Run: 2026-09-29-01M3P2C96KDKK5T2C7W1ZRSEKG

Run Details

Duration:
21.2s
Cost:
$0.022574
Provider:
Claude Platform on AWS

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
Rory left the last bus stop behind her at ten past eleven and did not look back at it, because if she looked back she would see how small its light had become, and she might decide to go home. The park gates were open. That was the first wrong thing. Richmond Park closed at dusk in winter, and the gates were always chained, but tonight one stood ajar, its iron bars beaded with cold. She slipped through the gap and the tarmac gave way to gravel, then to wet grass that soaked through her trainers within a dozen steps. The note had been simple. It had been tucked into the bag of her last delivery, under a receipt from the Golden Empress, in handwriting she didn't know. *The oaks at the edge of the deer field. Come alone. Bring the stone.* No name. She had turned the paper over three times looking for one. The pendant lay against her breastbone now, under her jumper. She had put it on out of stubbornness more than belief. The silver chain had warmed against her skin on the walk, which meant nothing. Bodies warmed things. She pressed her thumb against her left wrist, over the small crescent scar, a habit from when she was small and something frightened her. Then she made herself stop. "Right," she said aloud. Her voice sounded thin in the dark. "Oaks. Deer field. Have a look, go home." The deer field was a pale expanse under a moon half-swallowed by cloud. She had expected deer. Richmond was full of them, dark shapes standing in the mist and chewing, indifferent. Tonight the field was empty. No hoofprints marked the frost, no dung, nothing. The grass lay flat and silver and undisturbed, as if no living thing had crossed it in years. She walked along its edge, keeping to the tree line. Somewhere behind her, a twig snapped. Rory stopped. She counted five slow breaths before she turned, and there was nothing there but trunks and the black spaces between them. Foxes, she told herself. Deer after all, somewhere out of sight. She started walking again, a little faster. The snapping came again. It was not quite behind her now. It was to her left, in the trees, and it kept pace with her. When she slowed, it slowed. When she stopped, there was a small, attentive silence, the kind that comes when someone holds their breath. "I can hear you," she said. Nothing answered. But the quiet changed. It did not feel like the absence of sound so much as a pressure, like standing in a lift as the doors close. She made herself keep walking. The oaks appeared out of the mist sooner than she'd expected. There were seven of them, or perhaps eight, standing in a rough ring, enormous and black and older than the park, older than the walls around it. Their trunks were furred with moss, and between two of them the air looked faintly wrong, the way a road shimmers in August. Her breath, which had been clouding in front of her all the way from the gate, stopped clouding. Against her chest, the pendant pulsed. It was not a strong sensation. A soft, slow warmth, like a hand laid flat over her sternum, and then gone, and then back. She drew it out from under her jumper. The crimson stone had a faint inner glow, a dull coal light that she was certain had not been there at the bus stop. It brightened as she stepped toward the gap between the oaks, and dimmed when she stepped back. "Okay," she whispered. "That's not nothing." She should have gone home then. Later she would know that, in the cold, unhurried way you know things about a room after you've left it. But the note had said *Bring the stone*, and somebody knew she had it, and that was a question she couldn't leave unasked. She stepped between the oaks. The change was gentle, and that was what frightened her. There was no lurch, no rush of wind. The mist simply thinned, and the cold let go of her skin, and she stood in a clearing under a sky far clearer than the one she'd left. Wildflowers grew around her ankles, pale and luminous, foxglove and something like bluebell, though it was January. They swayed, though there was no breeze. The Grove was beautiful. She thought that first, and distrusted it at once. "Hello?" she said. The flowers went still. Every one of them, all together, as though at a signal. Her phone was in her back pocket. She pulled it out and the screen lit her face: 11:42. She had checked it at the gate and it had said 11:20. Twenty-two minutes, and she had walked for what felt like forty. She watched the display a moment longer. The minutes did not tick over. Then, all at once, they jumped, 11:51, 12:06, 12:30, the numbers stumbling forward like a drunk, and she put it away with fingers that no longer felt entirely hers. *An hour inside can be minutes or days outside.* Where had she heard that? Eva, maybe, half-joking, over wine. It hadn't sounded like a warning then. At the edge of her vision, something moved. She didn't turn her head. She had learned that from somewhere, that the thing you look at directly goes still. She let her eyes slide sideways instead. A shape stood at the far side of the clearing, tall and narrow, no wider than a sapling, and she was almost sure it was a sapling until it was not where it had been. It had shifted a few feet to the left. There had been no sound, and the flowers had not bent. She looked at it properly, and it was a sapling. "Not funny," Rory said, and her voice cracked on the second word. Behind her, softly, close enough to stir the hair on her neck, something exhaled. She did not scream. She stood absolutely still while the pendant burned against her palm, hot now, almost painful, and the wildflowers around her began, one by one, to turn their faces toward her. Somewhere in the trees, a voice that was very nearly her own began to hum the tune her mother used to sing in the kitchen in Cardiff. The oaks were ten steps behind her. Ten steps, and a cold January field, and a gate that would be chained by morning. She counted her breaths again. One. Two. On the third, the humming stopped, and the voice said, kindly, "There you are, Laila." Nobody had called her that in years.
created_at"2026-09-29T07:51:57.912Z" 9/29/2026, 7:51:57 AM
model"anthropic/claude-sonnet-5.5-20260928"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency21225
moderation_latency(null)
generation_time21225
tokens_prompt792
tokens_completion1539
native_tokens_prompt1172
native_tokens_completion2023
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)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"end_turn"
service_tier"default"
usage0.022574
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790668317-8Fsj9docjuWluxYNYHfg"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790668317-lutgx9w7dcUROOC4LhQX"
upstream_id"msg_011CfXNFk1havW8y87BqpqDh"
provider_responses
0
endpoint_id"99aaad94-923b-4fc1-b763-271ed5486f7a"
id"msg_011CfXNFk1havW8y87BqpqDh"
is_byokfalse
latency636
model_permaslug"anthropic/claude-sonnet-5.5-20260928"
provider_name"Claude Platform on AWS"
status200
total_cost0.022574
cache_discount(null)
upstream_inference_cost0
provider_name"Claude Platform on AWS"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

Evaluation details

Result Evaluator Details Meta Data
33.33% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags6
adverbTagCount1
adverbTags
0"she said aloud [aloud]"
dialogueSentences8
tagDensity0.75
leniency1
rawRatio0.167
effectiveRatio0.167
91.03% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1115
totalAiIsmAdverbs2
found
0
adverb"softly"
count1
1
adverb"very"
count1
highlights
0"softly"
1"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)
77.58% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1115
totalAiIsms5
found
0
word"silence"
count1
1
word"pulsed"
count1
2
word"warmth"
count1
3
word"lurch"
count1
4
word"absolutely"
count1
highlights
0"silence"
1"pulsed"
2"warmth"
3"lurch"
4"absolutely"
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
narrationSentences97
matches(empty)
98.67% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount2
hedgeCount1
narrationSentences97
filterMatches
0"know"
1"look"
hedgeMatches
0"began to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences99
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen40
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans3
markdownWords26
totalWords1115
ratio0.023
matches
0"The oaks at the edge of the deer field. Come alone. Bring the stone."
1"Bring the stone"
2"An hour inside can be minutes or days outside."
93.75% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions8
unquotedAttributions1
matches
0"Foxes, she told herself."
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions11
wordCount1091
uniqueNames8
maxNameDensity0.27
worstName"Rory"
maxWindowNameDensity0.5
worstWindowName"January"
discoveredNames
Park1
Golden1
Empress1
August1
January2
Grove1
Cardiff1
Rory3
persons
0"Rory"
places
0"Park"
1"Golden"
2"August"
3"January"
4"Cardiff"
globalScore1
windowScore1
41.30% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences69
glossingSentenceCount3
matches
0"something like bluebell, though it was Janua"
1"felt like forty"
2"sounded like a warning then"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1115
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences99
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs34
mean32.79
std26.7
cv0.814
sampleLengths
040
160
255
367
419
562
616
741
848
96
1029
115
1279
136
1473
156
1649
175
1870
1913
203
2115
2283
2326
248
2582
2610
2712
2814
2961
3023
317
3215
337
98.03% Passive voice overuse
Target: ≤2% passive sentences
passiveCount2
totalSentences97
matches
0"been tucked"
1"were furred"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount0
totalVerbs177
matches(empty)
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount0
semicolonCount0
flaggedSentences0
totalSentences99
ratio0
matches(empty)
96.61% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1094
adjectiveStacks0
stackExamples(empty)
adverbCount48
adverbRatio0.043875685557586835
lyAdverbCount9
lyAdverbRatio0.008226691042047532
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences99
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences99
mean11.26
std8.18
cv0.727
sampleLengths
040
15
26
324
425
55
623
79
82
95
1011
1110
1211
1314
143
1524
165
174
187
198
2013
214
2214
235
248
2518
2610
276
282
2921
304
317
327
334
347
3514
365
3718
386
392
404
4123
425
4311
4427
4523
4618
476
486
4918
66.33% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats6
diversityRatio0.43434343434343436
totalSentences99
uniqueOpeners43
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount4
totalSentences89
matches
0"Then she made herself stop."
1"Somewhere behind her, a twig"
2"Then, all at once, they"
3"Somewhere in the trees, a"
ratio0.045
53.71% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount37
totalSentences89
matches
0"She slipped through the gap"
1"It had been tucked into"
2"She had turned the paper"
3"She had put it on"
4"She pressed her thumb against"
5"she said aloud"
6"Her voice sounded thin in"
7"She had expected deer."
8"She walked along its edge,"
9"She counted five slow breaths"
10"She started walking again, a"
11"It was not quite behind"
12"It was to her left,"
13"It did not feel like"
14"She made herself keep walking."
15"Their trunks were furred with"
16"Her breath, which had been"
17"It was not a strong"
18"She drew it out from"
19"It brightened as she stepped"
ratio0.416
66.74% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount70
totalSentences89
matches
0"Rory left the last bus"
1"The park gates were open."
2"That was the first wrong"
3"Richmond Park closed at dusk"
4"She slipped through the gap"
5"The note had been simple."
6"It had been tucked into"
7"*The oaks at the edge"
8"She had turned the paper"
9"The pendant lay against her"
10"She had put it on"
11"The silver chain had warmed"
12"Bodies warmed things."
13"She pressed her thumb against"
14"she said aloud"
15"Her voice sounded thin in"
16"The deer field was a"
17"She had expected deer."
18"Richmond was full of them,"
19"Tonight the field was empty."
ratio0.787
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences89
matches(empty)
ratio0
100.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences43
technicalSentenceCount2
matches
0"The grass lay flat and silver and undisturbed, as if no living thing had crossed it in years."
1"Her breath, which had been clouding in front of her all the way from the gate, stopped clouding."
41.67% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags6
uselessAdditionCount1
matches
0"the voice said, kindly,"
66.67% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags6
fancyCount1
fancyTags
0"she whispered (whisper)"
dialogueSentences8
tagDensity0.75
leniency1
rawRatio0.167
effectiveRatio0.167
84.1807%