Run: 2026-09-29-01M3P2APZ7KESB5F7GR2YHB5XV

Run Details

Duration:
33.0s
Cost:
$0.033444
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 order had come through at 10:52, which was late even for a Friday. Yu-Fei had held the ticket up between two fingers like something the cat had brought in. "Richmond Park," she'd said. "Pen Ponds car park, then follow the path to the oaks. Paid in advance. Forty pounds tip." "The park's shut at night." "Not my problem. Forty pounds is not my problem either. It is your problem, Rory." So Rory had cycled out along the river with the insulated bag strapped to her back, the smell of black pepper beef and egg fried rice rising warm through the canvas. The pedestrian gate at Petersham had been unlocked. She'd noted that and decided not to care. Now the gravel had given way to a deer track, and the track had given way to grass gone silver with frost, and her bike lay somewhere behind her against a fence post she could no longer see. She checked the slip again under her phone's torch. *Deliver to the stones. Name: Laila.* Nobody in London called her Laila. She had used it once, on a lease application, in the worst month of her life, and never again. She had decided that was a coincidence. Coincidences were cheap. She was a person who paid her rent with them. The rut was on. All week she'd heard the stags bellowing across the park, a sound like furniture being dragged through a cathedral. Tonight there was nothing. She noticed the absence only when she was well inside it, the way you notice a fridge has stopped humming. "Right," she said, quietly. Her voice went out and did not come back. The oaks rose ahead, black against a sky that was somehow too clear for London. Five, six, seven of them, huge and squat, arranged in a ring far too regular to be an accident. Not trees, she saw as she got closer. Stones. Oak-dark and grained like wood, but stone all the same, each one leaning a little inward as though listening. The pendant was warm. She hadn't put a hand to it, but she felt it against her breastbone, a small steady heat through her jumper, as if someone had pressed a thumb there. Rory pulled the silver chain out and looked at the crimson stone. A faint light turned slowly in it, like a coal being breathed on. "Not now," she told it. It pulsed once, and she felt it in her teeth. She stepped between two of the stones, and the air changed. It didn't grow warmer, exactly. It grew *softer*, as if she'd walked through a curtain of breath. The frost stopped at her feet. Ahead, the grass ran on green and thick, and it was full of flowers. Foxgloves, cornflowers, something pale and star-shaped she didn't know. In November. They stood perfectly still, though a wind was moving her hair. She stood a moment, letting her eyes adjust, and then she smelled it. Under the sweetness of the blooms lay something else, faint, like fruit left too long in a warm room. "Delivery," she called. "Golden Empress. Hello?" Nothing. She waited the polite length of time, then a rude one. Then she crouched, unzipped the bag, and set the bag of food on the flat top of the nearest low stone. Job done. Forty quid. She could be back on the bike in ten minutes. She didn't move. Her phone said 11:31. She'd checked it when she stepped through. She was nearly sure it had said 11:31 then. Somewhere behind her, a twig broke. Rory turned slowly. The ring of stones stood where they'd stood, the gap she'd come through a slot of darker dark. Nothing in it. She let out a breath and turned back. Something had moved. Not something she saw. Something her eyes had *just* missed, a change in the flowers at the far side of the clearing, a place where the foxgloves now leaned the wrong way. She looked straight at it and they were upright, innocent, still. "Okay," she said. "I'm going." She started for the gap, and she heard the footsteps. They were behind her, and they were good footsteps, soft and measured, the pace of someone strolling. She stopped. They stopped, half a beat late. She took three steps. Three more came after, and they were not quite in time with hers, as if whoever made them was learning her stride. She did not look round. She had grown up with a father who cross-examined for a living, and she knew the value of not giving a witness what he wanted. She kept her face still and her breathing slow, and she counted the stones ahead. Four. Five. The gap was between the fifth and sixth. Forty paces. Thirty. The humming began then. It was very quiet, a tune without a tune in it, just a few notes wandering up and down. It seemed to come from her left, then her right, then from just behind her ear, so close she felt the warmth of it on her neck. Her scar itched, the little crescent on her wrist, the old childhood one. She pressed her thumb to it hard. She walked. The gap did not get closer. She stopped and looked down. Her shadow lay long across the grass, pointing away from her. But there was no moon behind her. There was no light behind her at all, and the shadow was thrown *toward* the stones, as if something stood at her back and held a lamp. Except that there were two shadows. Hers, and beside it another, a little taller, its head tilted to one side. Rory closed her eyes. *Think,* she told herself. *Don't run. Running is what it wants.* She did not know why she thought that, only that it sat in her like a fact. She thought of the stag that had gone quiet, and the tip, and the name on the slip. Someone had known that name. Someone had wanted her here and had been sure she'd come. "I've left the food," she said, and her voice was steady, which surprised her. "It's paid for. Whatever this is, we're square." The humming stopped. The silence was worse. She could hear the flowers now, a faint dry whisper as though every petal were turning toward her. "Laila," said a voice, kindly, from very near. It wasn't a whisper. It sounded like her own voice, pitched lower, a little wet at the edges, the way a recording sounds when you hear it played back. The pendant flared against her chest, hot enough to sting. She opened her eyes. The gap in the stones was ten feet away. She could see the frost beyond it, white and honest, and the black sprawl of the park. She could see, on the low stone behind her where she'd left it, the takeaway bag, and it was open. The lid of the container had been folded back neatly. The food had not been touched. Every grain of rice stood in its place. But the steam still rose from it, and the steam was moving toward something she couldn't see, drawn in like smoke into a lung. Rory ran. She did not decide to. Her body went, and the flowers whipped at her knees, and the footsteps behind her broke into a run at last, light and quick and delighted. She threw herself through the gap between the stones and the cold hit her like a slap. Frost crunched under her boots. The stags were bellowing, all of them, wild and near. She didn't stop until she found the fence, and the bike, and the gate. Only there, with her hands shaking on the handlebars, did she look at her phone. 11:31. She watched the number until it changed to 11:32. Then it kept changing, too fast, the minutes tumbling over one another, and she understood that they were not counting forward but catching up. Behind her, back among the oaks, someone began to hum again.
created_at"2026-09-29T07:51:06.476Z" 9/29/2026, 7:51:06 AM
model"anthropic/claude-sonnet-5.5-20260928"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency22768
moderation_latency(null)
generation_time33004
tokens_prompt792
tokens_completion2166
native_tokens_prompt1172
native_tokens_completion3110
native_tokens_completion_images(null)
native_tokens_reasoning682
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"
usage0.033444
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790668266-cCdSry32kQnFGwqyI7qp"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790668266-BMYfFLjMXBeF28CYN1QL"
upstream_id"msg_011CfXNBxUgRm1RQqxedDdoy"
provider_responses
0
endpoint_id"99aaad94-923b-4fc1-b763-271ed5486f7a"
id"msg_011CfXNBxUgRm1RQqxedDdoy"
is_byokfalse
latency886
model_permaslug"anthropic/claude-sonnet-5.5-20260928"
provider_name"Claude Platform on AWS"
status200
total_cost0.033444
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
totalTags7
adverbTagCount0
adverbTags(empty)
dialogueSentences13
tagDensity0.538
leniency1
rawRatio0
effectiveRatio0
81.37% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1342
totalAiIsmAdverbs5
found
0
adverb"slowly"
count2
1
adverb"perfectly"
count1
2
adverb"very"
count2
highlights
0"slowly"
1"perfectly"
2"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)
66.47% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1342
totalAiIsms9
found
0
word"pulsed"
count1
1
word"footsteps"
count3
2
word"measured"
count1
3
word"warmth"
count1
4
word"silence"
count1
5
word"whisper"
count2
highlights
0"pulsed"
1"footsteps"
2"measured"
3"warmth"
4"silence"
5"whisper"
100.00% Cliché density
Target: ≤1 cliche(s) per 800-word window
totalCliches1
maxInWindow1
found
0
label"let out a breath"
count1
highlights
0"let out a breath"
100.00% Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells0
narrationSentences125
matches(empty)
85.71% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount3
hedgeCount2
narrationSentences125
filterMatches
0"notice"
1"hear"
2"look"
hedgeMatches
0"seemed to"
1"began to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences131
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen38
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans6
markdownWords17
totalWords1342
ratio0.013
matches
0"Deliver to the stones. Name: Laila."
1"softer"
2"just"
3"toward"
4"Think,"
5"Don't run. Running is what it wants."
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions10
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions12
wordCount1280
uniqueNames6
maxNameDensity0.39
worstName"Rory"
maxWindowNameDensity1
worstWindowName"London"
discoveredNames
Friday1
Rory5
Petersham1
London2
Laila2
November1
persons
0"Rory"
1"Laila"
places
0"London"
1"November"
globalScore1
windowScore1
56.25% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences80
glossingSentenceCount3
matches
0"as though listening"
1"not quite in time with hers, as if whoever made them was learning her stride"
2"sounded like her own voice, pitched lower"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.745
wordCount1342
matches
0"not counting forward but catching up"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount2
totalSentences131
matches
0"known that name"
1"understood that they"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs48
mean27.96
std22.93
cv0.82
sampleLengths
030
121
25
315
447
538
615
745
847
913
1062
114
1254
135
1410
1570
1632
176
1847
193
2020
216
2232
2346
245
2510
2651
2758
284
2966
308
3150
3220
334
3462
3522
363
3722
388
3929
4014
4194
422
4363
4429
451
4633
4711
88.42% Passive voice overuse
Target: ≤2% passive sentences
passiveCount6
totalSentences125
matches
0"been unlocked"
1"being dragged"
2"being breathed"
3"was thrown"
4"been folded"
5"been touched"
47.79% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount5
totalVerbs219
matches
0"was moving"
1"was learning"
2"were turning"
3"were bellowing"
4"were not counting"
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount0
semicolonCount0
flaggedSentences0
totalSentences131
ratio0
matches(empty)
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1284
adjectiveStacks0
stackExamples(empty)
adverbCount51
adverbRatio0.0397196261682243
lyAdverbCount11
lyAdverbRatio0.008566978193146417
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences131
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences131
mean10.24
std7.72
cv0.754
sampleLengths
014
116
24
317
45
515
631
78
88
938
109
114
122
136
1419
157
163
1710
184
1919
204
2120
224
239
2415
2519
268
271
2819
294
3029
3112
3213
335
3410
3511
365
3712
386
3914
409
412
4211
4313
4419
453
463
471
4811
4921
57.95% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats13
diversityRatio0.4076923076923077
totalSentences130
uniqueOpeners53
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount4
totalSentences107
matches
0"Then she crouched, unzipped the"
1"Somewhere behind her, a twig"
2"Only there, with her hands"
3"Then it kept changing, too"
ratio0.037
29.35% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount51
totalSentences107
matches
0"She'd noted that and decided"
1"She checked the slip again"
2"She had used it once,"
3"She had decided that was"
4"She was a person who"
5"She noticed the absence only"
6"she said, quietly"
7"Her voice went out and"
8"She hadn't put a hand"
9"she told it"
10"It pulsed once, and she"
11"She stepped between two of"
12"It didn't grow warmer, exactly."
13"It grew *softer*, as if"
14"They stood perfectly still, though"
15"She stood a moment, letting"
16"She waited the polite length"
17"She could be back on"
18"She didn't move."
19"Her phone said 11:31."
ratio0.477
58.13% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount86
totalSentences107
matches
0"The order had come through"
1"Yu-Fei had held the ticket"
2"The pedestrian gate at Petersham"
3"She'd noted that and decided"
4"She checked the slip again"
5"Nobody in London called her"
6"She had used it once,"
7"She had decided that was"
8"Coincidences were cheap."
9"She was a person who"
10"The rut was on."
11"Tonight there was nothing."
12"She noticed the absence only"
13"she said, quietly"
14"Her voice went out and"
15"The oaks rose ahead, black"
16"Oak-dark and grained like wood,"
17"The pendant was warm."
18"She hadn't put a hand"
19"Rory pulled the silver chain"
ratio0.804
46.73% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences107
matches
0"Now the gravel had given"
ratio0.009
91.84% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences56
technicalSentenceCount4
matches
0"She was a person who paid her rent with them."
1"The oaks rose ahead, black against a sky that was somehow too clear for London."
2"Oak-dark and grained like wood, but stone all the same, each one leaning a little inward as though listening."
3"She hadn't put a hand to it, but she felt it against her breastbone, a small steady heat through her jumper, as if someone had pressed a thumb there."
0.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags7
uselessAdditionCount2
matches
0"she said, quietly"
1"she said, and her voice was steady, which surprised her"
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags6
fancyCount0
fancyTags(empty)
dialogueSentences13
tagDensity0.462
leniency0.923
rawRatio0
effectiveRatio0
83.6669%