Run: 2026-05-31-01KSYXDAKZ5F6N48Y0X7CTB09P

Run Details

Duration:
39.7s
Cost:
$0.059675
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 came in at 4:17 a.m., and by the time Quinn ducked under the tape strung across the mouth of the disused Tube station, the rain had soaked through her coat to the lining. Camden never slept, but this corner of it had been dead for decades. The station entrance gaped between a shuttered kebab shop and a wall of fly-posted advertisements, its tiled archway crusted with grime. A uniformed constable stood guard with the slack posture of a man who'd been on his feet too long. "Detective Quinn." He straightened. "DS Patel's already down on the platform." "Who found the body?" "Anonymous tip. Came through the non-emergency line about an hour ago. Male voice, no callback number." Quinn paused with one hand on the cold steel of the railing. "Anonymous tip leads us to a sealed station that's been bricked up since the eighties." "Council opened it three weeks back. Survey work. The hoarding's still up out front, but the gate's—" "The gate's what?" "Cut. Padlock's on the ground. Bolt cutters, looks like." She filed that away and descended. The stairwell smelled of standing water and something fainter beneath it, a sweetness that turned her stomach. Emergency lamps had been rigged along the steps, throwing long shadows that pooled in the corners where the tile gave way to bare brick. Her watch caught the light as she steadied herself, the worn leather strap dark with rain. Patel was crouched at the platform's edge, gloved and absorbed, a younger detective with a habit of arriving at conclusions before the evidence had finished speaking. "Tell me what I'm looking at," Quinn said. "Robbery gone wrong." He didn't look up. "Vagrant, probably. The station's been a known doss for the homeless since the council reopened it. Two of them squabble over a sleeping spot, one of them ends up dead. Blunt force, back of the skull." Quinn knelt beside the body. Male, fifties, well-built. He lay on his side, one arm flung above his head, the other tucked beneath his chest. A dark halo spread across the platform beneath his ear. She studied the face first. Clean-shaven. The fingernails, when she lifted the loose hand, were trimmed and clean. No grime in the creases of the knuckles. The shoes were leather, good ones, the soles barely scuffed. "This man hasn't slept rough a night in his life," she said. "Maybe he came down to score. The market types use these old stations." "Which market types?" Patel's jaw tightened. He'd said too much, and they both knew it. "Drug dealers. Squatters. You know what I mean." Quinn did not know what he meant, but she let it pass for now and turned back to the body. The blood beneath the head had begun to congeal at the edges, dark and tacky, but the centre still held a wet sheen. She pressed two fingers to the platform near the spreading stain. The concrete was cold. The blood was colder. "How long does the coroner think he's been down here?" "Couple hours, give or take. Lividity's still settling." She frowned. The pool was wrong. A blow to the back of the skull would send blood downward, gravity drawing it along the slope of the platform toward the track. But the stain didn't run that way. It spread outward in even spokes, like spilled ink, like something drawn rather than poured. And there at the margin, where the blood met the dust, the edge had crystallised into faint geometric lines, too clean to be natural. She leaned closer. The pattern resolved itself. A circle, broken at four points, with smaller marks ringing the centre. The body lay at its heart. "Patel. Bring the lamp." He shifted the light. The shadows retreated, and the design beneath the dead man bloomed full into view, traced not in blood alone but in something that glittered faintly, a fine grey powder ground into the concrete. "Salt," Quinn said. "And iron filings, if I had to guess." "So somebody played at being clever. Doesn't change what happened." "It changes everything." She rose, knees protesting, and walked a slow circle around the corpse. "Look at the dust on this platform. Undisturbed everywhere except a single track of footprints leading in." She pointed. "His. Size eleven, those leather soles. They come from the stairs, straight to the centre of that circle, and they stop." "And the killer?" "There are no other prints." She let that settle. "No drag marks. No scuffle. A man doesn't take a blow to the back of the head while standing perfectly still in the middle of a salt circle and leave the dust around him pristine." Patel stood, the lamp wavering in his grip. "You're saying somebody staged it." "I'm saying the staging is the only honest thing down here." Quinn crouched again and gently lifted the tucked arm. The fingers had closed around something. She worked it free. A small brass compass lay in her palm, its casing green with age, the face etched with markings that were not points of a compass at all but symbols she half recognised from a place she'd spent three years trying to forget. The needle spun once, twice, then steadied — pointing not north but toward the black mouth of the tunnel beyond the platform's end. The sweetness in the air thickened. Quinn felt the hairs rise along her forearms. "What is that?" Patel's voice had lost its certainty. "You tell me. You're the one who knew which market types use these stations." She turned the compass over. On the reverse, scratched faint into the verdigris, were three letters. M-O-R. She stopped breathing. The rest was worn away, but she didn't need it. Morris. Her partner's name, or the start of it, on an object that should not exist, in the hand of a man who'd walked into a sealed station, stepped into a ring of salt, and died without a single mark to show who'd killed him. "Detective?" Patel said. "You've gone pale." She closed her fist around the compass and stood, her gaze tracking the needle's pull toward the dark. "This isn't a robbery," she said. "And whoever called it in wanted us to find exactly this."
created_at"2026-05-31T11:41:20.908Z" 5/31/2026, 11:41:20 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2695
moderation_latency(null)
generation_time39647
tokens_prompt1149
tokens_completion1602
native_tokens_prompt1595
native_tokens_completion2068
native_tokens_completion_images(null)
native_tokens_reasoning41
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"
usage0.059675
router(null)
provider_responses
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endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01Hpr3eVRdx4VG3HdD3BXoNU"
is_byokfalse
latency1175
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-1780227680-qkCVV6c5bWrGqPcXLwP6"
session_id(null)
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api_type"completions"
id"gen-1780227680-Mx5DNnZ8DTOiGlGMBQmN"
upstream_id"msg_01Hpr3eVRdx4VG3HdD3BXoNU"
total_cost0.059675
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags13
adverbTagCount1
adverbTags
0"Quinn crouched again [again]"
dialogueSentences35
tagDensity0.371
leniency0.743
rawRatio0.077
effectiveRatio0.057
90.38% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1039
totalAiIsmAdverbs2
found
0
adverb"perfectly"
count1
1
adverb"gently"
count1
highlights
0"perfectly"
1"gently"
80.00% AI-ism character names
Target: 0 AI-default names (17 tracked, −20% each)
codexExemptions(empty)
found
0"Patel"
100.00% AI-ism location names
Target: 0 AI-default location names (33 tracked, −20% each)
codexExemptions(empty)
found(empty)
71.13% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1039
totalAiIsms6
found
0
word"stomach"
count1
1
word"resolved"
count1
2
word"traced"
count1
3
word"pristine"
count1
4
word"wavering"
count1
5
word"etched"
count1
highlights
0"stomach"
1"resolved"
2"traced"
3"pristine"
4"wavering"
5"etched"
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
narrationSentences65
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount1
hedgeCount0
narrationSentences65
filterMatches
0"watch"
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences87
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen44
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1040
ratio0
matches(empty)
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions12
unquotedAttributions0
matches(empty)
93.74% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions14
wordCount711
uniqueNames3
maxNameDensity1.13
worstName"Quinn"
maxWindowNameDensity2
worstWindowName"Quinn"
discoveredNames
Quinn8
Tube1
Patel5
persons
0"Quinn"
1"Patel"
places(empty)
globalScore0.937
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences39
glossingSentenceCount0
matches(empty)
0.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches3
per1kWords2.885
wordCount1040
matches
0"not in blood alone but in something"
1"not points of a compass at all but symbols she half recognised from a place she'd spent three y"
2"not north but toward the black mouth of the tunnel beyond the platform's e"
90.04% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount2
totalSentences87
matches
0"run that way"
1"let that settle"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs40
mean26
std22.04
cv0.848
sampleLengths
035
153
211
34
416
527
617
73
89
963
1026
118
1243
1335
1436
1512
1613
173
1820
1962
2010
218
2276
2325
244
2537
2611
2710
2855
293
3044
3113
3230
3365
3414
359
3689
376
3818
3917
89.07% Passive voice overuse
Target: ≤2% passive sentences
passiveCount3
totalSentences65
matches
0"been rigged"
1"was crouched"
2"was worn"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount0
totalVerbs125
matches(empty)
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount1
semicolonCount0
flaggedSentences1
totalSentences87
ratio0.011
matches
0"The needle spun once, twice, then steadied — pointing not north but toward the black mouth of the tunnel beyond the platform's end."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount713
adjectiveStacks0
stackExamples(empty)
adverbCount21
adverbRatio0.029453015427769985
lyAdverbCount4
lyAdverbRatio0.005610098176718092
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences87
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences87
mean11.95
std9.53
cv0.797
sampleLengths
035
113
221
319
44
57
64
716
812
915
1017
113
129
136
1417
1524
1616
1726
188
197
2036
215
223
2317
2410
255
261
2712
288
2910
3012
3113
323
333
349
358
3620
3723
3811
394
404
4110
428
432
444
4524
467
4715
4824
493
76.25% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats2
diversityRatio0.47126436781609193
totalSentences87
uniqueOpeners41
0.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount0
totalSentences54
matches(empty)
ratio0
94.07% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount17
totalSentences54
matches
0"She filed that away and"
1"Her watch caught the light"
2"He didn't look up"
3"He lay on his side,"
4"She studied the face first."
5"He'd said too much, and"
6"She pressed two fingers to"
7"It spread outward in even"
8"She leaned closer."
9"He shifted the light."
10"She rose, knees protesting, and"
11"She let that settle"
12"She worked it free."
13"She turned the compass over"
14"She stopped breathing."
15"Her partner's name, or the"
16"She closed her fist around"
ratio0.315
6.30% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount49
totalSentences54
matches
0"The call came in at"
1"Camden never slept, but this"
2"The station entrance gaped between"
3"A uniformed constable stood guard"
4"Quinn paused with one hand"
5"She filed that away and"
6"The stairwell smelled of standing"
7"Emergency lamps had been rigged"
8"Her watch caught the light"
9"Patel was crouched at the"
10"He didn't look up"
11"Quinn knelt beside the body."
12"He lay on his side,"
13"A dark halo spread across"
14"She studied the face first."
15"The fingernails, when she lifted"
16"The shoes were leather, good"
17"Patel's jaw tightened."
18"He'd said too much, and"
19"Quinn did not know what"
ratio0.907
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences54
matches(empty)
ratio0
0.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences27
technicalSentenceCount6
matches
0"A uniformed constable stood guard with the slack posture of a man who'd been on his feet too long."
1"The stairwell smelled of standing water and something fainter beneath it, a sweetness that turned her stomach."
2"Emergency lamps had been rigged along the steps, throwing long shadows that pooled in the corners where the tile gave way to bare brick."
3"The shadows retreated, and the design beneath the dead man bloomed full into view, traced not in blood alone but in something that glittered faintly, a fine gre…"
4"A small brass compass lay in her palm, its casing green with age, the face etched with markings that were not points of a compass at all but symbols she half re…"
5"Her partner's name, or the start of it, on an object that should not exist, in the hand of a man who'd walked into a sealed station, stepped into a ring of salt…"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags13
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags6
fancyCount1
fancyTags
0"She rose knees protesting (protest)"
dialogueSentences35
tagDensity0.171
leniency0.343
rawRatio0.167
effectiveRatio0.057
79.6988%