Run: 2026-02-17-01KHMMSRW1Y1N7NSW1SX4ZFQ0Z

Run Details

Duration:
48.3s
Cost:
$0.037596
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 stairwell descended deeper than any authorized Underground station should. Detective Harlow Quinn counted each step as she followed the uniform down, her leather-soled shoes clicking against concrete worn smooth by what seemed like decades of foot traffic. Eighty-seven steps. Far too many. "How exactly was this place discovered?" she asked, her breath visible in the increasingly cold air. "Rail maintenance crew," the uniform replied without turning. "Following up on reports of unusual power fluctuations. Found the entrance behind a false wall." Quinn nodded, though no one could see it. Her hand brushed unconsciously against her hip where her service weapon rested. Three years ago, she might have called this routine—unusual, certainly, but still within the comfortable boundaries of metropolitan police work. But that was before Morris disappeared into thin air during that warehouse raid in Hackney. Before she started seeing the patterns no one else seemed to notice. They reached a landing that opened into what had once been a Tube platform. The space stretched out before her, cavernous and eerily intact despite being absent from any official Transport for London maps. Arc lights had been set up, casting harsh shadows across a scene that made Quinn's jaw clench. "Detective Quinn. Wasn't sure they'd send you." The forensic technician glanced up from where he knelt beside what appeared to be a market stall—one of dozens arranged in neat rows throughout the platform. "Kowalski called it in specifically for me," Quinn replied, scanning the platform. The stalls were empty now, but clearly designed to display wares. Some had glass cases, others hooks for hanging merchandise. "Where is she?" "Far end. By the oddities section, she called it." The tech's tone suggested skepticism. Quinn made her way through the abandoned market, noting the layout with professional precision. This wasn't some impromptu homeless encampment or teen hangout. The stalls were well-constructed, the walkways between them evenly spaced. Electrical wiring ran along the ceiling, connecting to fixtures above each stall. Someone had invested considerable time and resources into this place. She found Eva Kowalski crouched beside a fallen display case, her curly red hair pulled back in a messy ponytail. The young woman's green eyes widened as she spotted Quinn approaching. "You came," she said, relief evident in her voice. "You said it was important." Quinn knelt beside her, examining the broken glass. "When did you get clearance to consult on crime scenes?" Eva tucked a strand of hair behind her left ear, a nervous gesture Quinn had noticed during their previous encounters. "I didn't, exactly. I was called in to identify some artifacts from the museum's collection. But then I saw..." She gestured around them. "This isn't just some abandoned station someone repurposed. This is the Veil Market." Quinn kept her expression neutral. "The what?" "The Veil Market. It's...well, it's supposed to be a myth. An underground black market for..." Eva lowered her voice, "...supernatural items." Three years ago, Quinn would have requested a different consultant. Now, she simply asked, "What makes you so sure?" Eva opened her worn leather satchel, pulling out a small notebook. "The layout matches accounts from the 1850s, when occultist Thomas Blackwood claimed to have visited it. The organization of stalls by type of merchandise—charms, potions, artifacts, information. And then there's this." She pointed to an inscription carved into the stone floor near the broken display case. Quinn leaned closer, brushing away dust to reveal a series of symbols she didn't recognize. "What does it mean?" "It's a protection ward. To prevent tracking by conventional methods." Eva pushed her round glasses up her freckled nose. "Someone broke through it deliberately." Quinn stood, surveying the scene with new eyes. "You're saying what happened here wasn't just a break-in." "It was an invasion," Eva confirmed. "Someone wanted something specific." Quinn's attention shifted to the display case itself. Unlike the others, which were constructed of wood and glass, this one was made entirely of brass, now dented and forced open. "What was in here?" Eva hesitated. "According to inventory markings, a Veil Compass." "Which is?" "A navigation tool. It points toward places where the barrier between worlds is thin." Eva's voice dropped further. "Detective, whoever took it knows what they're doing. The Veil Market moves locations every full moon—that's tonight. This wasn't random. Someone's tracking something that shouldn't be tracked." Quinn straightened up, her watch catching the light as she checked the time. Four hours until sundown. "Show me what else you've found." They spent the next hour examining the market stalls. Quinn noticed Eva moved with surprising familiarity through the space, identifying the purpose of different sections with confidence that suggested more than academic knowledge. "You've been here before," Quinn said finally, not a question but an observation. Eva's cheeks flushed. "For research purposes only. I've never purchased anything." "But you know how to gain entry." Quinn touched the strange symbol carved into a post that marked the market's entrance. "What did you call it? A bone token?" Eva's eyes widened. "How did you—" "You mentioned it when describing the security measures," Quinn lied smoothly. In truth, she'd reviewed the files Eva had provided for previous cases—files that mentioned the token requirement in margin notes the young researcher probably hadn't intended to share. "Detective Quinn!" A voice called from across the platform. One of the forensic techs waved her over. "Stay here," Quinn instructed Eva before making her way to where the tech stood beside what appeared to be an office area. "We found something unusual," the tech said, leading her behind a heavy curtain. "Initial assessment suggested this was just administrative space for the market operators, but we found this." A large map of London covered one wall, with colored pins stuck in various locations. Red strings connected some pins to others, creating a web across the city. Quinn recognized many of the locations—sites of unexplained incidents over the past five years. The incidents her superiors had insisted were unrelated. "There's more," the tech said, pointing to a desk drawer they'd forced open. Inside lay a file labeled with a single name: DS Morris. Quinn's blood went cold. "Did you read it?" "Just enough to see it was police personnel information. Thought you should handle it." Quinn nodded, dismissing the tech before opening the file. Inside were surveillance photos of her former partner, dated weeks before his disappearance. Notes in a spidery hand detailed his movements, his habits, his investigation into a series of disappearances in East London. The final page held a single notation: "Too close to the Threshold. Removal authorized." She closed the file, tucking it inside her jacket. When she emerged from behind the curtain, she found the lead forensic technician arguing with Eva. "—absolutely not possible," the technician was saying. "The blood patterns clearly indicate the victim was standing here when attacked." "Then how do you explain the lack of gravitational droplets?" Eva challenged, pointing to the floor. "Blood spatter doesn't behave that way." Quinn approached, studying the scene. The technician had mapped out blood spray consistent with a slashing attack, but Eva was right—the pattern was wrong. There were no droplets falling vertically, as there should have been. "What's your explanation, Ms. Kowalski?" Quinn asked. Eva glanced nervously around before answering. "The attack didn't happen here. Or rather, it didn't happen in this physical space." She pointed to a residue Quinn hadn't noticed before—a silvery substance that formed a perfect circle on the floor. "The victim was pulled across the Veil while standing in this circle, attacked there, and then the evidence was pushed back through." The technician scoffed. "That's preposterous." Quinn knelt, examining the silvery residue. It reminded her of the strange substance they'd found on Morris's abandoned badge. The substance their lab had been unable to identify. "Run a full spectral analysis on this residue," Quinn ordered the technician. "And compare it to the unknown substance from case file MH-7319." "The Morris disappearance?" The technician looked confused. "But that was three years ago. How could they possibly be related?" Quinn straightened, her gaze meeting Eva's. The younger woman's expression confirmed what Quinn was beginning to suspect—that the thread connecting these cases went deeper than conventional investigation could reveal. "Test it anyway," Quinn said firmly. "And clear everyone out. I want to examine the scene without contamination." Once they were alone, Quinn turned to Eva. "You know more than you're telling me." Eva clutched her satchel tighter. "It's complicated." "My partner vanished into thin air three years ago," Quinn said, her voice hard. "His case file is in a secret office in an impossible market under London. I think I deserve some straight answers." Eva took a deep breath. "The Veil Market isn't just a black market. It's a meeting point—a place where those who know about the other realms can trade goods, information, services. Whoever stole the Veil Compass is looking for a way through the Threshold." "And what exactly is beyond this Threshold?" "I don't know exactly," Eva admitted. "But based on the artifacts I've cataloged at the museum... nothing human." Quinn's watch ticked loudly in the silence that followed. She thought of Morris, of his last words to her over the radio: "Quinn, something's wrong here. The shadows are moving." She had dismissed it then. She wouldn't make the same mistake again. "The full moon is in three hours," Quinn said finally. "If what you're saying is true, this market will relocate. We need to find that compass before then." Eva's eyes widened with surprise, then determination. "I know someone who might be able to help. But we'd be operating outside official channels." Quinn touched the file hidden inside her jacket. "I think we left official channels the moment we stepped into this place." Her sharp jaw set in a determined line. "Let's go."
created_at"2026-02-17T01:53:41.430767+00:00" 2/17/2026, 1:53:41 AM
model"anthropic/claude-3-7-sonnet-20250219"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency527
moderation_latency(null)
generation_time48259
tokens_prompt923
tokens_completion2716
native_tokens_prompt937
native_tokens_completion2319
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"
usage0.037596
router(null)
provider_responses
0
id"msg_01DX7RYoonKdoNDWoDpzXcpK"
status200
is_byokfalse
latency527
endpoint_id"1347c8dc-12f5-47df-8355-3ec7e80a8c67"
provider_name"Anthropic"
model_permaslug"anthropic/claude-3-7-sonnet-20250219"
api_type"completions"
id"gen-1771293172-N2C5MfRULQ0thHHPC0a3"
upstream_id"msg_01DX7RYoonKdoNDWoDpzXcpK"
total_cost0.037596
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"

Evaluation details

Result Evaluator Details Meta Data
45.6140% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags19
adverbTagCount5
adverbTags
0"Now, she simply asked, [simply]"
1"Quinn said finally, not a question but an observation [finally]"
2"Quinn lied smoothly [smoothly]"
3"Quinn said firmly [firmly]"
4"Quinn said finally [finally]"
87.8861% AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount1651
totalAiIsmAdverbs2
found
0
adverb"deliberately"
count1
1
adverb"nervously"
count1
highlights
0"deliberately"
1"nervously"
80.0000% AI-ism character names
Target: 0 AI-default names (17 tracked, −20% each)
codexExemptions(empty)
found
0"Blackwood"
100.0000% AI-ism location names
Target: 0 AI-default location names (33 tracked, −20% each)
codexExemptions(empty)
found(empty)
87.8861% AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount1651
totalAiIsms2
found
0
word"spectral"
count1
1
word"cataloged"
count1
highlights
0"spectral"
1"cataloged"
33.3333% Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches4
maxInWindow3
found
0
label"blood ran cold"
count1
1
label"eyes widened/narrowed"
count3
highlights
0"blood went cold"
1"eyes widened"
100.0000% Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells1
narrationSentences101
matches
0"looked confused"
100.0000% Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount2
hedgeCount4
narrationSentences101
filterMatches
0"watch"
hedgeMatches
0"seemed to"
1"appeared to"
2"tended to"
100.0000% Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount3
totalSentences137
matches
0"behave that way"
1"suspect—that the"
2"find that compass"
100.0000% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs63
mean25.95
std15.47
cv0.596
sampleLengths
043
116
223
367
451
533
635
714
855
931
109
1123
1256
137
1421
1519
1657
1719
1824
1917
2010
2134
229
232
2445
2523
2633
2713
2811
2929
306
3139
3217
3322
3429
3550
3624
378
3814
3956
4025
4119
4222
4335
447
4561
465
4728
4823
4919
100.0000% Passive voice overuse
Target: ≤5% passive sentences
passiveCount1
totalSentences101
matches
0"were constructed was made"
100.0000% Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount2
totalVerbs196
matches
0"was saying"
1"was beginning"
100.0000% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1018
adjectiveStacks0
stackExamples(empty)
adverbCount28
adverbRatio0.0275049115913556
lyAdverbCount17
lyAdverbRatio0.01669941060903733
100.0000% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences137
echoCount0
echoWords(empty)
100.0000% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences137
mean11.93
std7.6
cv0.636
sampleLengths
010
128
22
33
416
58
615
78
812
920
1015
1112
1214
1320
1417
1533
1612
1711
189
193
2014
2114
229
2310
2412
2510
2620
2711
289
2913
3010
3120
3223
3313
345
352
3621
3710
389
3911
4046
4115
424
4319
445
458
469
476
484
498
66.1800% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats6
diversityRatio0.4233576642335766
totalSentences137
uniqueOpeners58
3.9474% Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags19
fancyCount13
fancyTags
0"Quinn replied, scanning the platform (reply, scan)"
1"Eva lowered her voice (lower)"
2"Now, she simply asked, (simply ask)"
3"Eva confirmed (confirm)"
4"Quinn said finally, not a question but an observation (say finally)"
5"Quinn lied smoothly (lie smoothly)"
6"Quinn instructed Eva before making her way to where the tech stood beside what appeared to be an office area (instruct make stand appear be)"
7"the tech said, leading her behind a heavy curtain (say, lead behind)"
8"the tech said, pointing to a desk drawer they'd forced open (say, point force)"
9"Quinn ordered the technician (order)"
10"Quinn said firmly (say firmly)"
11"Eva admitted (admit)"
12"Quinn said finally (say finally)"
82.6381%