Run: 2026-02-17-01KHMQH81PKE4ZF52WS95MBSME

Run Details

Duration:
17.8s
Cost:
$0.008712
Provider:
Anthropic

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 abandoned Tube station reeked of rust and decades-old mold. Detective Harlow Quinn descended the crumbling stairs with her torch held steady, its beam cutting through darkness so complete it seemed almost tangible. Her left wrist caught the faint luminescence as she checked her watch—2:47 a.m. The leather band felt warm against her skin, a small anchor point in the wrongness that permeated this place. The body had been found by a homeless man seeking shelter. That was the official story, at least. What they'd told the press. The truth was considerably more complicated. Eva Kowalski stood near the victim, her round glasses reflecting the torch light like twin moons. She'd been called in as a consultant—a favor, really, from someone Quinn preferred not to think about—and she looked profoundly out of place in this concrete tomb. Her worn leather satchel was propped against the tiled wall, practically vibrating with barely contained nervousness. She tucked a curly red strand of hair behind her left ear, a gesture Quinn had learned to recognize as a sign of serious anxiety. "Detective Quinn," Eva said, straightening. "Thank you for coming in person. I didn't want to explain this over the phone." Quinn approached the body without responding. Patience was a tool she'd learned to wield with precision over eighteen years in the Metropolitan Police. A young man, early twenties, lying on his back with his eyes open and staring at the ceiling. The emergency lights painted everything in shades of clinical blue and yellow. There was minimal blood. That was the first problem. "Blunt force trauma, according to the preliminary examination," Quinn said, crouching beside the corpse. "The medical examiner thinks he was struck multiple times. But look here." She pointed to the victim's face with one gloved finger, not quite touching the pale skin. "The contusions are consistent with a beating, yes? Bruising around the eyes, swelling on the jaw." "That's what I wanted to show you," Eva said, kneeling down with less grace than Quinn. Her jeans caught against the grimy floor. "The thing is—and I know this sounds mad—but the bruises are too uniform. Too symmetrical." Quinn's jaw tightened. She'd lost her partner, DS Morris, three years ago under circumstances that had never made sense. No body. No explanation. Just a case file that dead-ended into bureaucratic quicksand and a hole in her life that no amount of procedure could fill. The supernatural wasn't supposed to be her department. It wasn't supposed to be anyone's department, which was rather the point. "Explain," Quinn said flatly. Eva pushed her glasses up the bridge of her nose. "I've been studying the restricted archives at the museum for the past two years. Ancient texts, mostly. Some of them reference entities that feed on synchronicity—perfect patterns. Perfect violence. A traditional beating would be chaotic, right? Random strikes, some landing true, others glancing. But this?" Eva gestured at the body. "This is methodical. Geometric. Each blow placed with mathematical precision." Quinn stood, her military bearing rigid against the creeping damp. The Tube station had been closed since the 1970s, sealed off after some incident nobody seemed to remember clearly. The walls wept with moisture. Fungi bloomed in the corners like diseased flowers. Nothing about this place felt natural. "You're suggesting the victim was killed by something other than a person," Quinn said. It wasn't a question. "I'm suggesting we look at what doesn't fit before we jump to conclusions," Eva replied carefully. "The killer would have needed to land these blows while the victim was essentially immobilized. But there are no restraint marks. No signs of struggle. The body wasn't dragged here—the blood trail suggests he walked into this station of his own volition and was struck down here." Quinn crouched again, examining the victim's wrists and ankles. Eva was right. No livid marks. No defensive wounds on the hands. The body lay in an almost peaceful arrangement, arms at his sides, legs extended. She'd worked enough homicides to know that bodies told stories, and this one was speaking in a language she desperately wanted not to understand. A sound echoed through the station—the distant hum of the Tube lines that still ran in the tunnels above, a reminder of the living world beyond this tomb. Quinn's torch beam swept across the platform, catching on something metallic a few meters away. She rose and walked toward it, Eva trailing behind. It was a compass. Brass, with a verdigris patina that suggested considerable age. The face was etched with symbols Quinn didn't recognize—not quite Latin, not quite anything she'd seen before. The needle didn't point north. It swung slowly in lazy circles, searching for something. "That wasn't here when the first responders secured the scene," Quinn said. It was a statement, not an accusation, but Eva flinched regardless. "I know," Eva whispered. "I found it about twenty minutes before you arrived. It was lying on the victim's chest, and it's still warm. Detective, I think—" "The victim has no history of illegal activity," Quinn interrupted, her tone cutting through the darkness like her torch beam. "No known associates. No reason to be in an abandoned Tube station in the middle of the night, which means someone brought him here. Someone or something that knew exactly where to find him, knew exactly what to do with him once they had him, and was precise enough to leave a calling card." She turned to face Eva fully, noting how the younger woman seemed to shrink under her gaze. Quinn had learned long ago that intimidation was simply a matter of steady attention and silence. People feared silence more than words. "The question," Quinn continued, "isn't what killed him. The question is why. You came to me because you know something. You came to me because this"—she held up the compass, watching its needle swing—"means something specific to you and your research. So I'm asking you directly, Ms. Kowalski: what is this?" Eva's hands trembled as she reached for the compass. When she spoke, her voice was barely audible over the sound of dripping water echoing through the station. "It's a marker," she said. "It points to rifts in reality. Thin places where things that shouldn't exist can slip through. And if someone's using it to find victims, Detective Quinn, then we're not dealing with a murder. We're dealing with a hunt." The compass needle swung suddenly, pointing deeper into the darkness of the station, toward tunnels that hadn't been maintained in decades. Quinn's jaw clenched as she secured the compass in an evidence bag. Three years ago, she would have dismissed this entirely. Three years of unexplained disappearances and impossible case files had taught her better. "Then we find out what's hunting," Quinn said quietly, "before it hunts again."
created_at"2026-02-17T02:40:58.372093+00:00" 2/17/2026, 2:40:58 AM
model"anthropic/claude-4.5-haiku-20251001"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency485
moderation_latency(null)
generation_time17715
tokens_prompt923
tokens_completion1781
native_tokens_prompt937
native_tokens_completion1555
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)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"stop"
usage0.008712
router(null)
provider_responses
0
id"msg_01Wd5g3tGa2nsYPkMgJ6ZCjW"
status200
is_byokfalse
latency484
endpoint_id"41d2915a-92e6-4993-b537-210b4e10cba8"
provider_name"Anthropic"
model_permaslug"anthropic/claude-4.5-haiku-20251001"
api_type"completions"
id"gen-1771296038-H044VCWPSlYjNRlRK12l"
upstream_id"msg_01Wd5g3tGa2nsYPkMgJ6ZCjW"
total_cost0.008712
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"

Evaluation details

Result Evaluator Details Meta Data
22.2222% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags12
adverbTagCount4
adverbTags
0"Quinn said flatly [flatly]"
1"Eva replied carefully [carefully]"
2"Quinn continued, she held up the compass, watching its needle swing—\"means something specific to you and your research. So I'm asking you directly, Ms. Kowalski: what is [directly]"
3"Quinn said quietly [quietly]"
65.0044% AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount1143
totalAiIsmAdverbs4
found
0
adverb"carefully"
count1
1
adverb"slowly"
count1
2
adverb"suddenly"
count1
3
adverb"really"
count1
highlights
0"carefully"
1"slowly"
2"suddenly"
3"really"
100.0000% AI-ism character names
Target: 0 AI-default names (17 tracked, −20% each)
codexExemptions(empty)
found(empty)
100.0000% AI-ism location names
Target: 0 AI-default location names (33 tracked, −20% each)
codexExemptions(empty)
found(empty)
38.7577% AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount1143
totalAiIsms7
found
0
word"tangible"
count1
1
word"trembled"
count1
2
word"methodical"
count1
3
word"jaw clenched"
count1
4
word"echoed"
count1
5
word"echoing"
count1
6
word"etched"
count1
highlights
0"tangible"
1"trembled"
2"methodical"
3"jaw clenched"
4"echoed"
5"echoing"
6"etched"
100.0000% Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches1
maxInWindow1
found
0
label"jaw/fists clenched"
count1
highlights
0"jaw clenched"
100.0000% Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells0
narrationSentences71
matches(empty)
100.0000% Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount1
hedgeCount2
narrationSentences71
filterMatches
0"watch"
hedgeMatches
0"seemed to"
100.0000% Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount1
totalSentences79
matches
0"know that bodies"
86.5390% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs25
mean45.24
std20.49
cv0.453
sampleLengths
065
129
284
320
462
558
638
765
84
970
1048
1118
1263
1359
1452
1544
1623
1727
1874
1939
2051
2127
2243
2355
2413
76.9953% Passive voice overuse
Target: ≤5% passive sentences
passiveCount6
totalSentences71
matches
0"been found"
1"been called"
2"was propped"
3"been closed"
4"was etched"
5"been maintained"
100.0000% Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount1
totalVerbs135
matches
0"was speaking"
95.2744% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount747
adjectiveStacks0
stackExamples(empty)
adverbCount31
adverbRatio0.041499330655957165
lyAdverbCount18
lyAdverbRatio0.024096385542168676
100.0000% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences79
echoCount0
echoWords(empty)
100.0000% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences79
mean14.32
std10.99
cv0.767
sampleLengths
010
123
213
319
411
57
65
76
816
927
1016
1125
125
1315
146
1517
1618
1712
184
195
2014
2128
2216
2316
247
2515
263
2716
282
292
3022
318
3212
334
3410
3550
3610
3710
3819
395
408
416
4214
434
4416
4547
469
473
483
496
45.5696% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats9
diversityRatio0.34177215189873417
totalSentences79
uniqueOpeners27
0.0000% Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags12
fancyCount9
fancyTags
0"Eva said, straightening (say, straighten)"
1"Quinn said, crouching beside the corpse (say, crouch)"
2"Eva said, kneeling down with less grace than Quinn (say, kneel)"
3"Quinn said flatly (say flatly)"
4"Eva replied carefully (reply carefully)"
5"Eva whispered (whisper)"
6"Quinn interrupted, her tone cutting through the darkness like her torch beam (interrupt, cut)"
7"Quinn continued, she held up the compass, watching its needle swing—\"means something specific to you and your research. So I'm asking you directly, Ms. Kowalski: what is (continue, hold up watch ask be)"
8"Quinn said quietly (say quietly)"
78.2566%