
count1
9
word"flickered"
count1
10
word"pristine"
count1
highlights
0"echoed"
1"measured"
2"weight"
3"resolved"
4"churn"
5"silence"
6"etched"
7"warmth"
8"magnetic"
9"flickered"
10"pristine"
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
narrationSentences78
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount2
hedgeCount0
narrationSentences78
filterMatches
0"watch"
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences91
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen45
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1192
ratio0
matches(empty)
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
totalMentions22
wordCount935
uniqueNames7
maxNameDensity0.75
worstName"Quinn"
maxWindowNameDensity1.5
worstWindowName"Quinn"
discoveredNames
Quinn7
Tube1
Camden1
Bashir6
Feld4
Dust1
Morris2
persons
0"Quinn"
1"Camden"
2"Bashir"
3"Feld"
4"Morris"
places
0"Dust"
globalScore1
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences53
glossingSentenceCount0
matches(empty)
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1192
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences91
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs38
mean31.37
std23.21
cv0.74
sampleLengths
074
115
221
355
449
564
65
726
851
98
1035
111
121
1358
1410
154
1651
178
1835
1919
2018
2177
225
2358
2412
2541
2644
2737
286
2958
307
3133
3284
3311
3435
3523
3637
3716
91.77% Passive voice overuse
Target: ≤2% passive sentences
passiveCount3
totalSentences78
matches
0"been etched"
1"been held"
2"been pulled"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount2
totalVerbs149
matches
0"wasn't pointing"
1"was pointing"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount9
semicolonCount0
flaggedSentences8
totalSentences91
ratio0.088
matches
0"Disused stations had a particular smell—rust, stagnant water, the ghost of a century's worth of human breath—but this one carried something underneath that."
1"She noted it the way she noted everything—because the small things were the ones that hanged people, or set them free."
2"Male, fifties, dressed too well for this place—charcoal overcoat, polished brogues, a signet ring catching the torchlight."
3"Dust lay over everything in a soft, even film—decades of it, undisturbed."
4"\"—or he didn't walk here at all.\""
5"The sweet smell intensified—cloying, floral, with a chemical bite beneath it that she'd encountered once before, three years ago, in a place she still saw when she closed her eyes."
6"The face had been etched with markings she didn't recognise—angular sigils, looping script, a band of symbols that swam at the edge of meaning."
7"Bashir's expression flickered—the first crack in his tidy little story."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount545
adjectiveStacks0
stackExamples(empty)
adverbCount13
adverbRatio0.023853211009174313
lyAdverbCount2
lyAdverbRatio0.003669724770642202
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences91
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences91
mean13.1
std9.61
cv0.733
sampleLengths
040
123
22
39
415
513
68
72
831
91
1021
1114
1224
1311
1417
1517
162
176
1822
195
205
2121
2219
2332
245
253
268
2727
281
291
3023
314
3222
339
343
357
364
3720
3812
391
4018
418
421
4316
4418
454
4615
475
482
4911
79.63% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats5
diversityRatio0.5111111111111111
totalSentences90
uniqueOpeners46
0.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount0
totalSentences70
matches(empty)
ratio0
94.29% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount22
totalSentences70
matches
0"She paused on the stairwell"
1"Her boots found each step"
2"She noted it the way"
3"He flipped his notebook closed"
4"She didn't answer."
5"She lifted Feld's trailing hand"
6"She set the hand down"
7"She angled the beam low,"
8"She rose, slow, knees protesting,"
9"She tipped her head back"
10"She crouched again, and this"
11"Her jaw tightened."
12"She pushed the memory down"
13"She drew it back with"
14"She extracted it."
15"It was pointing at her"
16"She bagged it before he"
17"She tilted the bag and"
18"It led straight to the"
19"She kept her torch fixed"
ratio0.314
45.71% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount58
totalSentences70
matches
0"The call had come in"
1"Something that made the hairs"
2"She paused on the stairwell"
3"DC Bashir's voice echoed up"
4"Her boots found each step"
5"She noted it the way"
6"The platform opened before her,"
7"A SOCO crouched beside it"
8"The body lay on its"
9"That was the first thing"
10"A man didn't end up"
11"Bashir straightened from his crouch."
12"He flipped his notebook closed"
13"Quinn crouched beside the body."
14"She didn't answer."
15"Bashir went on"
16"She lifted Feld's trailing hand"
17"The fingertips were clean."
18"Bashir leaned in."
19"The brogues gleamed, the soles"
ratio0.829
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences70
matches(empty)
ratio0
99.57% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences33
technicalSentenceCount2
matches
0"Two uniformed officers stood near the far wall, shifting their weight, unwilling to look directly at the thing in the centre of the floor."
1"The face had been etched with markings she didn't recognise—angular sigils, looping script, a band of symbols that swam at the edge of meaning."
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags15
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags2
fancyCount1
fancyTags
0"slow knees protesting (protest)"
dialogueSentences28
tagDensity0.071
leniency0.143
rawRatio0.5
effectiveRatio0.071
84.5629%