Run: 2026-09-23-01M37Q6KFS1EQCPK74RSCSTT8M

Run Details

Duration:
44.2s
Cost:
$0.068948
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 Sawyers Hill was lower than it looked from the road, which was the first thing that went right all night and, Rory would think later, probably the last. She dropped onto the grass on the far side and crouched there with her palms flat against the cold, listening. Richmond Park after dark was not silent. It was simply emptied of people, which left room for everything else: the dry rattle of bracken, an owl working through its two notes somewhere east, the far-off sigh of the A3 like surf against a shore she couldn't see. The gates had closed at dusk. The deer owned the place now, and they didn't care for visitors. Isolde had said midnight. *Come alone, come on foot, and don't bring anything iron.* Rory had left her bike chained outside the Golden Empress and her keys in the flat above Silas' bar, and she felt the lack of them the way you feel a missing tooth, a small hollow her attention kept returning to. She walked. The moon was a thin, reluctant thing behind cloud, and she didn't use her phone torch because Isolde had told her not to, and because some small, animal part of her didn't want to be the only lit thing for a mile in any direction. It took twenty minutes to find the first stone. It wasn't really a stone. That had confused her the first time, back in the summer, when Isolde led her here by the hand and laughed at her face. Ancient oak, grey and fissured, worn so smooth and so old that it had forgotten being a tree. Nine of them stood in a loose ring among the bracken, each one about the height of a man, and between them the air had a texture, a faint resistance, like walking through the surface of warm water. Rory put her hand on the first stone and stepped through. The cold went away. That was expected. So was the smell, green and honeyed and absurd for November, and the wildflowers, which crowded the clearing knee-deep in the dark: foxgloves and campion and something pale she'd never learned the name of, all of them open as if it were noon in June. The grove never slept. Isolde said it didn't know how. What she hadn't expected was the quiet. Outside the stones there had been the owl, the bracken, the road. In here there was nothing. Not the gentle nothing of a still night, but a stopped, held nothing, as though the clearing had drawn in a breath when she entered and hadn't let it out. "Isolde?" Her voice didn't carry. It fell from her mouth and landed in the flowers a few feet away, and the grove absorbed it without comment. Rory checked her phone out of habit, cupping the screen against her coat. 23:58. No signal, which she'd known there wouldn't be. She was early. Fine. She'd wait. She found the flat-topped stump near the centre where Isolde usually sat, and she didn't sit on it. She couldn't have said why. She stood beside it instead, hands in her pockets, and let her eyes adjust. It was then that she noticed the warmth against her breastbone. She drew the Heartstone out on its silver chain and looked at it. The pendant lay in her palm no bigger than her thumbnail, deep crimson, and the faint inner glow she'd grown used to seeing had thickened into something that almost looked like a pulse. Warm. Warmer than her skin. Beating slowly, steadily, like a thing with its own small heart. She knew what that meant. She'd felt it twice before, and both times she'd been standing within sight of a Hel portal. Rory turned in a slow circle. Nine stones. Flowers. The dark edge of the clearing where the pocket-world thinned back into the park. Nothing that looked like a tear in the air, nothing that smelled of sulphur or rot. The grove was Fae ground. It belonged to Isolde's people, and they guarded it jealously. Hel had no business here. *Then why is it warm, Carter?* She tucked the pendant back inside her collar and felt it settle against her skin, throbbing gently, and she wished she hadn't looked at it at all. 23:58. She frowned at the phone. She'd been standing here at least three minutes. Longer. The number sat unmoving on the screen, and she watched it for a full slow count of sixty, and it stayed 23:58. Time moves differently inside, Isolde had told her. *An hour for us might be a minute for you, or a week. Don't think about it too hard.* Rory put the phone away and tried not to think about it too hard. Something rustled on her left. She turned her head without moving the rest of her body. The flowers there stood motionless. Tall foxgloves, their spotted bells hanging open. Nothing beneath them. No deer, no fox. The sound had been soft and deliberate, a single step through foliage, and then it had stopped. "Isolde, if this is a joke—" It hadn't been Isolde. Isolde didn't make noise when she walked. None of them did. Rory breathed in through her nose and out through her mouth, the way she'd taught herself to do in the flat she'd shared with Evan, back when the quiet in the next room could mean anything. Cool head. Think. The clearing was maybe forty feet across. She could see all of it, more or less. If something were standing among those flowers she'd see it. She looked across the grove, to the stones on the far side, and in the corner of her eye the foxgloves on her left leaned toward her. She snapped her head round. They were upright. Of course they were. Plants didn't lean. She counted the stones instead, because counting was a thing her mind could hold. One, by the gap where she'd come in. Two. Three, split down its length by some old lightning strike. Four, five, six. Seven, with the knot like a closed eye. Eight. Nine. Ten. She stopped. She counted again, slowly, pointing with her finger now like a child, hating how the finger trembled. One through nine. And the tenth, standing a little apart between the eighth and the ninth, where she was almost sure there had been a gap. Grey. Man-height. Smooth. Nine, Isolde had said. The ring had always been nine. Rory did not take her eyes off the tenth stone. It didn't move. It was very good at not moving. And the longer she looked at it, the more she thought its surface was a slightly different grey from the others, a slightly softer grey, the colour of old skin, of something that had been standing in the dark for a very long time learning how to look like wood. The pendant beat against her chest. Faster now. "Rory." The voice came from behind her. Warm, amused, pitched low. Isolde's voice, unmistakably, down to the lilt she put on the *r*. Rory didn't turn around. She wanted to. Every muscle in her neck wanted to. But Isolde never called her Rory. Isolde called her *little mortal* or *Carter* or, when she was being unkind, *Malphora*, and she had never once, in all the months they'd known each other, used the name Rory's friends used. "Rory," the voice said again, closer. "You came." Footsteps in the flowers. Unhurried. Each one placed with care, as if whatever was making them was still practising. Rory kept her eyes on the tenth stone, because it was the only thing in the clearing she was sure of, and as she watched, the tenth stone was no longer there. The gap between the eighth and the ninth stood empty and dark, the flowers in it gently swaying, as though something tall had only just walked through them. The footsteps behind her stopped. She could feel it now. Not breath, nothing so honest as breath. Just a presence, the way you can feel someone standing over your bed with your eyes closed. Close enough to touch the back of her neck. Patient. Waiting for her to turn. The crescent scar on her left wrist began, very faintly, to itch. Rory looked down at her phone, still clutched in her pocket, and brought it out slowly, and tilted the screen so that its black edge caught, like a mirror, a sliver of what stood at her shoulder. 23:58, said the screen. She did not look at the reflection. She put the phone face down against her thigh, and closed her eyes, and in the dark behind her lids she began, very quietly, to walk backward toward the gap she'd come in by, counting her steps, while the voice that wasn't Isolde's said her name, and said it, and said it, in no hurry at all.
created_at"2026-09-23T18:07:15.466Z" 9/23/2026, 6:07:15 PM
model"anthropic/claude-opus-5.5-20260921"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4926
moderation_latency(null)
generation_time44131
tokens_prompt792
tokens_completion2360
native_tokens_prompt1172
native_tokens_completion3213
native_tokens_completion_images(null)
native_tokens_reasoning478
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"
usage0.068948
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790186835-78nhqPzuKMmPwtt8HiPF"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790186835-fJUEQVFc5AphFrrpzy2a"
upstream_id"msg_011CfLpKcCk4NLay9pJHV7pD"
provider_responses
0
endpoint_id"3a2388bc-3740-4e64-a1f5-4e301726b6b9"
id"msg_011CfLpKcCk4NLay9pJHV7pD"
is_byokfalse
latency1294
model_permaslug"anthropic/claude-opus-5.5-20260921"
provider_name"Claude Platform on AWS"
status200
total_cost0.068948
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
0.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags2
adverbTagCount1
adverbTags
0"the voice said again [again]"
dialogueSentences5
tagDensity0.4
leniency0.8
rawRatio0.5
effectiveRatio0.4
59.65% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1487
totalAiIsmAdverbs12
found
0
adverb"really"
count1
1
adverb"slowly"
count3
2
adverb"gently"
count2
3
adverb"very"
count4
4
adverb"slightly"
count2
highlights
0"really"
1"slowly"
2"gently"
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)
76.46% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1487
totalAiIsms7
found
0
word"warmth"
count1
1
word"pulse"
count1
2
word"trembled"
count1
3
word"lilt"
count1
4
word"footsteps"
count2
5
word"could feel"
count1
highlights
0"warmth"
1"pulse"
2"trembled"
3"lilt"
4"footsteps"
5"could feel"
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
narrationSentences134
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount0
narrationSentences134
filterMatches(empty)
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences138
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen57
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans7
markdownWords40
totalWords1487
ratio0.027
matches
0"Come alone, come on foot, and don't bring anything iron."
1"Then why is it warm, Carter?"
2"An hour for us might be a minute for you, or a week. Don't think about it too hard."
3"r"
4"little mortal"
5"Carter"
6"Malphora"
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions7
unquotedAttributions0
matches(empty)
83.33% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions44
wordCount1452
uniqueNames15
maxNameDensity0.96
worstName"Isolde"
maxWindowNameDensity2.5
worstWindowName"Rory"
discoveredNames
Sawyers1
Hill1
Rory13
Park1
Golden1
Empress1
Isolde14
November1
June1
Heartstone1
Hel2
Fae1
Evan1
Footsteps1
Nine4
persons
0"Rory"
1"Isolde"
2"Hel"
3"Evan"
places
0"Sawyers"
1"Hill"
2"Park"
3"Golden"
4"June"
5"Nine"
globalScore1
windowScore0.833
83.33% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences75
glossingSentenceCount2
matches
0"looked like a pulse"
1"looked like a tear in the air, nothing th"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.672
wordCount1487
matches
0"Not the gentle nothing of a still night, but a stopped, held nothing, as though the clearing had drawn in"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences138
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs53
mean28.06
std23.67
cv0.844
sampleLengths
031
185
255
347
49
585
611
762
87
947
101
1125
1228
1337
1411
1562
1622
176
1853
196
2027
211
2236
2327
2414
255
2647
276
2815
2965
3027
3115
3245
331
341
352
3646
3710
3870
398
401
4122
424
4349
448
4519
4660
475
4844
4912
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount0
totalSentences134
matches(empty)
89.35% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount4
totalVerbs241
matches
0"were standing"
1"was being"
2"was making"
3"was still practising"
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount0
semicolonCount0
flaggedSentences0
totalSentences138
ratio0
matches(empty)
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount152
adjectiveStacks0
stackExamples(empty)
adverbCount6
adverbRatio0.039473684210526314
lyAdverbCount2
lyAdverbRatio0.013157894736842105
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences138
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences138
mean10.78
std11.7
cv1.086
sampleLengths
031
120
27
340
46
512
64
751
82
945
109
115
1224
1318
1438
1511
164
173
1845
194
206
217
2212
235
2430
251
264
2721
2813
291
308
313
321
332
3418
355
3614
3711
3813
3933
401
414
4211
435
4417
456
462
471
4814
4916
65.20% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats13
diversityRatio0.4485294117647059
totalSentences136
uniqueOpeners61
89.29% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount3
totalSentences112
matches
0"*Then why is it warm,"
1"Of course they were."
2"Just a presence, the way"
ratio0.027
100.00% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount32
totalSentences112
matches
0"She dropped onto the grass"
1"It was simply emptied of"
2"It took twenty minutes to"
3"It wasn't really a stone."
4"Her voice didn't carry."
5"It fell from her mouth"
6"She was early."
7"She found the flat-topped stump"
8"She couldn't have said why."
9"She stood beside it instead,"
10"It was then that she"
11"She drew the Heartstone out"
12"She knew what that meant."
13"She'd felt it twice before,"
14"It belonged to Isolde's people,"
15"She tucked the pendant back"
16"She frowned at the phone."
17"She'd been standing here at"
18"She turned her head without"
19"It hadn't been Isolde."
ratio0.286
100.00% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount79
totalSentences112
matches
0"The wall along Sawyers Hill"
1"She dropped onto the grass"
2"Richmond Park after dark was"
3"It was simply emptied of"
4"The gates had closed at"
5"The deer owned the place"
6"Isolde had said midnight."
7"The moon was a thin,"
8"It took twenty minutes to"
9"It wasn't really a stone."
10"That had confused her the"
11"Rory put her hand on"
12"The cold went away."
13"That was expected."
14"The grove never slept."
15"Isolde said it didn't know"
16"Her voice didn't carry."
17"It fell from her mouth"
18"Rory checked her phone out"
19"She was early."
ratio0.705
44.64% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences112
matches
0"If something were standing among"
ratio0.009
83.33% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences48
technicalSentenceCount4
matches
0"So was the smell, green and honeyed and absurd for November, and the wildflowers, which crowded the clearing knee-deep in the dark: foxgloves and campion and so…"
1"And the longer she looked at it, the more she thought its surface was a slightly different grey from the others, a slightly softer grey, the colour of old skin,…"
2"The gap between the eighth and the ninth stood empty and dark, the flowers in it gently swaying, as though something tall had only just walked through them."
3"She put the phone face down against her thigh, and closed her eyes, and in the dark behind her lids she began, very quietly, to walk backward toward the gap she…"
0.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags2
uselessAdditionCount1
matches
0"the voice said again, closer"
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags1
fancyCount0
fancyTags(empty)
dialogueSentences5
tagDensity0.2
leniency0.4
rawRatio0
effectiveRatio0
85.8196%