Run: 2026-02-17-01KHMR0ERX8WVJD99PSRNWS3W5

Run Details

Duration:
1m 7s
Cost:
$0.065365
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="4417" name="Tomás Herrera" aliases="Tommy, Tomás, Herrera" pronouns="he/him" species="Human" storyRole="Support"> <eyeColor>warm brown</eyeColor> <hair>short curly dark brown</hair> <height>5'10"</height> <age>29</age> <skinTone>olive skin</skinTone> <scar>scar running along his left forearm from a knife attack</scar> <medallion>Saint Christopher medallion around his neck</medallion> <birthplace>Seville, Spain</birthplace> <description>A former paramedic who provides off-the-books medical care for the clique.</description> <backstory>Born in Seville, Spain. He moved to London to work for the NHS but lost his license after administering unauthorized treatments to supernatural patients.</backstory> </character> <location id="854" name="The Raven's Nest" aliases="the Nest, Raven, Silas' bar" realm="Earth"> <signColor>distinctive green neon sign above the entrance</signColor> <secretRoom>hidden back room accessible through a bookshelf, used for clandestine meetings</secretRoom> <description>A dimly lit bar in Soho, London. The walls are covered with old maps and black-and-white photographs.</description> </location> <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> </codex> Write a fully fleshed out scene of at least 1000 words in the thriller genre. A detective is pursuing a suspect through rain-soaked city streets at night. The chase takes them from the street level down into an underground market. The detective must decide whether to follow the suspect into unfamiliar and potentially dangerous territory. 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 rain hit the pavement in sheets, turning Soho into a blur of smeared neon and black glass. Harlow Quinn ran. She'd spotted Herrera ducking out the side door of The Raven's Nest forty seconds ago, his silhouette caught for half a heartbeat under the bar's green neon sign before he bolted north. She hadn't bothered calling it in. No time. No backup close enough to matter. She'd just pushed off the brick wall where she'd been watching the entrance for the last two hours and given chase, her worn leather watch catching the rain, her lungs already burning from the cold. He was fast. Younger by twelve years, and he moved like someone who'd spent a lifetime learning when to run. She could see him half a block ahead, weaving between parked cars on Frith Street, his dark jacket slick with rain. The Saint Christopher medallion she'd noticed in his file photos would be bouncing against his chest right now, she thought. Patron saint of travelers. He was going to need it. Quinn's boots struck a puddle and she didn't slow. She was gaining, or at least not losing ground, her stride eating the distance with a mechanical efficiency that eighteen years of service and a body maintained with military precision could still deliver at forty-one. She could feel her pulse in her temples. Controlled. Steady. The way Morris had taught her to run—don't chase, pursue; there's a difference, Harlow, it's in your breathing. Morris. Three years dead and still coaching her from the grave. Herrera cut left on Old Compton Street, and she followed, nearly colliding with a couple stumbling out of a pub. She sidestepped them without breaking stride. A car horn blared somewhere behind her. The rain intensified, needling her face, and she swiped her hand across her eyes without slowing. She'd been building the case for six weeks. The clique—that's what they called themselves, the loose network of people operating out of The Raven's Nest and its hidden back room behind the bookshelf—had their fingers in something she couldn't yet name. Unauthorized medical treatments, off-the-books supply chains, meetings conducted behind locked doors in a Soho bar. Herrera was the thread she'd chosen to pull. Former paramedic. NHS license revoked. Still practicing medicine, but not for anyone on the official rolls. He turned north again, heading toward Charing Cross Road. Quinn tracked his movement, reading the angle of his body, the way his head kept turning—not to look behind him, she realized, but ahead. He wasn't panicking. He was navigating. He knew exactly where he was going. That realization sharpened something in her chest. She pushed harder, closing the gap to thirty meters as they crossed Charing Cross Road against the light. A bus whooshed past behind her, close enough that she felt the displaced air against her back. Herrera didn't look back. He knew she was there—he'd seen her when he came out the side door, their eyes had met for that electric fraction of a second under the green neon—but he was running toward something, not away from her. Camden. He was heading toward Camden. The thought surfaced from six weeks of case files and surveillance notes and the two informants who'd gone quiet on her. Something under Camden. An abandoned Tube station. A market that moved locations every full moon. She glanced up at the sky reflexively, but there was nothing to see—just low clouds the color of wet ash, underlit by the city. She'd checked. Tonight was the full moon. Herrera cut through an alley she would have missed if she hadn't been watching for exactly the kind of move a man who knows his city makes. The passage was barely shoulder-width, flanked by the back walls of restaurants, and it stank of cooking grease and standing water. Her boots splashed through something she chose not to identify. At the far end, he vaulted a low railing and dropped out of sight. Quinn reached the railing four seconds later. Below was a service stairwell leading down to what looked like a maintenance entrance—an old access point to the Underground, sealed with a metal door that should have been locked and wasn't. It stood ajar, a wedge of amber light spilling up the concrete steps. She stopped. The rain hammered her shoulders, ran down the sharp line of her jaw. Her breath came in controlled bursts, vapor curling from her lips. She braced her hands on the railing and stared down into the light. She could hear it now, beneath the rain—a low murmur that might have been voices, might have been the rumble of trains on a distant line, might have been something else entirely. The amber light flickered as though cast by something other than electricity. The smart play was to call it in. She had her radio. She had Herrera's direction of travel, a specific location, probable cause enough for a warrant if she could describe what she'd seen. She could have a team here in twenty minutes. Proper support. Proper protocol. Except the last time she'd waited for proper support, Morris had gone ahead alone. Quinn pressed her eyes shut. Three years, and she could still feel the weight of that night—the warehouse in Bermondsey, the door Morris had gone through while she waited for the Armed Response Unit, the sounds she'd heard from inside that she'd never been able to explain in her report. They'd found his body but not the suspects. They'd found his service weapon fully loaded, unfired. They'd found marks on his skin that the pathologist had listed as "inconsistent with known mechanisms of injury" before the report was quietly sealed. She'd spent three years not understanding what had happened to her partner. And now she was standing at the top of a stairwell that might lead to answers, or might lead to the same kind of door Morris had walked through and never come back from. She opened her eyes. Herrera was down there. The clique was down there. Whatever they were protecting behind the bookshelf at The Raven's Nest, whatever they were buying and selling in an abandoned Tube station that changed locations with the phases of the moon—it was all down there. Quinn pulled her jacket tighter and checked her weapon in its shoulder holster. The Glock was there, solid and real and bound by the physics she understood. She thought about the entry requirement she'd heard whispered about—a bone token, something you had to carry to gain access. She didn't have one. She didn't know what one looked like. The door was open. Maybe that was enough. Maybe Herrera had left it open on purpose, or in his haste, or because whatever security the market relied on assumed that no one without a token would be foolish enough to enter. She swung her legs over the railing. The stairwell was narrower than it had looked from above. The walls were tiled in the old London Underground style—cream and dark green—but the tiles were cracked and weeping moisture, and someone had scratched symbols into the grout that she didn't recognize. The amber light came from below, pulsing faintly, and as she descended she could feel the temperature change—not colder, as she'd expected, but warmer, like descending into the throat of something alive. The murmur resolved into distinct sounds. Voices, yes, but layered over other things—the clink of glass, a rhythmic hammering, something that might have been music played on instruments she couldn't identify. The air carried a smell that was partly incense, partly ozone, partly the hot-metal scent of a welding shop. At the bottom of the stairs, a short corridor led to a wider space. She pressed herself against the wall and edged forward until she could see. The abandoned station opened before her like a cathedral turned inside out. The old platform had been transformed into a marketplace, stalls and booths crowding every surface, some built from scavenged wood and corrugated metal, others from materials that seemed to shift and settle like liquid when she wasn't looking directly at them. Lanterns hung from the arched ceiling on chains of varying length, casting overlapping circles of light in colors that ranged from amber to deep violet. Hundreds of people—if people was the right word—moved through the space, browsing, haggling, carrying parcels wrapped in cloth and paper and what looked like leaves. She spotted Herrera. He was thirty meters ahead, moving through the crowd with the ease of someone who belonged. He'd slowed to a walk. His shoulders had dropped. He paused at a stall draped in dark fabric, spoke to the vendor—a woman whose proportions struck Quinn as not quite right, though she couldn't articulate why—and accepted a small wrapped package that he tucked inside his jacket. Medical supplies. Off-the-books treatments for patients no hospital would admit. That was the theory she'd built, and she was watching it confirmed in real time. Quinn's hand drifted to her weapon. The instinct was automatic, a comfort reflex, but even as her fingers brushed the holster she knew it was wrong. Whatever rules governed this place, they weren't hers. She was standing in a world she hadn't known existed six weeks ago, and the Glock in her shoulder holster felt suddenly as relevant as a torch in a hurricane. A figure near the entrance—a broad man with skin the color and texture of tanned leather, sitting on an overturned crate—turned his head and looked directly at her. His eyes were the pale yellow of old bone. He didn't speak. He didn't move. He just looked. Quinn looked back. She thought about Morris. She thought about the sealed pathology report and the marks on his skin that no one could explain. She thought about the eighteen years of service that had taught her to trust evidence and procedure and the chain of command, and how none of that architecture could account for what she was seeing now. She could still turn around. She could climb the stairs, radio for backup, file a report that no one would believe. She could preserve the clean lines of her career and her understanding of the world. She could walk away from the one place that might finally explain what had killed her partner. The man with the yellow eyes was still watching her. Quinn stepped forward, off the corridor's edge and onto the platform. The crowd swallowed her in a wash of noise and warmth and the smell of things she had no names for. Ahead of her, Herrera was moving deeper into the market, and she followed, keeping her distance, keeping her breathing steady, keeping her hand away from her weapon because whatever came next, she understood with a cold clarity that settled into her bones like rain—the gun was not going to help her here. She was through the door Morris had gone through. The only question now was whether she'd come back out.
created_at"2026-02-17T02:50:05.424123+00:00" 2/17/2026, 2:50:05 AM
model"anthropic/claude-4.6-opus-20260205"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1519
moderation_latency(null)
generation_time67307
tokens_prompt914
tokens_completion2770
native_tokens_prompt918
native_tokens_completion2431
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"
usage0.065365
router(null)
provider_responses
0
id"msg_011ta5EvPXfm93wP1nhzKUS8"
status200
is_byokfalse
latency1519
endpoint_id"c926c048-563e-44b0-8434-95965bee924c"
provider_name"Anthropic"
model_permaslug"anthropic/claude-4.6-opus-20260205"
api_type"completions"
id"gen-1771296537-a4ykZ37IioIcLn7zlVXf"
upstream_id"msg_011ta5EvPXfm93wP1nhzKUS8"
total_cost0.065365
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
totalTags0
adverbTagCount0
adverbTags(empty)
94.6179% AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount1858
totalAiIsmAdverbs1
found
0
adverb"suddenly"
count1
highlights
0"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)
83.8536% AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount1858
totalAiIsms3
found
0
word"flickered"
count1
1
word"weight"
count1
2
word"navigating"
count1
highlights
0"flickered"
1"weight"
2"navigating"
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
narrationSentences134
matches(empty)
100.0000% Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount1
hedgeCount2
narrationSentences134
filterMatches
0"watch"
hedgeMatches
0"happened to"
1"seemed to"
100.0000% Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount0
totalSentences134
matches(empty)
100.0000% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs42
mean43.52
std28.31
cv0.651
sampleLengths
021
181
271
372
411
549
680
739
87
984
106
1160
127
1372
1452
152
1637
1744
1847
1914
2090
2146
224
2344
2458
254
2637
277
2874
2950
3027
31103
3266
3325
3464
3546
363
3758
3853
3910
4084
4119
100.0000% Passive voice overuse
Target: ≤5% passive sentences
passiveCount3
totalSentences134
matches
0"been locked"
1"were tiled"
2"been transformed"
100.0000% Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount13
totalVerbs316
matches
0"was gaining"
1"wasn't panicking"
2"was navigating"
3"was going"
4"was running"
5"was heading"
6"was standing"
7"were protecting were buying"
8"wasn't looking"
9"was watching"
10"was standing"
11"was seeing"
100.0000% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1852
adjectiveStacks0
stackExamples(empty)
adverbCount46
adverbRatio0.024838012958963283
lyAdverbCount18
lyAdverbRatio0.009719222462203024
100.0000% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences134
echoCount0
echoWords(empty)
100.0000% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences134
mean13.64
std11.09
cv0.813
sampleLengths
018
13
232
36
42
56
635
73
817
921
1020
114
126
139
1435
158
161
171
1818
191
2010
2120
226
237
2416
258
2633
2715
288
292
303
3111
329
3324
343
353
367
377
3818
3917
404
4138
421
435
4421
453
464
478
4824
492
28.3582% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats29
diversityRatio0.29850746268656714
totalSentences134
uniqueOpeners40
100.0000% Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags0
fancyCount0
fancyTags(empty)
94.5194%