Run: 2026-02-17-01KHMQYT671YHJ6EHNGVJ92HYN

Run Details

Duration:
51.5s
Cost:
$0.016974
Provider:
OpenAI

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
Detective Harlow Quinn spotted her mark rounding the corner, slipping through a haze of silver rain under the jaundiced glow of a streetlamp. The night pressed in, all wet asphalt and fractured neon, swallowing sound except for the fugitive’s frantic footfalls and Quinn’s own pounding heart. She cut east, boots splashing through puddles, coat flaring behind her like the black wings of some grim omen. The city offered no mercy—every surface slick, every shadow threatening—but she drove herself on anyway, jaw clenched with a purpose so sharp it bruised bone. Lights from the Raven’s Nest flickered ahead, the green neon sign buzzing over a river of runoff. For a moment, she thought he’d ducked into Silas’ bar with its curated gloom and secrets mapped across the walls. But then she glimpsed a movement—there, beyond the mouth of the alley, a silhouette vaulting the rusted rail at the old station stairs. Quinn didn’t hesitate. She leaped the curb and barreled after him, a flash of her worn leather watch glinting as she wrestled for balance. The suspect—tall, sinewy, face mostly hidden beneath a hood—flung himself down the chipped steps that once led commuters to daylight. He vanished into the long-abandoned Tube station, hungry dark yawning at his heels. Rain hammered the paving behind her. It painted her scalp with cold as she slowed at the stairwell’s edge and drew in a steadying breath, every sense quivering. Eighteen years as a cop, most of them in London’s strangest writhings—yet nothing had ever rattled her quite like the Station. Not after what happened with Morris. She flexed her right hand, felt the phantom ache of loss. Below, somewhere in the gloom, footsteps echoed like distant gunshot. On the threshold, she hesitated. Standard procedure screamed caution. She should call backup, wait for uniforms, set a cordon. But the path her mark had taken—he wasn’t just running. He was choosing this place, leading her. And if what she suspected about the recent Soho disappearances was true, she couldn't risk losing him. She pressed on. The descent narrowed, air thick with the scent of rust and old stories. At the bottom, mildew seeped into her lungs and the only light came from her torch, which turned every surface into a study of ruin—cracked tiles, shattered glass, a museum of graffiti and decay. The platforms stretched ahead, swallowed by black. Rainwater dripped from forgotten archways, and in the distance, she heard—no, felt—movement. Not just the slap of a single set of shoes, but the strange hum of life below the city’s skin. A burst of footsteps came from her left. She followed, torch beam cutting a jagged path, tracking the flecks of mud where the suspect had run. Then a pale glimmer caught her eye: a bone token, strung on a length of twine, dangling like a clue from a nail hammered into a rotting beam. Quinn slowed. Sweat slicked her palms despite the cold. She recognized the object from rumour, the kind of whispers she usually dismissed as pub nonsense—a bone token, the supposed key to London's most dangerous secret. “Veil Market,” someone had murmured once, over whisky and the clash of storm outside. “Only opens for those with the right currency. You won’t like what you find there.” The suspect was gone now, vanished as if swallowed by the loose earth. At the far side of the platform, the tiles glimmered wetly around a ladder leading down—fresh scuffs, the trail too recent to ignore. Quinn weighed her choices. Everything official in her life told her to turn back: unknown territory, no backup, God alone knew what else waited beneath Camden’s bones. But she remembered Morris. She remembered the way they’d chased answers into places half the force pretended didn’t exist. If she balked now, she’d never get another chance to stop the pattern—to figure out what was really crawling through her city’s veins. She moved forward, legs steady now, gaze stitched to every detail. At the ladder’s foot, earth and brick pressed close. The narrow corridor buzzed with sound—voices, laughter, the pulse of commerce somewhere ahead. She followed, feeling the pressure of the metropolis overhead, people living and dying above her while she hunted something strange and hungry underneath. The corridor spit her out at a gate reinforced with scavenged iron and copper wire. Beyond, two figures flanked by battered torches blocked the way: one tall, androgynous, with a spiderweb tattoo climbing up one cheek; the other smaller, eyes yellow in the lamplight, arms folded tight. They eyed her up and down, assessing threat, noting the badge clipped inside her coat. “Not your usual sort, copper,” the tall one said. Quinn kept her hands visible. “Someone came through—a man in a black windbreaker, white trainers. You see him?” Yellow-eyes grinned, showing a gold canine. “Everyone comes through, but not everyone’s welcome.” He nodded to the bone token swinging above the gate, as if to clarify the rules. She folded her arms, damp hair clinging to her brow. “I’m not here for trouble. Just need to talk to him.” The tall figure cocked her head. “That’s what they all say before the shooting starts.” A shout rose up from inside—a woman’s voice, urgent, muffled by distance and the thick market air. It carried a note that chilled Quinn’s blood, something ancient and panicked, too wild for Soho at midnight. The sentries didn’t flinch. Quinn locked onto the glint of the bone token. Quickly, she pulled out her badge and tossed it to the ground at their feet. “That means I’m responsible for what happens if you let me in. He’s dangerous. You want him running loose in your market?” Spiderweb considered, sharp features glinting in the torchlight. “If you step through, you follow the rules. No police business in the Market, understood? Or you don’t come out.” “I’ll follow your rules,” Quinn said, voice even. “Just let me see him.” A pause, heavy with the possibility of violence. Then Spiderweb nodded. Yellow-eyes tugged open the gate and motioned her through. The Veil Market unfolded around her like a fever dream. Steam spilled from kettles boiling with strange, jewel-bright mushrooms. Stalls lined the platform walls, manned by merchants with eyes too dark, too knowing; the air reeked of petrol, incense, and something faintly sweet, like cut grass after a slaughter. Gold flickered in the gloom, coins traded for vials of syrupy liquid. Quinn clocked three men in heavy coats whose silhouettes kept shifting, as if the light couldn’t quite hold them. She edged along the main artery, hand close to her holster. Nothing here was built for her eyes—sigils scrawled on cardboard, wares wrapped in velvet, teeth sold from battered trays. A narrow-faced child offered her a glimmering charm on a string. She pressed on, searching for her mark. There—a flash of the windbreaker over by a stall bristling with old radios. Herrerra. He moved with a paramedic’s grace, even here; she clocked his olive skin, the Saint Christopher medallion dancing at his throat, a scar slicing his left forearm. A heartbeat, and he slipped through a tapestry draped over a second entrance. Quinn followed, closing the gap. Her throat tightened: Herrera was supposed to be off the board—license revoked, reputation ruined. But he moved like someone who understood the rules of two worlds. He ducked beneath an archway, and she was on him. “Herrera!” Her voice cracked like a whip. He spun, setting himself, hands open. Behind his calm, his eyes flicked with worry. “Detective Quinn,” he said, voice pitched low. “You shouldn’t be down here.” She stepped into his space, smelling antiseptic and fear. “You’re running, Tommy. People are dead. Point me at who I need.” A ripple went through the market at her words. The vendors quieted, their eyes bead-bright and sharp. Somewhere far off, sirens haunted the world above, muted and distant. Herrera’s mouth worked, jaw flexing as if grinding teeth. “I’m not your enemy, Harlow. But if you stay, you’ll be everyone’s problem.” She looked past him—beyond, the Market stretched on, coiling and strange. There would be no help, not for her or for her badge. She weighed her choices again, pulse ringing her skull, rainwater still trickling down her back. The city above was familiar, if brutal. Here, anything could happen; here, the old ghost of Morris whispered warnings she barely understood. But retreat wasn’t in her nature, and if Herrera was right—if someone truly dangerous was moving among the stalls—she’d be damned if she left without answers. She squared her shoulders and stepped deeper into the Market.
created_at"2026-02-17T02:48:55.522236+00:00" 2/17/2026, 2:48:55 AM
model"openai/gpt-4.1-2025-04-14"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency321
moderation_latency(null)
generation_time51400
tokens_prompt914
tokens_completion2282
native_tokens_prompt811
native_tokens_completion1919
native_tokens_completion_images0
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"completed"
usage0.016974
router(null)
provider_responses
0
id"resp_040ca9734646edca016993d6e39c288193a658b381db77a866"
status200
is_byokfalse
latency131
endpoint_id"c235abe8-11cc-42d3-95ad-72f4d198287a"
provider_name"OpenAI"
model_permaslug"openai/gpt-4.1-2025-04-14"
api_type"completions"
id"gen-1771296483-rZGHD97VAoRTafDbMSMR"
upstream_id"resp_040ca9734646edca016993d6e39c288193a658b381db77a866"
total_cost0.016974
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
50.0000% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags4
adverbTagCount1
adverbTags
0"someone had murmured once, over whisky and the clash of storm outside [once]"
79.3814% AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount1455
totalAiIsmAdverbs3
found
0
adverb"quickly"
count1
1
adverb"really"
count1
2
adverb"truly"
count1
highlights
0"quickly"
1"really"
2"truly"
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)
3.7801% AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount1455
totalAiIsms14
found
0
word"tapestry"
count1
1
word"flickered"
count2
2
word"flicked"
count1
3
word"glint"
count1
4
word"glinting"
count2
5
word"velvet"
count1
6
word"fractured"
count1
7
word"jaw clenched"
count1
8
word"dancing"
count1
9
word"footsteps"
count2
10
word"echoed"
count1
highlights
0"tapestry"
1"flickered"
2"flicked"
3"glint"
4"glinting"
5"velvet"
6"fractured"
7"jaw clenched"
8"dancing"
9"footsteps"
10"echoed"
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
narrationSentences99
matches(empty)
100.0000% Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount1
hedgeCount0
narrationSentences99
filterMatches
0"watch"
hedgeMatches(empty)
100.0000% Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount0
totalSentences109
matches(empty)
100.0000% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs37
mean38.57
std22.94
cv0.595
sampleLengths
090
160
257
366
410
553
63
786
854
964
1036
1169
1256
1362
149
1518
1629
1721
1815
1939
2046
2128
2213
2320
2480
2548
2654
2731
2817
2926
3021
3128
3222
3323
3437
3526
3610
100.0000% Passive voice overuse
Target: ≤5% passive sentences
passiveCount3
totalSentences99
matches
0"was gone"
1"was built"
2"was supposed"
100.0000% Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount1
totalVerbs232
matches
0"was choosing"
94.0000% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1308
adjectiveStacks1
stackExamples
0"strange, jewel-bright mushrooms."
adverbCount42
adverbRatio0.03211009174311927
lyAdverbCount9
lyAdverbRatio0.006880733944954129
100.0000% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences109
echoCount0
echoWords(empty)
100.0000% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences109
mean13.09
std7.17
cv0.548
sampleLengths
023
123
219
325
417
520
623
73
821
920
1013
116
1222
1321
146
1511
1610
175
184
1910
2010
217
2217
233
2413
2534
267
2712
2820
298
3018
3128
322
337
3426
3514
3615
3713
3823
394
4023
414
4215
4323
4411
459
4613
4723
4815
4932
71.8654% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats0
diversityRatio0.43119266055045874
totalSentences109
uniqueOpeners47
50.0000% Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags4
fancyCount2
fancyTags
0"someone had murmured once, over whisky and the clash of storm outside (murmur once)"
1"he said, voice pitched low (say, pitch)"
85.2369%