Run: 2026-02-17-01KHMQJKM5YSHPTFMNXG3CMWQH

Run Details

Duration:
1m 24s
Cost:
$0.085115
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 bone token felt like a dead tooth in Quinn's palm. She turned it over twice, running her thumb across the crude sigil carved into its surface, then held it up to the rusted service door set into the tiled wall of Camden Town station's lowest maintenance corridor. The lock clicked without her touching it. The door swung inward on silent hinges, which was wrong in itself — hinges that old should have screamed. "After you, Detective." The uniformed constable behind her, PC Wardlow, gestured with exaggerated politeness. He was young enough to think this was exciting. Quinn pocketed the token and stepped through. The abandoned platform beyond opened up like the throat of something vast. Victorian brickwork arched overhead, blackened with a century of soot, and the old track bed had been filled in with packed earth and wooden pallets. Naked bulbs strung on wire cast pools of amber light that didn't quite connect, leaving trenches of shadow between them. The air smelled of tallow, dried herbs, and something metallic that sat on the back of Quinn's tongue like a coin. This was the Veil Market — or what was left of it. The stalls were still here, makeshift tables of reclaimed wood and draped fabric, but the merchants were gone. Every last one. In their place: evidence markers, a forensic photographer's flash popping in the middle distance, and the quiet industry of a crime scene already hours old. Quinn checked her worn leather watch. Half four in the morning. She'd been pulled from a dreamless sleep by Dispatch, told only that a body had been found in an unusual location beneath Camden and that her name had been specifically requested. She didn't like having her name requested. It usually meant the requesting party wanted someone to blame when things went sideways. She moved down the platform with the deliberate, measured stride that eighteen years of service had drilled into her bones. Her brown eyes swept the scene in sectors — left to right, floor to ceiling, near to far. The stalls had been abandoned in haste. Goods remained on tables: jars of viscous liquid in colors that had no business existing in nature, bundles of dried plants she didn't recognize, stacks of paper covered in symbols that made her eyes itch when she looked at them too long. On one table, a collection of small brass objects caught the light. Compasses, maybe, though the faces were etched with markings that weren't cardinal directions. She picked one up with a gloved hand. The casing was green with verdigris, the brass gone soft with age, and the needle inside didn't point north. It swung lazily, then locked onto a position somewhere behind her left shoulder. She set it down and made a note. The body was at the far end of the platform, near what would have been the tunnel mouth before it was bricked up. A man, mid-fifties, heavy build, lying on his back with his arms at his sides as though he'd been laid out with care. He wore a long coat over layers of mismatched clothing. His eyes were open. His expression was peaceful, which was the first thing that didn't add up. The second thing was the complete absence of any visible cause of death. Quinn crouched beside him, her sharp jaw set, and studied his face. No bruising. No petechiae. No foam at the lips or nose. His skin had a grayish pallor, but that could be the lighting. She checked his hands — no defensive wounds, no broken nails, no abrasions. His coat was buttoned neatly. One of his boots was untied, but that was it for signs of disorder. "Who found him?" she asked without looking up. "Anonymous tip to the 999 line," Wardlow said from behind her. "Caller described the location in detail but rang off before giving a name. Dispatch traced it to a burner mobile. Dead end." "And who requested me specifically?" Wardlow hesitated. "That came through the DCI's office. I don't have details." Quinn filed that away. She leaned closer to the dead man's face and caught a faint scent — not decomposition, not yet, but something sweet and astringent, like burnt sugar cut with rubbing alcohol. She'd smelled it before. Three years ago, in a warehouse in Deptford, kneeling beside DS Morris's body while paramedics told her there was nothing to be done. Morris, who had been forty-two and fit and who had died with the same peaceful expression and the same absence of any goddamn explanation. Her hands didn't shake. She wouldn't let them. She stood and turned to find that a new arrival had appeared at the edge of the scene, just inside the perimeter tape that someone had strung between two stall posts. The woman was short, red-haired, bespectacled, and looked like she'd dressed in the dark — mismatched cardigan over a rumpled blouse, a worn leather satchel bulging with books slung across her body. She was talking to Wardlow with the rapid, slightly breathless cadence of someone who'd been running. Quinn crossed to them in six strides. "This is a closed crime scene." She said it flatly, a statement of fact rather than an accusation, though the accusation was there if you knew where to look. The woman pushed her round glasses up her nose and tucked a curl of red hair behind her left ear. "I know. I'm the one who called it in." Quinn stared at her. "The anonymous tip." "Eva Kowalski. I'm a research assistant at the British Museum. The restricted archives." She said this last part quietly, as though it were a credential that mattered. Maybe here it did. "I was — I come here sometimes. For research. I arrived tonight and found... him." She glanced toward the body with an expression that was more troubled than frightened. "And I called you. Well, I called 999, and then I called your DCI's office and asked for you by name." "Why me?" Kowalski met her gaze. Her green eyes were steady behind the round lenses. "Because three years ago, your partner died in exactly the same way. And I don't think you've stopped looking for answers." The silence that followed was the kind that has weight. Quinn felt it settle across her shoulders like a coat. Wardlow looked between them, clearly lost. "Wardlow," Quinn said, "go and check whether forensics have finished with the north end of the platform. Take your time." He went. Quinn waited until his footsteps faded before turning back to Kowalski. "Start talking." Kowalski reached into her satchel and pulled out a small leather-bound notebook, its pages bristling with colored tabs. "The Veil Market moves every full moon. New location, new entrance, new bone tokens distributed to the regulars. But this cycle, something's been wrong. The merchants have been nervous. Three of them packed up and left two days ago — a Shade artisan who makes those compasses, an alchemist who deals in banned substances, and an information broker who goes by the name Needle. They all left within hours of each other." "You know these people." "I know of them. I study them. There's a difference." She tucked the curl behind her ear again. "The point is that they sensed something coming, and they ran. Everyone who didn't run is gone too — not fled, just gone. Empty stalls, goods left behind, no sign of struggle. And then there's him." Quinn looked back at the body. "No identification on him. Not yet." "His name is Gresham. Malcolm Gresham. He was the market's steward — the person who managed the location, distributed the tokens, settled disputes. He's been running this operation for at least fifteen years." Kowalski's voice dropped. "He was also the last person to see your partner alive." Quinn's jaw tightened. She could feel the muscle jumping beneath the skin. "You're going to need to explain how you know that." "Because DS Morris came to the Veil Market three years ago. He was investigating something — I don't know what, my sources are incomplete — and Gresham was his contact. Morris met with him, left, and was dead within six hours." She opened her notebook to a tabbed page and held it out. "I've been researching cases like this. Unexplained deaths with no visible cause. There have been seven in London in the last four years, all connected to people who had recent contact with supernatural artifacts or locations. Your partner's case was the third." Quinn took the notebook. The page was covered in Kowalski's small, precise handwriting — dates, names, locations, connected by lines and arrows in different colored ink. It looked like the work of either a brilliant researcher or a paranoid conspiracist. Quinn had learned, over the years, that the line between the two was thinner than most people were comfortable admitting. "You said the evidence doesn't add up," Quinn said slowly. "What's your interpretation?" Kowalski glanced around the empty market, and Quinn watched her eyes linger on the shadows between the light pools. There was something in those shadows — not movement, exactly, but an absence of stillness, as if the dark itself were breathing. "Look at the body's position," Kowalski said. "Arms at his sides. Coat buttoned. He wasn't attacked — he was shut down. Like a machine switched off. And look at the stalls." Quinn looked. She'd already catalogued the abandoned goods, the hasty departure of the merchants, the disorder that suggested fear. But Kowalski was pointing at something else — the pattern of the disorder. Quinn followed her finger and felt the back of her neck prickle. The stalls closest to the body were undisturbed. Every object in place, every jar aligned, every surface dust-free. It was the stalls farthest from the body that showed signs of panic — overturned jars, scattered papers, a chair knocked sideways. Whatever had frightened the merchants, it hadn't come from Gresham's direction. It had come from the other end of the platform. The merchants had fled toward Gresham, and then past him, and then out. But Gresham hadn't fled at all. "He stayed," Quinn said. "He stayed," Kowalski confirmed. "He knew what was coming. He faced it." Quinn walked back to the table with the brass compasses. She picked up the one she'd examined before and held it flat on her palm. The needle swung, quivered, and locked again — pointing toward the bricked-up tunnel mouth behind the body. The same direction the merchants had fled from. "These compasses," she said. "What do they point to?" "Supernatural rifts. Portals. Tears in the boundary between here and somewhere else." Kowalski's voice was quiet, almost gentle, as though she were trying to deliver bad news without breaking something. "They're called Veil Compasses. A Shade artisan makes them — the same one who packed up and left two days ago." Quinn watched the needle. It didn't waver. It pointed at the bricked-up tunnel mouth with the unwavering conviction of a hunting dog on a scent. "Something came through," she said. It wasn't a question. "Something came through," Kowalski agreed. "And I think it's the same thing that killed your partner. The same thing that's killed at least seven people in four years. And Gresham knew it was coming, and he stayed, and he died, and I think he did it on purpose." Quinn set the compass down carefully. She turned to face Kowalski and studied her — the freckled face, the nervous hands, the satchel full of books and research and years of quiet obsession with things that most people would call impossible. "Why come to me?" Quinn asked. "Why not take this to someone who already believes in — " She gestured at the market, the compasses, the impossible underground cathedral of the weird. "All of this." Kowalski's expression shifted. Something old and sad moved behind her green eyes. "Because the people who already believe are either dead, or they ran. I need someone who can investigate. Someone with authority and resources and the kind of stubborn that doesn't let go of a case for three years." She paused. "And because you deserve to know what killed your partner. Even if the answer doesn't look like anything you've been trained to accept." Quinn looked at the body of Malcolm Gresham, laid out like a man who'd gone to sleep and simply never woken up. She looked at the Veil Compass, its needle pointing toward a wall of Victorian brick that should have been the end of the line but somehow wasn't. She thought about Morris — his laugh, his terrible coffee, the look on his face the last time she'd seen him alive, as though he'd glimpsed something that language hadn't been built to describe. She pulled out her phone and dialed the forensics lead. "This is DI Quinn. I want a full workup on the deceased — toxicology, histology, everything. And I want the tunnel mouth behind him examined. The brickwork. Check for any structural anomalies, gaps, anything that doesn't match the original construction." She paused. "And bag every one of those brass compasses on the third stall from the left. I'm taking them into evidence." She hung up and looked at Kowalski. "You're going to show me everything in that notebook. And then you're going to take me through every case, every connection, every piece of research you've done. All of it." Kowalski nodded. She tucked the curl behind her ear one more time. "There's a coffee shop on Parkway that opens at five," she said. Quinn checked her watch. Ten to five. Close enough. She took one last look at the Veil Market — the abandoned stalls, the dead man, the compass needles all pointing toward something she couldn't yet see — and followed Eva Kowalski toward the door, stepping carefully over the threshold and back into a world that suddenly felt thinner than it had four hours ago.
created_at"2026-02-17T02:42:48.510836+00:00" 2/17/2026, 2:42:48 AM
model"anthropic/claude-4.6-opus-20260205"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1329
moderation_latency(null)
generation_time84065
tokens_prompt923
tokens_completion3511
native_tokens_prompt938
native_tokens_completion3217
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"
usage0.085115
router(null)
provider_responses
0
id"msg_01N3LbpJysLt4qK2rx9xwoFd"
status200
is_byokfalse
latency1329
endpoint_id"c926c048-563e-44b0-8434-95965bee924c"
provider_name"Anthropic"
model_permaslug"anthropic/claude-4.6-opus-20260205"
api_type"completions"
id"gen-1771296083-xGENFZFdC125lJtJ1Jp2"
upstream_id"msg_01N3LbpJysLt4qK2rx9xwoFd"
total_cost0.085115
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"

Evaluation details

Result Evaluator Details Meta Data
100.0000% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags14
adverbTagCount1
adverbTags
0"Quinn said slowly [slowly]"
74.0147% AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount2309
totalAiIsmAdverbs6
found
0
adverb"carefully"
count2
1
adverb"lazily"
count1
2
adverb"slightly"
count1
3
adverb"slowly"
count1
4
adverb"suddenly"
count1
highlights
0"carefully"
1"lazily"
2"slightly"
3"slowly"
4"suddenly"
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)
78.3456% AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount2309
totalAiIsms5
found
0
word"quivered"
count1
1
word"unwavering"
count1
2
word"weight"
count1
3
word"footsteps"
count1
4
word"etched"
count1
highlights
0"quivered"
1"unwavering"
2"weight"
3"footsteps"
4"etched"
100.0000% Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches0
maxInWindow0
found(empty)
highlights(empty)
100.0000% Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells0
narrationSentences132
matches(empty)
100.0000% Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount2
hedgeCount0
narrationSentences132
filterMatches
0"watch"
hedgeMatches(empty)
100.0000% Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount2
totalSentences158
matches
0"find that a"
1"is that they"
100.0000% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs62
mean37.55
std29.01
cv0.773
sampleLengths
074
123
27
378
458
563
6112
748
873
913
1067
118
1233
135
1412
1585
168
1779
187
1929
2029
217
2281
232
2434
2526
2620
2713
282
2990
304
3154
3212
3347
3422
3595
3660
3713
3841
3931
4044
4180
424
4312
4450
459
4651
4725
489
4948
77.7778% Passive voice overuse
Target: ≤5% passive sentences
passiveCount11
totalSentences132
matches
0"been filled"
1"were gone"
2"been pulled been found"
3"been abandoned"
4"were etched"
5"was bricked"
6"been laid"
7"was buttoned"
8"was untied"
9"was covered"
10"been built"
100.0000% Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount4
totalVerbs275
matches
0"was talking"
1"were breathing"
2"was pointing"
3"were trying"
94.0000% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1576
adjectiveStacks1
stackExamples
0"small leather-bound notebook,"
adverbCount47
adverbRatio0.02982233502538071
lyAdverbCount15
lyAdverbRatio0.00951776649746193
100.0000% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences158
echoCount0
echoWords(empty)
100.0000% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences158
mean14.73
std12
cv0.814
sampleLengths
011
137
27
319
414
59
67
712
825
920
1021
1112
1218
133
1425
156
165
1731
187
1914
2020
2118
227
2342
2412
2513
268
2719
2813
298
3023
3123
3210
334
3413
3513
3612
372
382
397
4012
4113
425
4314
448
4511
4622
475
482
4910
42.1941% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats15
diversityRatio0.310126582278481
totalSentences158
uniqueOpeners49
100.0000% Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags14
fancyCount3
fancyTags
0"Quinn said slowly (say slowly)"
1"Kowalski confirmed (confirm)"
2"Kowalski agreed (agree)"
92.1372%