Run: 2026-05-01-01KQHSJ77K68Z3KZ0M9KVMDBXE

Run Details

Duration:
36.2s
Cost:
$0.006145
Provider:
xAI

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 abandoned Tube platform smelled of wet concrete, ozone, and something sharper—burnt wiring mixed with the metallic tang of blood. Detective Harlow Quinn stepped off the last rung of the service ladder and straightened her coat with military precision, the worn leather watch on her left wrist catching the harsh glare of the forensic spotlights. Forty-one years old and eighteen of them spent chasing shadows in the Metropolitan Police, yet this particular shadow felt different. Deeper. Wrong. The station had been sealed since the 1980s, its tunnels bricked off and forgotten by everyone except urban explorers and, apparently, the dead. Yellow crime-scene tape fluttered across the gaping mouth of the eastbound tunnel like a half-hearted warning. Someone had dragged portable generators down here; their diesel hum vibrated through the soles of her boots. “Quinn,” a voice called from the far end of the platform. She turned. DS Patel stood beside the body, notebook in hand, his dark eyes reflecting the cold lights. He looked relieved to see her, which told her the scene was as messy as the initial report suggested. Harlow crossed the platform in measured strides, her sharp jaw set. The victim lay sprawled near the tiled wall, half in shadow. Male, late twenties, expensive clothes now ruined by blood and filth. His throat had been opened with surgical neatness—almost too neat. The cut began just beneath the left ear and curved cleanly across the windpipe, stopping at the right carotid. Arterial spray painted the curved tiles in a wide arc, yet the blood on the floor around him was minimal. Too minimal. “Name’s Daniel Whitby,” Patel said without preamble. “Twenty-seven. Worked in finance. His wallet was still in his pocket—cards, cash, Oyster. No robbery.” Harlow crouched beside the corpse. The man’s eyes were open, fixed on the cracked ceiling as though surprised by his own death. She studied the wound again. The edges were cauterized in places, as if the blade had been heated. Yet no scorch marks on the surrounding skin. Strange. “What do you make of it?” she asked, voice low. Patel shrugged. “Gang hit, maybe. These tunnels are used by all sorts of people the council would rather forget. Rough sleepers, dealers, kids doing urban exploration videos. Could be territorial.” She said nothing. Instead, she reached into her coat and produced a pair of nitrile gloves, snapping them on with practiced efficiency. The platform felt too still. No rats. No water dripping from the ceiling pipes. Even the air seemed to hold its breath. Her gaze drifted across the tiled wall above the body. Most of the old Underground roundel had been smashed away decades ago, but something else had been carved into the ceramic. Three interlocking circles, each containing a symbol she didn’t recognise. They looked freshly cut; the grooves were clean, no grime inside them yet. “See these?” She pointed. Patel leaned in. “Graffiti. Probably here before the murder.” “No.” Harlow traced one circle with a gloved finger, not touching the mark. “The blood spray stops exactly at the edge of the lowest symbol. Whatever made these marks was done after he died. Or during.” She stood, knees popping slightly, and scanned the rest of the platform. Her eyes narrowed at a dark patch near the service door. She walked over, boots echoing. The concrete there was scorched in a perfect circle roughly two metres across. Within the burn mark, the dust had been arrangeddeliberately—into the same three-circle pattern. “Patel. Torch.” He handed her a Maglite. She swept the beam across the scorched area. Tiny fragments glinted—shards of green glass, or perhaps crystal. She picked one up. It was warm. “This isn’t gang-related,” she murmured. Patel rubbed the back of his neck, a nervous tell she’d learned to read years ago. “Look, Quinn. I know you’ve been… sensitive about weird scenes since Morris. But sometimes a throat-slashing is just a throat-slashing. We’ve got no witnesses, no CCTV down here, and the only prints we’ve lifted so far belong to the victim and what looks like a woman’s size six boot. Could be his girlfriend. Could be nothing.” Harlow didn’t answer immediately. The name Morris still landed like a blade between her ribs. Three years ago her partner had disappeared during an investigation into a series of ritualistic killings in Whitechapel. The official report said he’d gone rogue. Harlow knew better. She had seen the symbols at his last known location—the same three interlocking circles. She had smelled the same ozone. No one had believed her then. She believed herself now. She moved along the platform edge, keeping her footsteps light. Something crunched under her heel. She crouched again and found a small brass object half-buried in the grime. A compass. Its casing was tarnished with verdigris, the face etched with symbols that matched the ones on the wall. The needle spun lazily, even though the device lay flat. It refused to settle on north. Harlow turned it over. On the back, tiny letters had been engraved: *Property of E. Kowalski.* Her pulse quickened. She knew that name. Eva Kowalski. Childhood friend of Aurora Vale, the woman who had been hovering at the edges of three of Harlow’s strangest cases in the last eighteen months. The same Eva Kowalski who worked in the British Museum’s restricted archives and who had been questioned—but never charged—after a warehouse fire in Shoreditch that left behind melted iron and the scent of myrrh. Harlow slipped the compass into an evidence bag, sealing it with deliberate care. “Patel,” she said without looking up. “You said size six boot prints. Where exactly?” “Leading from the body to the tunnel mouth, then they vanish. Like she stepped off the platform into thin air.” “Or into something else.” He gave her the look she hated—the one that said he was worried about her mental state. “Boss, it’s an old Tube station. Tracks were lifted years ago. There’s nothing down there but rats and collapsed masonry.” Harlow ignored him and walked to the tunnel entrance. The darkness beyond the police lights felt thicker than it should, almost viscous. She swept her own torch across the ground. The boot prints were clear for six metres, small and precise, the tread pattern suggesting expensive leather rather than rubber. Then, abruptly, they stopped. No scuff marks. No indication of a struggle or a jump. Just… absence. She shone the light deeper. About fifteen metres in, something reflected back at her. Silver. She stepped past the tape. “Quinn, the structural survey said—” “I know what it said.” The tunnel smelled stronger here. Not just blood and concrete—incense. Myrrh again. And beneath it, something like lightning after a storm. Her skin prickled. The silver object was a small pendant, snapped from its chain. She bagged it. On one side was engraved the same three-circle motif. On the other, a single word in delicate script: *Veil*. Harlow’s mind turned over the details like a lockpick set. The cauterised wound suggested a blade that burned without flame. The scorched circle on the platform was perfectly geometric, impossible to achieve with accelerant in the time the murder must have taken. The compass that refused to point north. The boot prints that ended in nothing. And now this pendant, linked to a word she had only ever seen in connection with rumours—whispers from her confidential informants who dealt in things that shouldn’t exist. She thought of Eva Kowalski’s face the one time they had met: round glasses, curly red hair always being tucked behind her left ear, a worn leather satchel bulging with books that looked far older than any museum would permit on open shelves. Harlow had dismissed her then as a harmless eccentric. She wasn’t feeling so dismissive now. When she returned to the platform, Patel was directing the photographer. The flash lit the dead man’s face in stark white, freezing his final surprise forever. “Call in SOCO for a full trace on those symbols,” she told him. “And I want the names of every urban explorer who’s posted footage of this station in the last two years. Cross-reference with known associates of Eva Kowalski.” Patel’s eyebrows rose. “The museum woman? The one who gave us nothing but polite smiles last time we brought her in?” “The same.” He hesitated. “You really think this is connected to… whatever happened with Morris?” Harlow met his gaze steadily. The station’s silence pressed against her eardrums. For a moment she could almost hear her dead partner’s voice, low and cautious: *Some doors you open, Harlow. Some doors open you.* “I don’t think,” she said. “I observe. The evidence doesn’t add up because we’re looking at it with the wrong map. This wasn’t a murder committed in this world alone.” Patel opened his mouth, closed it again. He had learned not to argue when her voice took on that particular flat certainty. She looked once more at the three circles burned into the concrete. They seemed to stare back at her, patient and ancient. The compass in her coat pocket grew warm against her ribs, as though in agreement. Harlow Quinn straightened her shoulders, feeling the familiar weight of the leather watch on her wrist like an anchor to a reality that was rapidly fraying at the edges. Somewhere in this city, Eva Kowalski was carrying answers in that battered satchel of hers. Somewhere nearby, a door that should not exist had been opened just wide enough to let violence through. She intended to find that door. And she intended to walk through it.
created_at"2026-05-01T12:52:35.704Z" 5/1/2026, 12:52:35 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency387
moderation_latency(null)
generation_time36118
tokens_prompt923
tokens_completion2552
native_tokens_prompt932
native_tokens_completion2019
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached64
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.0061453
router(null)
provider_responses
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endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"b648cd9a-89e4-5e47-298d-d2cdde804e89"
is_byokfalse
latency114
model_permaslug"x-ai/grok-4.20-20260309"
provider_name"xAI"
status200
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request_id"req-1777639955-6XAXCKclDduhshcjJFAd"
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api_type"completions"
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upstream_id"b648cd9a-89e4-5e47-298d-d2cdde804e89"
total_cost0.0061453
cache_discount0.0000672
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags9
adverbTagCount0
adverbTags(empty)
dialogueSentences26
tagDensity0.346
leniency0.692
rawRatio0
effectiveRatio0
84.40% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1603
totalAiIsmAdverbs5
found
0
adverb"slightly"
count1
1
adverb"deliberately"
count1
2
adverb"lazily"
count1
3
adverb"perfectly"
count1
4
adverb"really"
count1
highlights
0"slightly"
1"deliberately"
2"lazily"
3"perfectly"
4"really"
80.00% AI-ism character names
Target: 0 AI-default names (17 tracked, −20% each)
codexExemptions(empty)
found
0"Patel"
100.00% AI-ism location names
Target: 0 AI-default location names (33 tracked, −20% each)
codexExemptions(empty)
found(empty)
46.97% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1603
totalAiIsms17
found
0
word"fluttered"
count1
1
word"vibrated"
count1
2
word"measured"
count1
3
word"traced"
count1
4
word"scanned"
count1
5
word"echoing"
count1
6
word"perfect"
count1
7
word"crystal"
count1
8
word"footsteps"
count1
9
word"etched"
count1
10
word"pulse"
count1
11
word"quickened"
count1
12
word"charged"
count1
13
word"stark"
count1
14
word"silence"
count1
15
word"familiar"
count1
16
word"weight"
count1
highlights
0"fluttered"
1"vibrated"
2"measured"
3"traced"
4"scanned"
5"echoing"
6"perfect"
7"crystal"
8"footsteps"
9"etched"
10"pulse"
11"quickened"
12"charged"
13"stark"
14"silence"
15"familiar"
16"weight"
100.00% Cliché density
Target: ≤1 cliche(s) per 800-word window
totalCliches1
maxInWindow1
found
0
label"eyes widened/narrowed"
count1
highlights
0"eyes narrowed"
100.00% Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells2
narrationSentences131
matches
0"looked relieved"
1"was worried"
77.43% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount2
hedgeCount4
narrationSentences131
filterMatches
0"watch"
hedgeMatches
0"seemed to"
1"tended to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences148
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen58
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans3
markdownWords14
totalWords1591
ratio0.009
matches
0"Property of E. Kowalski."
1"Veil"
2"Some doors you open, Harlow. Some doors open you."
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions16
unquotedAttributions0
matches(empty)
91.68% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions46
wordCount1286
uniqueNames17
maxNameDensity1.17
worstName"Harlow"
maxWindowNameDensity2
worstWindowName"Harlow"
discoveredNames
Tube1
Harlow15
Quinn2
Metropolitan1
Police1
Patel8
Underground1
Maglite1
Morris1
Whitechapel1
Kowalski5
Aurora1
Vale1
Eva4
British1
Museum1
Shoreditch1
persons
0"Harlow"
1"Quinn"
2"Patel"
3"Morris"
4"Kowalski"
5"Eva"
6"Museum"
places
0"Metropolitan"
1"Whitechapel"
2"British"
3"Shoreditch"
globalScore0.917
windowScore1
89.02% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences82
glossingSentenceCount2
matches
0"explorers and, apparently, the dead"
1"something like lightning after a storm"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1591
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount2
totalSentences148
matches
0"knew that name"
1"find that door"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs53
mean30.02
std23.95
cv0.798
sampleLengths
077
156
211
337
484
522
649
710
830
944
1054
114
129
1336
1454
152
1629
175
1872
1969
204
2164
2216
233
244
2561
2613
2714
2820
294
3037
3167
3220
335
345
3524
3633
3784
3843
399
406
4126
4240
4321
442
4513
4635
4730
4822
4937
75.80% Passive voice overuse
Target: ≤2% passive sentences
passiveCount11
totalSentences131
matches
0"been sealed"
1"been opened"
2"were cauterized"
3"been heated"
4"been smashed"
5"been carved"
6"was scorched"
7"been arranged"
8"been engraved"
9"been questioned"
10"was engraved"
11"being tucked"
12"been opened"
71.18% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount4
totalVerbs207
matches
0"wasn’t feeling"
1"was directing"
2"was rapidly fraying"
3"was carrying"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount11
semicolonCount2
flaggedSentences11
totalSentences148
ratio0.074
matches
0"The abandoned Tube platform smelled of wet concrete, ozone, and something sharper—burnt wiring mixed with the metallic tang of blood."
1"Someone had dragged portable generators down here; their diesel hum vibrated through the soles of her boots."
2"His throat had been opened with surgical neatness—almost too neat."
3"They looked freshly cut; the grooves were clean, no grime inside them yet."
4"Within the burn mark, the dust had been arranged—deliberately—into the same three-circle pattern."
5"Tiny fragments glinted—shards of green glass, or perhaps crystal."
6"She had seen the symbols at his last known location—the same three interlocking circles."
7"The same Eva Kowalski who worked in the British Museum’s restricted archives and who had been questioned—but never charged—after a warehouse fire in Shoreditch that left behind melted iron and the scent of myrrh."
8"He gave her the look she hated—the one that said he was worried about her mental state."
9"Not just blood and concrete—incense."
10"And now this pendant, linked to a word she had only ever seen in connection with rumours—whispers from her confidential informants who dealt in things that shouldn’t exist."
94.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1303
adjectiveStacks1
stackExamples
0"left behind melted iron"
adverbCount49
adverbRatio0.03760552570990023
lyAdverbCount14
lyAdverbRatio0.010744435917114352
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences148
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences148
mean10.75
std8.59
cv0.799
sampleLengths
020
135
220
31
41
523
616
717
811
92
1016
1119
1211
1311
1411
1510
1619
1720
182
197
2015
215
2217
235
2413
258
261
2710
282
2928
303
3119
325
332
347
358
3610
3721
3810
3913
404
413
426
4313
4423
4512
4611
475
4813
4913
62.39% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats11
diversityRatio0.4189189189189189
totalSentences148
uniqueOpeners62
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount5
totalSentences113
matches
0"Instead, she reached into her"
1"Even the air seemed to"
2"Then, abruptly, they stopped."
3"Somewhere in this city, Eva"
4"Somewhere nearby, a door that"
ratio0.044
89.03% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount37
totalSentences113
matches
0"He looked relieved to see"
1"His throat had been opened"
2"She studied the wound again."
3"she asked, voice low"
4"She said nothing."
5"Her gaze drifted across the"
6"They looked freshly cut; the"
7"She stood, knees popping slightly,"
8"Her eyes narrowed at a"
9"She walked over, boots echoing."
10"He handed her a Maglite."
11"She swept the beam across"
12"She picked one up."
13"It was warm."
14"She had seen the symbols"
15"She had smelled the same"
16"She believed herself now."
17"She moved along the platform"
18"She crouched again and found"
19"Its casing was tarnished with"
ratio0.327
88.32% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount84
totalSentences113
matches
0"The abandoned Tube platform smelled"
1"Detective Harlow Quinn stepped off"
2"The station had been sealed"
3"Someone had dragged portable generators"
4"a voice called from the"
5"DS Patel stood beside the"
6"He looked relieved to see"
7"Harlow crossed the platform in"
8"The victim lay sprawled near"
9"His throat had been opened"
10"The cut began just beneath"
11"Patel said without preamble"
12"Harlow crouched beside the corpse."
13"The man’s eyes were open,"
14"She studied the wound again."
15"The edges were cauterized in"
16"she asked, voice low"
17"She said nothing."
18"The platform felt too still."
19"Her gaze drifted across the"
ratio0.743
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences113
matches(empty)
ratio0
58.11% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences59
technicalSentenceCount7
matches
0"The man’s eyes were open, fixed on the cracked ceiling as though surprised by his own death."
1"Childhood friend of Aurora Vale, the woman who had been hovering at the edges of three of Harlow’s strangest cases in the last eighteen months."
2"The same Eva Kowalski who worked in the British Museum’s restricted archives and who had been questioned—but never charged—after a warehouse fire in Shoreditch …"
3"And now this pendant, linked to a word she had only ever seen in connection with rumours—whispers from her confidential informants who dealt in things that shou…"
4"She thought of Eva Kowalski’s face the one time they had met: round glasses, curly red hair always being tucked behind her left ear, a worn leather satchel bulg…"
5"The compass in her coat pocket grew warm against her ribs, as though in agreement."
6"Harlow Quinn straightened her shoulders, feeling the familiar weight of the leather watch on her wrist like an anchor to a reality that was rapidly fraying at t…"
13.89% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags9
uselessAdditionCount2
matches
0"she asked, voice low"
1"Harlow traced, not touching the mark"
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags7
fancyCount1
fancyTags
0"she murmured (murmur)"
dialogueSentences26
tagDensity0.269
leniency0.538
rawRatio0.143
effectiveRatio0.077
80.7406%