Run: 2026-06-01-01KT1H3A0637BCF92Z0NW88T6D

Run Details

Duration:
41.0s
Cost:
$0.063475
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 abandoned Tube station beneath Camden smelled of rust and something sweeter underneath, like fruit left to rot in a sealed room. Detective Harlow Quinn ducked under the strip of police tape and descended the stairs, her torch beam cutting through dust that hung suspended in the dead air. Three years on the force had taught her that crime scenes had a rhythm. The murmur of forensics. The crackle of radios. The shuffle of paper booties on concrete. This one had none of it. "Ma'am." A uniformed officer met her at the bottom, his face pale beneath the harsh portable lamps. "DS Pike's already inside. Through the old ticket hall." "Time of the call?" "Twenty-three forty. Maintenance crew found the body. They weren't meant to be down here, but—" "But people never are." Quinn moved past him. The ticket hall opened up before her, a cathedral of cracked tile and shadow. Decades of graffiti layered the walls, and the old turnstiles stood frozen mid-rotation, brass gone green with age. At the centre of it all, DS Pike crouched over the body. "Quinn." He didn't look up. "Wasn't expecting you. Thought this was mine." "It was. Now it's ours." She crossed the space, her boots disturbing a thin film of dust that hadn't been disturbed in years. That was the first thing wrong. "Walk me through it." "Male, mid-forties. No ID. Looks like he came down here, had a heart attack, fell." Pike rose, brushing his knees. "Coroner's en route. Open and shut, if you ask me." "I didn't." She knelt beside the body. The man lay on his back, one arm flung above his head, the other folded across his chest. His eyes were open, fixed on the vaulted ceiling. His skin had taken on a waxen sheen, and his lips had pulled back from his teeth in something that wasn't quite a grimace. "Heart attack," she repeated. "His face. The pain. Classic cardiac event." Quinn shone her torch along the body's length, slow, methodical. The man wore a wool coat, good quality, the kind that cost more than a maintenance worker made in a month. His shoes were polished leather. No scuffs. No dirt on the soles. "Pike. How did he get here?" "Walked, presumably." "Through that?" She nodded toward the staircase, the carpet of dust, the single set of footprints — hers, and the officer's, and Pike's. "Where are his tracks?" Pike's mouth opened. Closed. "Maintenance crew might've disturbed them. Lot of foot traffic when they found him." "The dust around the body is undisturbed for two feet in every direction." She traced the edge of the clean radius with her torch. "No drag marks. No scuffs. He didn't walk here, and nobody carried him." She paused. "He arrived." "That's not possible." "No." She studied the waxen face. "It isn't." She leaned closer. The sweet smell intensified near his collar — not decomposition, something else. Floral and metallic at once. She'd smelled it before, three years ago, in a warehouse in Deptford, the night DS Morris stopped answering his radio. The night she'd found his car running, his coffee still warm, and no Morris at all. The memory tightened something behind her sternum. "Quinn?" Pike's voice came from somewhere far off. "You've gone grey." "His hand." She pointed. "The one on his chest. Lift the fingers." Pike hesitated, then crouched and peeled back the dead man's fingers with a gloved hand. Beneath the curled palm sat a small object, dark and rounded, the size of a coin but thicker. "What is that?" Pike held it up to the light. "Bone? Looks carved." Quinn took it from him, turning it over. A token, yellowed, etched with markings she didn't recognise — and yet some animal part of her did, the same part that had screamed at her in that Deptford warehouse to run. The token was warm. It shouldn't have been. The man had been dead for hours, and stone-cold concrete pressed against him on every side, but the token pulsed with a faint, fevered heat against her palm. "Bag it," she said, and dropped it into the evidence pouch Pike held out. Her fingers wanted to keep holding it. She made them let go. "So he had a weird keepsake. Doesn't change cause of death." "Look at his eyes." Pike crouched again, reluctant. "What about them?" "The pupils. Both fully dilated. But there's no haemorrhaging, no petechiae. A cardiac event under terror — you'd expect some sign of it in the eyes. The capillaries." She moved her torch in a slow arc across his face. "And the frost." "There's no—" "On his eyelashes." She held the beam steady. Fine crystals clung to the lashes, catching the light like sugar. "It's fourteen degrees down here. Warm for November. So why is he frozen from the inside out while the rest of him's gone soft?" Pike said nothing. Quinn stood and walked a slow circuit around the body, reading the floor the way she'd read a hundred floors before. The clean radius. The undisturbed dust. And there — at the edge of the circle, faint enough to miss if you weren't looking — a scorched line, thin as thread, scribed into the concrete. It curved away from the body in an arc. She followed it with her eyes and found it joined another, and another, until the pattern resolved. A circle. The man lay at the centre of a circle drawn into the floor, the lines so fine they vanished under dust unless the torch caught them at the right angle. "Pike. Come look at this." He came, and stopped, and she watched his face change as he saw it. "That's — somebody drew that. Recently." "Somebody drew it, and he sat in the middle of it." She straightened. "He came down here on purpose. Alone. He brought that token. He sat in this circle. And then something happened to him that left no marks, no tracks, and froze his eyes while his heart gave out." She turned to Pike. "Still want to write 'cardiac event'?" Pike's jaw worked. "Heart attacks don't leave circles, Quinn. People don't just appear in sealed rooms. There's an explanation. A rational one. There has to be." "There's an explanation." She looked back down at the dead man's open, frost-rimed eyes, at the sweet rot in the air, at the warm bone token sealed in plastic in Pike's hand. The thread of cold that had lived in her chest since Deptford uncoiled. "I just don't think you're going to like where it leads."
created_at"2026-06-01T12:03:52.971Z" 6/1/2026, 12:03:52 PM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1234
moderation_latency(null)
generation_time41008
tokens_prompt1149
tokens_completion1635
native_tokens_prompt1595
native_tokens_completion2220
native_tokens_completion_images(null)
native_tokens_reasoning0
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"
usage0.063475
router(null)
provider_responses
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endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01UEefECzWJZPMkMB3xn4w3o"
is_byokfalse
latency1234
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-1780315432-e4Cig8gnU6lUm14o4gBK"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1780315432-14gfxCe0N1XEpMvVl8xD"
upstream_id"msg_01UEefECzWJZPMkMB3xn4w3o"
total_cost0.063475
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
totalTags20
adverbTagCount0
adverbTags(empty)
dialogueSentences48
tagDensity0.417
leniency0.833
rawRatio0
effectiveRatio0
100.00% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1091
totalAiIsmAdverbs0
found(empty)
highlights(empty)
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)
77.09% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1091
totalAiIsms5
found
0
word"methodical"
count1
1
word"traced"
count1
2
word"etched"
count1
3
word"pulsed"
count1
4
word"resolved"
count1
highlights
0"methodical"
1"traced"
2"etched"
3"pulsed"
4"resolved"
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
narrationSentences70
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount0
narrationSentences70
filterMatches(empty)
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences98
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen41
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1098
ratio0
matches(empty)
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions5
unquotedAttributions0
matches(empty)
63.22% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions27
wordCount749
uniqueNames8
maxNameDensity1.74
worstName"Pike"
maxWindowNameDensity3
worstWindowName"Pike"
discoveredNames
Tube1
Camden1
Harlow1
Quinn5
Pike13
Deptford3
Morris2
Fine1
persons
0"Camden"
1"Harlow"
2"Quinn"
3"Pike"
4"Morris"
places(empty)
globalScore0.632
windowScore0.667
89.02% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences41
glossingSentenceCount1
matches
0"quite a grimace"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1098
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences98
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs44
mean24.95
std21.04
cv0.843
sampleLengths
049
129
26
326
44
515
68
744
812
933
1030
117
1251
134
147
1543
166
172
1827
1917
2041
213
228
2363
2411
2512
2633
2713
2876
2926
3011
314
327
3342
342
3543
363
3781
3832
395
4020
4160
4226
4356
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount1
totalSentences70
matches
0"been disturbed"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount1
totalVerbs115
matches
0"weren't looking "
26.24% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount5
semicolonCount0
flaggedSentences4
totalSentences98
ratio0.041
matches
0"\"Through that?\" She nodded toward the staircase, the carpet of dust, the single set of footprints — hers, and the officer's, and Pike's."
1"The sweet smell intensified near his collar — not decomposition, something else."
2"A token, yellowed, etched with markings she didn't recognise — and yet some animal part of her did, the same part that had screamed at her in that Deptford warehouse to run."
3"And there — at the edge of the circle, faint enough to miss if you weren't looking — a scorched line, thin as thread, scribed into the concrete."
94.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount747
adjectiveStacks1
stackExamples
0"open, frost-rimed eyes,"
adverbCount15
adverbRatio0.020080321285140562
lyAdverbCount0
lyAdverbRatio0
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences98
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences98
mean11.2
std8.96
cv0.8
sampleLengths
022
127
214
34
44
57
66
717
89
94
1015
118
1214
1318
1412
155
167
1723
186
194
2020
2110
227
2318
249
2524
264
277
2810
2921
305
312
325
336
342
3523
364
373
381
3913
4024
4115
422
433
446
452
463
4712
485
4920
72.11% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats6
diversityRatio0.46938775510204084
totalSentences98
uniqueOpeners46
0.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount0
totalSentences63
matches(empty)
ratio0
80.32% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount22
totalSentences63
matches
0"He didn't look up"
1"She crossed the space, her"
2"She knelt beside the body"
3"His eyes were open, fixed"
4"His skin had taken on"
5"His shoes were polished leather."
6"She nodded toward the staircase,"
7"She traced the edge of"
8"She studied the waxen face"
9"She leaned closer."
10"She'd smelled it before, three"
11"It shouldn't have been."
12"she said, and dropped it"
13"Her fingers wanted to keep"
14"She made them let go."
15"She moved her torch in"
16"She held the beam steady"
17"It curved away from the"
18"She followed it with her"
19"He came, and stopped, and"
ratio0.349
15.56% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount56
totalSentences63
matches
0"The abandoned Tube station beneath"
1"Detective Harlow Quinn ducked under"
2"The murmur of forensics."
3"The crackle of radios."
4"The shuffle of paper booties"
5"This one had none of"
6"A uniformed officer met her"
7"Quinn moved past him"
8"The ticket hall opened up"
9"Decades of graffiti layered the"
10"He didn't look up"
11"She crossed the space, her"
12"That was the first thing"
13"Pike rose, brushing his knees"
14"She knelt beside the body"
15"The man lay on his"
16"His eyes were open, fixed"
17"His skin had taken on"
18"Quinn shone her torch along"
19"The man wore a wool"
ratio0.889
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences63
matches(empty)
ratio0
83.33% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences24
technicalSentenceCount2
matches
0"Detective Harlow Quinn ducked under the strip of police tape and descended the stairs, her torch beam cutting through dust that hung suspended in the dead air."
1"A token, yellowed, etched with markings she didn't recognise — and yet some animal part of her did, the same part that had screamed at her in that Deptford ware…"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags20
uselessAdditionCount1
matches
0"officer met, his face pale beneath the harsh portable lamps"
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags2
fancyCount1
fancyTags
0"she repeated (repeat)"
dialogueSentences48
tagDensity0.042
leniency0.083
rawRatio0.5
effectiveRatio0.042
83.3627%