Run: 2026-02-17-01KHMMN7HFTJY89VKAQCK8TT7P

Run Details

Duration:
48.7s
Cost:
$0.038466
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 brass needle swung north, trembled, then reoriented toward an impossible direction that existed in no earthly compass rose. Detective Harlow Quinn clicked her tongue against her teeth in irritation, tucked the small compass back into her coat pocket, and snapped on a fresh pair of nitrile gloves. "This is the third one in as many weeks," said Sergeant Whitley, his flashlight beam skittering across the damp tunnel walls. "Pattern's the same. No blood, no signs of struggle, just—" "Just a body that shouldn't be here," Quinn finished for him, stepping carefully around the corpse sprawled on the abandoned platform. The victim lay face-up, arms and legs arranged with unnatural precision, as if positioned by a mortician rather than dropped by a killer. Male, late thirties, well-dressed in a charcoal suit that probably cost more than Quinn's monthly salary. No visible wounds, no obvious cause of death. And they were far deeper underground than any civilian had a right to be. "Metropolitan Line maps show this station was sealed in 1932," Quinn said, her flashlight beam illuminating faded tile work. "No official access point. Yet our friend here found his way in somehow." "Urban explorers get everywhere these days," Whitley suggested with a shrug. "YouTube fame is a powerful motivator. Probably just some city boy who got lost and had a heart attack." Quinn's gaze traveled past her colleague to the peculiar markings on the wall behind him—chalk symbols hastily wiped away but still faintly visible under her flashlight's harsh glare. She made no comment on them, merely logged the detail in her mental casefile. "Maybe." Her tone made it clear she thought otherwise. She knelt beside the body, conscious of the worn leather watch on her left wrist ticking away the minutes. CSI would arrive soon enough, but Quinn had learned to trust her own observations first. The body was cool but not cold, rigor just beginning to set in. "No wallet, no ID," Whitley added. "Maintenance worker spotted feet sticking out when checking for flooding after yesterday's rain." Quinn nodded absently, attention fixed on the victim's right hand. Clutched between stiffened fingers was a sliver of what looked like polished bone, carved with intricate patterns too deliberate to be natural. A token of some kind. She pocketed it without Whitley noticing. "Those new shoes of yours are going to be ruined," Whitley observed, gesturing at the puddles of stagnant water. "Should've worn your boots." "These tunnels shouldn't be flooded," Quinn said, ignoring his comment. "We're above the water table here, and there's no rain infiltration I can see. So where's this coming from?" Before Whitley could answer, the sound of voices echoed from the service tunnel where they'd entered. The forensic team had arrived. "I'll brief them," Whitley offered, already turning away. "Do that," Quinn replied, waiting until he was out of earshot before removing the brass compass once more. The needle spun wildly now, as if proximity to the body had disturbed whatever mechanism guided it. It wasn't standard police equipment—Eva had pressed it into her hands three days ago with an urgency that Quinn had initially dismissed. "You'll need this, Harry. Things are breaking through in the old places." Quinn had scoffed then, but now, standing in a sealed tunnel with a bloodless corpse at her feet and symbols on the walls, Eva's warnings seemed less like paranoid fantasy. The forensic techs swarmed in, setting up portable lights that chased shadows into corners. Quinn stepped back to give them room, but not before noticing something else—a faint discoloration on the victim's throat, visible only when the light hit it just right. Not bruising, not petechiae. Almost like... frost. Her phone vibrated in her pocket. Eva's number. "Not a good time," Quinn answered in a low voice, moving away from the activity. "Where are you?" Eva's voice crackled with static. "The compass—is it moving?" "How did you know I'd bring it?" "Because you're thorough." There was no trace of Eva's usual nervousness. "Listen carefully. If the needle won't settle, you're standing at an entry point." "Entry to what, exactly?" "The Veil Market. It's been using the abandoned tube network this lunar cycle." Eva's words tumbled out rapidly. "If you've found another body, it means someone's trafficking in permits." Quinn's gaze drifted to the bone token in her pocket. "Permits?" "Entry tokens. They're supposed to be temporary passes for humans, but someone's been selling counterfeits. They dissolve after passage, leaving the holders stranded between realms." "Eva, slow down. You're not making sense." A tech called over to her: "Detective? We've got something strange here." "I have to go," Quinn said into the phone. "Wait! Don't let them move the body until—" Quinn ended the call, tucking the phone away as she rejoined the forensic team. They had rolled the victim onto his side, revealing a peculiar marking on the back of his neck: a symbol that matched one of those partially erased from the wall. "Some kind of tattoo?" suggested the tech. "New, by the look of it." Quinn frowned. "That's not a tattoo. It's a brand." The tech looked up, startled. "Who brands people these days?" Quinn didn't answer. Her attention had been caught by something else—a glint of metal half-submerged in a puddle near where the body had lain. She fished it out with a gloved hand. A small key, ornately designed with an unfamiliar crest. "Bag this," she instructed, handing it to the nearest tech. "And I want detailed photographs of all these wall markings before they're disturbed." "What markings?" asked the tech, looking confused as he glanced at the walls. Quinn turned sharply, shining her light where the symbols had been moments before. The wall was blank—completely clean, as if freshly washed. "There were chalk marks right there," she insisted. "Symbols, half a dozen of them." The tech looked doubtful. "Maybe a trick of the light, ma'am. These old tunnels play havoc with shadows." Quinn stared at the now-pristine wall, jaw tightening. This wasn't the first time evidence had vanished in these cases. Whitley reappeared at her side. "ME's here. Says cause of death appears to be hypothermia, if you can believe that. Underground, in August." "I need to make a call," Quinn said abruptly. Outside the immediate crime scene, in a quiet curve of tunnel, Quinn dialed Eva back. "The markings disappeared," she said without preamble when Eva answered. "Right in front of me. And the ME thinks he froze to death." "Veil-frost," Eva confirmed, voice hushed despite being on the other end of the line. "It happens when humans can't metabolize the atmospheric differences. Where exactly are you?" "Abandoned station beneath Camden. Supposedly sealed for nearly a century." Eva's sharp intake of breath was audible. "That fits. The Market's been circling closer to populated areas lately. Harry, you need to get out of there before moonrise." "I'm in the middle of a crime scene, Eva." "That place isn't just a crime scene. It's an active transit point. The full moon is tonight, and when it rises, the Market will shift locations again." Quinn checked her watch. "That's hours away." "Time works differently at threshold points. Just—be careful. And keep the compass with you." After ending the call, Quinn stood motionless, weighing her options. Three bodies in three weeks, all discovered in supposedly inaccessible locations, all without obvious cause of death. And now this talk of markets and thresholds and counterfeited bone tokens. It sounded like madness. It sounded like the kind of paranormal nonsense that had caused her to request a transfer away from DS Morris in the weeks before his disappearance. Yet something had etched those symbols into the wall before erasing them. Something had branded a mark into the victim's flesh. Something had caused a healthy man to freeze to death in an abandoned tunnel in the middle of summer. Quinn removed the compass from her pocket once more. The needle now pointed steadily toward what appeared to be a solid wall at the far end of the platform. Decision made, she walked back to where Whitley supervised the scene. "I need to check something. Tell the ME not to move the body until I return." "Where are you going?" Whitley called after her. Quinn didn't answer, already moving toward where the compass directed. The wall ahead looked ordinary enough—dirty tiles, decades of grime, a few patches of moss where moisture seeped through. But as she approached, compass extended before her like a divining rod, Quinn noticed how the shadows seemed to deepen unnaturally in one specific area. The needle pressed flat against the compass glass, pointing directly at that darkness. Quinn reached out, expecting to touch cold tile. Instead, her hand passed through what should have been solid wall, encountering only a chill resistance, like pushing through heavy curtains. She withdrew quickly, heart pounding. Behind her, voices from the crime scene seemed suddenly distant, as if heard through water. The brass compass in her palm grew cold enough to sting. This wasn't possible. And yet... The bone token in her pocket seemed to pulse with a faint warmth, countering the unnatural cold of the compass. Quinn understood suddenly why these victims had been found as they were—not murdered in the conventional sense, but abandoned. Left behind when their counterfeit tokens failed. She thought of Eva's warnings. Of DS Morris, who had vanished while investigating reports of impossible trading in London's forgotten spaces. Of three bodies with no cause of death that modern medicine could explain. Quinn took a step back from the shadowed wall, pocketed the compass, and turned toward the crime scene. She had always prided herself on seeing what others missed. Now she realized how much she had been missing herself. It was time to pay Eva a visit at the British Museum. And to finally hear everything her friend knew about the Veil Market.
created_at"2026-02-17T01:51:12.918093+00:00" 2/17/2026, 1:51:12 AM
model"anthropic/claude-3-7-sonnet-20250219"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency393
moderation_latency(null)
generation_time48641
tokens_prompt923
tokens_completion2651
native_tokens_prompt937
native_tokens_completion2377
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"
usage0.038466
router(null)
provider_responses
0
id"msg_01HduWJZC548ck1bSD1rQsyf"
status200
is_byokfalse
latency393
endpoint_id"1347c8dc-12f5-47df-8355-3ec7e80a8c67"
provider_name"Anthropic"
model_permaslug"anthropic/claude-3-7-sonnet-20250219"
api_type"completions"
id"gen-1771293023-GPim86Oi8K5hxk5QupFs"
upstream_id"msg_01HduWJZC548ck1bSD1rQsyf"
total_cost0.038466
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"

Evaluation details

Result Evaluator Details Meta Data
59.2593% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags18
adverbTagCount4
adverbTags
0"Quinn finished for him, stepping carefully around the corpse sprawled on the abandoned platform [carefully]"
1"Whitley offered, already turning away [already away]"
2"Quinn replied, waiting until he was out of earshot before removing the brass compass once more [once more]"
3"Quinn said abruptly [abruptly]"
57.8821% AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount1662
totalAiIsmAdverbs7
found
0
adverb"carefully"
count2
1
adverb"completely"
count1
2
adverb"quickly"
count1
3
adverb"sharply"
count1
4
adverb"suddenly"
count2
highlights
0"carefully"
1"completely"
2"quickly"
3"sharply"
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)
63.8989% AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount1662
totalAiIsms6
found
0
word"glint"
count1
1
word"trembled"
count1
2
word"pristine"
count1
3
word"intricate"
count1
4
word"echoed"
count1
5
word"etched"
count1
highlights
0"glint"
1"trembled"
2"pristine"
3"intricate"
4"echoed"
5"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
narrationSentences102
matches(empty)
100.0000% Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount2
hedgeCount3
narrationSentences102
filterMatches
0"watch"
hedgeMatches
0"appeared to"
1"seemed to"
100.0000% Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount2
totalSentences134
matches
0"\"Do that,\" Quinn"
1"believe that. Underground"
100.0000% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs74
mean22.27
std12.9
cv0.579
sampleLengths
048
131
221
347
414
532
630
742
89
947
1019
1137
126
1323
1429
1521
168
1718
1839
1912
2030
2149
228
2315
2412
257
2624
274
2829
2911
3025
317
3212
339
348
3544
3613
379
3810
3932
409
4123
4213
4322
4414
4518
4624
4718
489
4915
100.0000% Passive voice overuse
Target: ≤5% passive sentences
passiveCount2
totalSentences102
matches
0"been caught"
1"been found"
100.0000% Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount0
totalVerbs211
matches(empty)
91.6114% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1176
adjectiveStacks0
stackExamples(empty)
adverbCount55
adverbRatio0.0467687074829932
lyAdverbCount27
lyAdverbRatio0.02295918367346939
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
mean12.3
std6.74
cv0.548
sampleLengths
019
129
221
310
421
523
616
78
814
919
1013
1111
1219
1328
1414
159
1619
1715
1813
196
2013
2110
2222
235
246
2519
264
2710
2819
2916
305
318
3218
3317
3422
3512
3630
3714
3828
394
402
411
426
432
4415
458
464
477
4811
4913
81.0945% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats3
diversityRatio0.5
totalSentences134
uniqueOpeners67
0.0000% Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags18
fancyCount14
fancyTags
0"said Sergeant Whitley, his flashlight beam skittering across the damp tunnel walls (say skitter)"
1"Quinn finished for him, stepping carefully around the corpse sprawled on the abandoned platform (finish step carefully sprawl)"
2"Whitley suggested with a shrug (suggest)"
3"Whitley added (add)"
4"Whitley observed, gesturing at the puddles of stagnant water (observe, gesture)"
5"Quinn said, ignoring his comment (say, ignore)"
6"Whitley offered, already turning away (offer, already turn away)"
7"Quinn replied, waiting until he was out of earshot before removing the brass compass once more (reply, wait be remove)"
8"Quinn answered in a low voice, moving away from the activity (answer move away)"
9"she instructed, handing it to the nearest tech (instruct, hand)"
10"she insisted (insist)"
11"Quinn said abruptly (say abruptly)"
12"she said without preamble when Eva answered (say answer)"
13"Eva confirmed, voice hushed despite being on the other end of the line (confirm, hush be)"
85.5145%