Run: 2026-06-01-01KT1HJXKK14DAYJW5TQWF82E2

Run Details

Duration:
37.9s
Cost:
$0.057725
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="4412" name="Aurora Carter" aliases="Rory, Laila, Aurora, Carter, Malphora" pronouns="she/her" species="Human" storyRole="Protagonist"> <eyeColor>bright blue</eyeColor> <hair>straight shoulder-length black</hair> <height>5'6"</height> <age>25</age> <scar>small crescent-shaped scar on her left wrist from a childhood accident</scar> <description>Aurora, referred to by her friends as Rory, is cool-headed, intelligent, and known for quick out-of-the-box thinking.</description> <backstory>Born in Cardiff to an Irish barrister father (Brendan Carter) and Welsh teacher mother (Jennifer Carter née Ellis), Rory reluctantly pursued Pre-Law at Cardiff University. She fled to London at the behest of her childhood friend Eva after leaving an abusive ex named Evan. By day, Rory works part-time as a delivery person for Yu-Fei Cheung's Golden Empress restaurant. She lives in a flat above Silas' bar.</backstory> </character> <location id="861" name="The Fae Grove" aliases="Isolde's grove, Richmond grove, the Grove" realm="Earth (Fae-touched)"> <parkLocation>Richmond Park</parkLocation> <standingStones>ancient oak standing stones mark the boundary</standingStones> <timeBehavior>time moves differently — an hour inside can be minutes or days outside</timeBehavior> <flora>wildflowers bloom year-round</flora> <description>A hidden clearing that exists in a pocket between Earth and the Fae realm.</description> </location> <item id="2001" name="Heartstone Pendant" aliases="the pendant, Heartstone" type="Artifact" origin="Dymas"> <gemstoneColor>deep crimson</gemstoneColor> <chainMaterial>silver chain</chainMaterial> <size>roughly the size of a thumbnail</size> <behavior>pulses faintly with warmth when near a Hel portal</behavior> <glow>faint inner glow</glow> <description>Given to Aurora by an unknown benefactor.</description> </item> </codex> Write a fully fleshed out scene of at least 1000 words in the horror genre. A character is alone in a strange, isolated place at night. They came here for a reason, but something feels off from the moment they arrive. The wrongness builds slowly — sounds that shouldn't be there, things that move at the edge of vision, a growing certainty that they are not alone. Build tension through restraint, not through gore. Use the codex entries above as your world reference for the character and setting. Only include the prose of the scene without any markdown or commentary.

Model response

AI
The text Eva had sent was three words long: Richmond Park. Midnight. Rory had read it a dozen times on the bus out from the city, until the letters lost their meaning and became only shapes, the way a word does when you stare at it too long. Now, standing at the edge of the tree line with her phone dead in her pocket and the gates of the park long shut behind her, she wished she'd asked more questions. She'd asked one, at least. Why there? And Eva had answered, in that bright voice that never quite hid the thing underneath it: Because it's the only place he can't follow. He. They never said his name aloud anymore. Evan. Even now the syllable made something tighten in Rory's chest, a reflex she'd thought she'd trained out of herself in London. She pulled her jacket closer and stepped past the last of the maintained lawn into the older part of the park, where the grass grew long and the oaks stood like men who had stopped walking a thousand years ago. She found the standing stones almost by accident. They weren't stones, not really — they were oaks, but oaks gone wrong, their trunks twisted into pillars and arranged in a rough ring, bark grey and smooth as old bone in the moonlight. Between them the air seemed to thicken. She'd been here once before, with Eva, in daylight, and it had felt like stepping into a held breath. Now, at midnight, it felt like the breath was about to be let out. "Eva?" Her voice came out smaller than she meant it to. No answer. Only the wind moving in the high branches, except — she stopped. The wind was moving in the branches, but it wasn't touching her face. The leaves above her hissed and rolled like surf, and down here the air was perfectly, glassily still. Rory told herself there were a hundred reasons for that. Wind shadow. The lay of the land. She wasn't a scientist; she didn't have to understand it. She stepped between two of the pale trunks and into the grove. The temperature changed first. Not colder — warmer, a soft summer warmth that had no business in a London October, and with it came the smell of flowers. She looked down and saw them: wildflowers, hundreds of them, blooming in the dark as though it were noon in June. Foxglove and meadowsweet and others she had no names for, their petals glowing faintly with their own light. It should have been beautiful. Some animal part of her brain read it as wrong, and the hair rose along her arms. "Eva, this isn't funny." Louder now. "I came. I'm here. Where are you?" The flowers swallowed her voice. That was the only way she could describe it — the words left her mouth and did not travel, did not echo, did not seem to reach even the nearest tree. It was like speaking into a pillow pressed against her face. Something moved at the edge of her vision. She turned fast. Nothing. Only the ring of pale trunks and the glowing meadow and the moon, too large and too low, hanging just above the treetops like it had come down to look at her. She breathed out slowly. A deer, maybe. The park was full of them. She'd seen the herds on the drive in, their eyes flashing in the headlights. But deer made noise. Deer rustled, snorted, crashed away through the bracken. Whatever had moved had done it in absolute silence, the way only the dead and the patient move. The pendant at her throat grew warm. She'd nearly forgotten she was wearing it — the deep red stone on its silver chain, the one that had arrived at the flat above Silas' bar in a plain envelope with no note, no sender, nothing but her name in a hand she didn't recognize. She wore it because it was beautiful and because some superstitious corner of her had decided it was lucky. Now it sat against her breastbone like a coal newly raked from a fire, pulsing — actually pulsing, she could feel it, a slow throb in time with nothing she knew, certainly not her own galloping heart. She closed her hand around it. The warmth bled up through her fingers. "Okay," she whispered. "Okay. I'm leaving." She turned to go back the way she'd come, and the grove was wrong. She'd entered between two trunks with a forked split in the left one, like a tuning fork. She was certain of it; she made a habit of being certain, of noticing exits, a habit Evan had carved into her without ever meaning to teach her anything useful. The forked trunk was gone. The ring of trees had closed seamlessly around her, a wall of pale pillars in every direction, and beyond them the long grass of Richmond Park had become forest — dense, black, breathing forest that went down and down into a dark no city should be able to hold. Behind her, something laughed. It was a soft sound, almost tender, and it came from very close. She spun. The grove was empty. The flowers glowed. The pendant burned. "Who's there?" Her voice shook now, and she hated it, hated that the old fear came back so easily, that her body remembered being small and cornered. "I know someone's there." A shape detached itself from the deepest shadow between two trunks. It was tall — too tall — and it did not so much walk as resolve, the darkness around it thinning until there was a figure standing where there had been only night. She couldn't make out a face. She didn't think she wanted to. It had the rough outline of a person and the wrongness of something wearing a person the way she wore her jacket. "Aurora," it said, and it said her full name, the one almost no one used, the name her mother gave her in a Cardiff hospital twenty-five years ago. "You came." "Where's Eva?" she managed. The shape tilted what might have been its head. The flowers near its feet curled shut, one by one, as though the dark of it touched them. "Eva," it repeated, and there was something like amusement in it, and something like hunger. "Is that who called you here? How clever of her. How careless of you." The pendant flared so hot she gasped. And in its sudden crimson light she saw, for one heartbeat, the thing's true shape — and she understood, with the cold clean certainty that had carried her out of every locked room of her life, that she was not going to talk her way out of this one. She ran.
created_at"2026-06-01T12:12:24.571Z" 6/1/2026, 12:12:24 PM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2772
moderation_latency(null)
generation_time37820
tokens_prompt812
tokens_completion1647
native_tokens_prompt1170
native_tokens_completion2075
native_tokens_completion_images(null)
native_tokens_reasoning59
native_tokens_cached0
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"end_turn"
service_tier"default"
usage0.057725
router(null)
provider_responses
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endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01UZXYVmL9o5dEoRSaiWJgEN"
is_byokfalse
latency1078
model_permaslug"anthropic/claude-4.8-opus-20260528"
provider_name"Anthropic"
status200
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upstream_id"msg_01UZXYVmL9o5dEoRSaiWJgEN"
total_cost0.057725
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provider_name"Anthropic"
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Evaluation details

Result Evaluator Details Meta Data
57.14% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags7
adverbTagCount1
adverbTags
0"She'd nearly [nearly]"
dialogueSentences12
tagDensity0.583
leniency1
rawRatio0.143
effectiveRatio0.143
82.25% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1127
totalAiIsmAdverbs4
found
0
adverb"really"
count1
1
adverb"perfectly"
count1
2
adverb"slowly"
count1
3
adverb"very"
count1
highlights
0"really"
1"perfectly"
2"slowly"
3"very"
100.00% AI-ism character names
Target: 0 AI-default names (17 tracked, −20% each)
codexExemptions(empty)
found(empty)
100.00% AI-ism location names
Target: 0 AI-default location names (33 tracked, −20% each)
codexExemptions(empty)
found(empty)
68.94% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1127
totalAiIsms7
found
0
word"warmth"
count2
1
word"echo"
count1
2
word"silence"
count1
3
word"could feel"
count1
4
word"throb"
count1
5
word"resolve"
count1
highlights
0"warmth"
1"echo"
2"silence"
3"could feel"
4"throb"
5"resolve"
100.00% Cliché density
Target: ≤1 cliche(s) per 800-word window
totalCliches0
maxInWindow0
found(empty)
highlights(empty)
100.00% Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells0
narrationSentences80
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount2
narrationSentences80
filterMatches(empty)
hedgeMatches
0"seemed to"
1"seem to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences85
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen48
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1137
ratio0
matches(empty)
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions7
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions17
wordCount1074
uniqueNames9
maxNameDensity0.28
worstName"Eva"
maxWindowNameDensity1
worstWindowName"Eva"
discoveredNames
Eva3
Richmond2
Park2
Rory3
London2
October1
June1
Evan2
Cardiff1
persons
0"Eva"
1"Rory"
2"Evan"
places
0"Richmond"
1"Park"
2"London"
3"June"
4"Cardiff"
globalScore1
windowScore1
11.11% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences54
glossingSentenceCount3
matches
0"felt like stepping into a held breath"
1"felt like the breath was about to be le"
2"something like amusement in it, and somethin"
3"something like hunger"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.88
wordCount1137
matches
0"not really — they were oaks, but oaks gone wrong, their trunks twisted into pillars"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences85
matches
0"hated that the"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs30
mean37.9
std30.54
cv0.806
sampleLengths
080
131
270
38
474
511
645
739
889
913
1047
118
1263
1330
147
15102
1613
176
1814
19101
204
2125
2231
2378
2430
254
2627
2729
2856
292
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount1
totalSentences80
matches
0"was gone"
45.86% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount4
totalVerbs173
matches
0"was moving"
1"wasn't touching"
2"was like speaking"
3"was wearing"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount10
semicolonCount2
flaggedSentences11
totalSentences85
ratio0.129
matches
0"They weren't stones, not really — they were oaks, but oaks gone wrong, their trunks twisted into pillars and arranged in a rough ring, bark grey and smooth as old bone in the moonlight."
1"Only the wind moving in the high branches, except — she stopped."
2"She wasn't a scientist; she didn't have to understand it."
3"Not colder — warmer, a soft summer warmth that had no business in a London October, and with it came the smell of flowers."
4"That was the only way she could describe it — the words left her mouth and did not travel, did not echo, did not seem to reach even the nearest tree."
5"She'd nearly forgotten she was wearing it — the deep red stone on its silver chain, the one that had arrived at the flat above Silas' bar in a plain envelope with no note, no sender, nothing but her name in a hand she didn't recognize."
6"Now it sat against her breastbone like a coal newly raked from a fire, pulsing — actually pulsing, she could feel it, a slow throb in time with nothing she knew, certainly not her own galloping heart."
7"She was certain of it; she made a habit of being certain, of noticing exits, a habit Evan had carved into her without ever meaning to teach her anything useful."
8"The ring of trees had closed seamlessly around her, a wall of pale pillars in every direction, and beyond them the long grass of Richmond Park had become forest — dense, black, breathing forest that went down and down into a dark no city should be able to hold."
9"It was tall — too tall — and it did not so much walk as resolve, the darkness around it thinning until there was a figure standing where there had been only night."
10"And in its sudden crimson light she saw, for one heartbeat, the thing's true shape — and she understood, with the cold clean certainty that had carried her out of every locked room of her life, that she was not going to talk her way out of this one."
85.11% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount638
adjectiveStacks1
stackExamples
0"long shut behind her,"
adverbCount32
adverbRatio0.050156739811912224
lyAdverbCount12
lyAdverbRatio0.018808777429467086
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences85
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences85
mean13.38
std11.95
cv0.893
sampleLengths
011
11
236
332
45
52
624
71
87
91
1021
1140
128
1334
147
1519
1614
1711
182
1912
2013
2118
2210
232
245
2510
2612
274
2824
2921
3018
315
3217
336
347
355
3631
3711
388
393
401
4132
424
433
446
4514
464
478
4818
497
54.51% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats12
diversityRatio0.4117647058823529
totalSentences85
uniqueOpeners35
98.04% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount2
totalSentences68
matches
0"Only the wind moving in"
1"Only the ring of pale"
ratio0.029
49.41% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount29
totalSentences68
matches
0"She'd asked one, at least."
1"They never said his name"
2"She pulled her jacket closer"
3"She found the standing stones"
4"They weren't stones, not really"
5"She'd been here once before,"
6"Her voice came out smaller"
7"She wasn't a scientist; she"
8"She stepped between two of"
9"She looked down and saw"
10"It should have been beautiful."
11"It was like speaking into"
12"She turned fast."
13"She breathed out slowly."
14"She'd seen the herds on"
15"She'd nearly forgotten she was"
16"She wore it because it"
17"She closed her hand around"
18"She turned to go back"
19"She'd entered between two trunks"
ratio0.426
48.24% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount56
totalSentences68
matches
0"The text Eva had sent"
1"Rory had read it a"
2"She'd asked one, at least."
3"They never said his name"
4"She pulled her jacket closer"
5"She found the standing stones"
6"They weren't stones, not really"
7"She'd been here once before,"
8"Her voice came out smaller"
9"The wind was moving in"
10"The leaves above her hissed"
11"Rory told herself there were"
12"The lay of the land."
13"She wasn't a scientist; she"
14"She stepped between two of"
15"The temperature changed first."
16"She looked down and saw"
17"Foxglove and meadowsweet and others"
18"It should have been beautiful."
19"Some animal part of her"
ratio0.824
100.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount4
totalSentences68
matches
0"Now, standing at the edge"
1"Even now the syllable made"
2"Now, at midnight, it felt"
3"Now it sat against her"
ratio0.059
83.33% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences36
technicalSentenceCount3
matches
0"She pulled her jacket closer and stepped past the last of the maintained lawn into the older part of the park, where the grass grew long and the oaks stood like…"
1"She looked down and saw them: wildflowers, hundreds of them, blooming in the dark as though it were noon in June."
2"And in its sudden crimson light she saw, for one heartbeat, the thing's true shape — and she understood, with the cold clean certainty that had carried her out …"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags7
uselessAdditionCount0
matches(empty)
0.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags3
fancyCount2
fancyTags
0"she whispered (whisper)"
1"it repeated (repeat)"
dialogueSentences12
tagDensity0.25
leniency0.5
rawRatio0.667
effectiveRatio0.333
79.4651%