Run: 2026-09-23-01M37PPKA8APAC0CQ4307D4GMW

Run Details

Duration:
51.9s
Cost:
$0.078528
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
The wall along Sawyer's Hill was lower than Rory remembered, or she was more desperate than she'd been in daylight. She swung her leg over the cold brick, dropped into wet grass, and crouched there a moment with her heart going too fast, waiting for a torch beam or a shout from the gatehouse. Nothing. Richmond Park after closing was a different country. The city had been switched off behind her. No traffic hum, no sirens, only the enormous dark of open ground and the smell of bracken rotting down into the soil. She pulled her jacket tighter and started walking. The pendant sat against her sternum under three layers of clothing, and she could feel it. That was the problem. That was why she was here at half eleven on a Tuesday instead of asleep in the flat above Silas' bar with the jukebox thumping up through the floorboards. For three nights the Heartstone had been warm. Not a warmth you could argue away as body heat, but a steady, deliberate pulse, like a second pulse, like something small breathing in its sleep. Tonight, halfway through a delivery run for the Golden Empress with a bag of Yu-Fei's char siu bao cooling on the back of the bike, it had flared so hot she'd nearly dropped the bag in the road. Warm meant close. Close meant a door. She didn't know what else to do with that except go to the one place she knew where doors were supposed to be. The deer should have been out. She'd seen them on night walks before, the herds folded down in the grass like grey stones, heads lifting to watch her pass. Tonight the grass was empty in every direction. She told herself they'd moved to the Isabella Plantation, that deer went wherever deer went. She kept walking. It took her twenty minutes to find the oaks. They always seemed to shift a little, never quite where her memory placed them, and when they finally rose out of the dark she felt the familiar lurch in her stomach, the sense of a step missing on a staircase. The standing stones weren't stone at all but old oak, silver-grey and furrowed, taller than a man, set in a ring so exact no one could have planted it by accident. Between them, the clearing glowed faintly with flowers. She stopped at the boundary. In daylight the Grove was absurdly lovely. Foxgloves, cornflowers, poppies, meadowsweet, all blooming together in defiance of the season. Isolde had once laughed at her for asking how. *Time is a suggestion here, little mortal. The flowers simply decline to take it.* The flowers were still blooming. That wasn't what stopped her. Every one of them was closed. Not wilted. Closed, the way daisies closed at dusk, each bloom drawn tight into itself like a fist. Hundreds of them. Thousands. The whole clearing clenched shut, and when the breeze moved through it the stems didn't sway. They held perfectly still while the grass around the oaks bent and hissed. "Isolde?" Her voice came out smaller than she wanted. She cleared her throat. "Isolde. It's Rory." Nothing answered. She hadn't really expected anything to. The fae came when they chose. She stepped between the two nearest oaks. The air changed at once. It always did, a pressure behind the ears, the sense of passing through the skin of a soap bubble. But tonight it was thicker, and warmer, and the smell of the park vanished entirely. Here the air smelled of cut stems. Of sap. And under the sap, faint, something like a struck match. The Heartstone throbbed against her chest, once, hard enough that she put her hand over it. She walked toward the centre of the clearing, careful where she stepped, and that was when she heard the birds. A blackbird, first, somewhere in the oaks. The full, liquid dawn song, bright and busy and entirely wrong at midnight. Then a robin joined it. Then a wren, that ridiculous loud trill. Within seconds the clearing was ringing with a dawn chorus, dozens of birds singing their hearts out in the pitch dark, and Rory stood with her boots sunk in closed flowers and turned slowly in a circle and could not see a single one. She looked up. The branches of the oaks were bare black lines against a sky with no moon. No shapes moved in them. The singing stopped. All at once, mid-phrase, like a needle lifted off a record. In the silence she could hear her own breath. She could hear the blood in her ears. She made herself count, the way she'd learned to in the long months with Evan when the only thing she could control was the inside of her own head. *One. Two. Three.* Cool. Logical. Something was playing with her, and things that played with you wanted a reaction. She took out her phone. The screen lit her hand blue-white. 23:52. One bar of signal, flickering. She watched it and the minutes didn't move, and after a while she realised the seconds weren't moving either. The little colon between hours and minutes, which should have been blinking, simply sat there. She put the phone away. When she looked up there was something standing beside the far oak. Or there wasn't. Her eyes went straight to it and there was only the tree, grey and furrowed and ordinary. But she had seen, in the corner of her vision as she lifted her head, a second shape close against the trunk. Narrower. Paler. The height of a person. "Hello?" she said. The flowers at her feet rustled. She looked down. They were still closed. They were still perfectly still. But the rustling went on, a dry, papery whisper moving outward from her boots in a slow ring, as if something small were walking through the stems all around her, circling. Rory didn't move. She kept her eyes on the far oak and let the sound go around her once, twice, and on the third time it stopped directly behind her. She didn't turn around. She wanted to more than she had ever wanted anything. Every nerve in her back was lit up, the skin between her shoulder blades crawling as if a breath were resting on it. But some old instinct older than law school and London and Cardiff told her with total certainty that if she turned, whatever was there would be very glad she had. She began, instead, to count the oaks. She'd done it before, on a bored afternoon while Isolde spoke to the wildflowers in a language that made her teeth ache. Nine. Nine oaks in the ring. She'd remarked on it and Isolde had smiled the way she smiled when a human had noticed something they weren't meant to. Rory counted them now, turning only her eyes. One, two, three by the path she'd come in. Four and five on the eastern side. Six. Seven. Eight, the far oak, the one with the shape she hadn't seen. Nine. Ten. She counted again. Her lips moved. Ten. The tenth stood between the fourth and the fifth, where there had always been a gap wide enough to walk through. It was the same silver-grey as the others. The same deep furrows. But it was thinner, and it stood not quite straight, and when she let her eyes rest on it she had the impression, which she could never afterwards explain, that it was leaning forward very slightly. Toward her. The way a person leans in to hear better. The Heartstone was burning now. Not warm. Burning, a coin left on a radiator, and she could feel the heat of it spreading through her collarbones and up the side of her throat, and in the dark she could see the faint crimson glow of it leaking through the weave of her jumper. The tenth oak was closer. She hadn't seen it move. She would have sworn on anything she hadn't looked away. But the gap it had filled was open again, between four and five, and the thin grey shape stood a little inside the ring now, among the flowers, and the flowers nearest to it had begun, one by one, to open. They opened toward her. Behind her, very close to her left ear, something breathed out. It smelled of struck matches. Rory ran. She didn't decide to. Her body simply went, straight ahead, toward the path, through the gap between oak two and oak three, boots tearing through the stems. She felt the soap-bubble pressure of the boundary and then she was through it and the cold air of the real park hit her face like water and the grass was bending in the wind and somewhere far off a car horn sounded on the Upper Richmond Road, the sweetest noise she had ever heard. She didn't stop until she reached the wall. She put her back against the brick and slid down it, gasping, and pulled the pendant out of her collar with shaking fingers. It was cool. Entirely cool. The faint inner glow had dimmed to almost nothing. She took out her phone. 23:53. One minute. She had been in there one minute. Rory sat with her knees pulled up and the crescent-shaped scar on her wrist pressed against her mouth, an old habit from childhood, and made herself breathe until her heart slowed. Only much later, back in the flat, lying awake while the jukebox downstairs played something slow, did she let herself remember the last thing. The thing she had heard in the moment before she ran, whispered warm against her ear in a voice that was almost kind. Not *Rory*. Not *Aurora*. A name she had never heard before in her life. And how, when it was spoken, the Heartstone had pulsed once against her chest, like something answering.
created_at"2026-09-23T17:58:31Z" 9/23/2026, 5:58:31 PM
model"anthropic/claude-opus-5.5-20260921"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency34470
moderation_latency(null)
generation_time51884
tokens_prompt792
tokens_completion2522
native_tokens_prompt1172
native_tokens_completion3692
native_tokens_completion_images(null)
native_tokens_reasoning647
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"
usage0.078528
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790186311-BevrqWhDVeVth41EE8NH"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790186311-RP7oyh8KYpMUegvhEALj"
upstream_id"msg_011CfLoewifG6Gvk9JfaJkpb"
provider_responses
0
endpoint_id"3a2388bc-3740-4e64-a1f5-4e301726b6b9"
id"msg_011CfLoewifG6Gvk9JfaJkpb"
is_byokfalse
latency1352
model_permaslug"anthropic/claude-opus-5.5-20260921"
provider_name"Claude Platform on AWS"
status200
total_cost0.078528
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
100.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags2
adverbTagCount0
adverbTags(empty)
dialogueSentences3
tagDensity0.667
leniency1
rawRatio0
effectiveRatio0
75.83% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1655
totalAiIsmAdverbs8
found
0
adverb"perfectly"
count2
1
adverb"really"
count1
2
adverb"slowly"
count1
3
adverb"very"
count3
4
adverb"slightly"
count1
highlights
0"perfectly"
1"really"
2"slowly"
3"very"
4"slightly"
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)
48.64% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1655
totalAiIsms17
found
0
word"could feel"
count2
1
word"warmth"
count1
2
word"pulse"
count2
3
word"familiar"
count1
4
word"lurch"
count1
5
word"stomach"
count1
6
word"sense of"
count2
7
word"furrowed"
count2
8
word"throbbed"
count1
9
word"silence"
count1
10
word"whisper"
count1
11
word"the last thing"
count1
12
word"pulsed"
count1
highlights
0"could feel"
1"warmth"
2"pulse"
3"familiar"
4"lurch"
5"stomach"
6"sense of"
7"furrowed"
8"throbbed"
9"silence"
10"whisper"
11"the last thing"
12"pulsed"
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
narrationSentences150
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount1
narrationSentences150
filterMatches(empty)
hedgeMatches
0"seemed to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences151
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen56
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans4
markdownWords19
totalWords1655
ratio0.011
matches
0"Time is a suggestion here, little mortal. The flowers simply decline to take it."
1"One. Two. Three."
2"Rory"
3"Aurora"
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions4
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions39
wordCount1640
uniqueNames22
maxNameDensity0.43
worstName"Rory"
maxWindowNameDensity1.5
worstWindowName"Nine"
discoveredNames
Sawyer1
Hill1
Rory7
Park1
Tuesday1
Heartstone4
Golden1
Empress1
Yu-Fei1
Isabella1
Plantation1
Grove1
Evan1
Cool1
London1
Cardiff1
Isolde3
Upper1
Richmond2
Road1
One4
Nine3
persons
0"Sawyer"
1"Rory"
2"Heartstone"
3"Yu-Fei"
4"Evan"
5"Isolde"
places
0"Park"
1"Isabella"
2"Plantation"
3"London"
4"Cardiff"
5"Upper"
6"Richmond"
7"Road"
8"One"
globalScore1
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences87
glossingSentenceCount1
matches
0"something like a struck match"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.604
wordCount1655
matches
0"Not a warmth you could argue away as body heat, but a steady, deliberate pulse, like a second pulse, like someth"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences151
matches
0"explain, that it"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs56
mean29.55
std27.33
cv0.925
sampleLengths
054
139
28
3121
430
555
688
75
842
910
106
1151
1216
1314
147
1558
1616
1720
1876
1923
203
2111
2265
2351
245
2512
2649
273
286
2943
3030
314
3263
337
3450
3538
361
371
387
3980
4053
415
4256
434
4416
452
4682
4731
4814
496
95.91% Passive voice overuse
Target: ≤2% passive sentences
passiveCount4
totalSentences150
matches
0"been switched"
1"were supposed"
2"was lit"
3"was spoken"
19.12% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount7
totalVerbs258
matches
0"were still blooming"
1"was ringing"
2"was playing"
3"were walking"
4"were resting"
5"was burning"
6"was bending"
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount0
semicolonCount0
flaggedSentences0
totalSentences151
ratio0
matches(empty)
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount141
adjectiveStacks0
stackExamples(empty)
adverbCount5
adverbRatio0.03546099290780142
lyAdverbCount1
lyAdverbRatio0.0070921985815602835
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences151
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences151
mean10.96
std10.73
cv0.979
sampleLengths
020
134
21
38
48
522
68
716
84
929
108
1126
1238
133
144
1523
166
1723
188
1915
203
219
2240
2331
248
255
267
2712
289
297
307
315
325
336
342
3516
363
371
3816
3913
409
414
423
432
446
456
467
475
4819
4915
49.22% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats15
diversityRatio0.35570469798657717
totalSentences149
uniqueOpeners53
81.30% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount3
totalSentences123
matches
0"Then a robin joined it."
1"Then a wren, that ridiculous"
2"Only much later, back in"
ratio0.024
67.15% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount47
totalSentences123
matches
0"She swung her leg over"
1"She pulled her jacket tighter"
2"She didn't know what else"
3"She'd seen them on night"
4"She told herself they'd moved"
5"She kept walking."
6"It took her twenty minutes"
7"They always seemed to shift"
8"She stopped at the boundary."
9"They held perfectly still while"
10"Her voice came out smaller"
11"She cleared her throat."
12"She hadn't really expected anything"
13"She stepped between the two"
14"It always did, a pressure"
15"She walked toward the centre"
16"She looked up."
17"She could hear the blood"
18"She made herself count, the"
19"She took out her phone."
ratio0.382
90.08% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount91
totalSentences123
matches
0"The wall along Sawyer's Hill"
1"She swung her leg over"
2"Richmond Park after closing was"
3"The city had been switched"
4"She pulled her jacket tighter"
5"The pendant sat against her"
6"That was the problem."
7"That was why she was"
8"Tonight, halfway through a delivery"
9"She didn't know what else"
10"The deer should have been"
11"She'd seen them on night"
12"Tonight the grass was empty"
13"She told herself they'd moved"
14"She kept walking."
15"It took her twenty minutes"
16"They always seemed to shift"
17"The standing stones weren't stone"
18"She stopped at the boundary."
19"Foxgloves, cornflowers, poppies, meadowsweet, all"
ratio0.74
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences123
matches(empty)
ratio0
88.95% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences53
technicalSentenceCount4
matches
0"But the rustling went on, a dry, papery whisper moving outward from her boots in a slow ring, as if something small were walking through the stems all around he…"
1"Every nerve in her back was lit up, the skin between her shoulder blades crawling as if a breath were resting on it."
2"She'd done it before, on a bored afternoon while Isolde spoke to the wildflowers in a language that made her teeth ache."
3"The thing she had heard in the moment before she ran, whispered warm against her ear in a voice that was almost kind."
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags2
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags1
fancyCount0
fancyTags(empty)
dialogueSentences3
tagDensity0.333
leniency0.667
rawRatio0
effectiveRatio0
87.2067%