Run: 2026-09-29-01M3P2J1C7J319W7B50RKNSSES

Run Details

Duration:
20.6s
Cost:
$0.021004
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 bike at the edge of the park, chained to a signpost that had gone soft with lichen, and told herself the delivery was the reason she was here. It was a thin excuse. The Golden Empress did not deliver to Richmond Park at eleven at night. But the order slip in her jacket pocket had said *Isolde's grove, back of the old oaks*, in handwriting she didn't recognise, and the pendant had been warm against her sternum since Putney Bridge. Warm, and then warmer. It was not a comfortable warmth. It was the warmth of a hand that has been pressed to your chest a little too long. She pulled the collar of her jacket up and started across the grass. The night was dry and cold, and the deer had gone quiet. That was the first thing. Richmond was never silent after dark; she'd cut through it once in October and heard the rut echoing off the trees like men shouting across a valley. Tonight there was only the whisper of her trainers in the wet grass and her own breath, too loud, too regular, like someone walking a step behind her and matching her rhythm. She stopped. The breathing stopped a half second later. "Right," she said, quietly. "Wind." There was no wind. She kept going. Her phone said 23:14 and one bar of signal, and as she watched, the bar flickered and went out. She thumbed the torch on. The beam was a pale, narrow thing that made the dark on either side seem thicker. Trees rose at the edges of it, stripped and black, and she found herself keeping to the centre of the path as though the verges had edges she could fall off. The oaks appeared sooner than they should have. She had walked, what, ten minutes? They stood in a rough ring, six of them, broad as doorways and set so evenly that no one could have believed they had grown there by accident. Between two of them, the ground dipped into a kind of gate. Old stone showed through the roots. Not oak, though the guidebooks would have called them that, and she'd have believed the guidebooks until she put her palm against the nearest trunk and felt it hum, low and constant, like a fridge in an empty house. The pendant burned. She pulled it out from under her collar. The crimson stone was lit from inside, a slow pulse like a heartbeat seen through a closed eyelid. The silver chain was cold as a coin against her fingers, which made the heat of the gem stranger still. "Okay," she whispered. "Okay. I get it. We're close." She stepped between the stones. The air changed the way it does when you walk into a warm shop from the street. It pressed against her face, soft and faintly sweet. Her ears popped. And the sound came back all at once, the deer, the night insects, a distant plane, and she nearly wept with the relief of it before she understood what was wrong. It was the wrong season. Crickets, in February. The clearing opened around her, wide and shallow as a bowl. Wildflowers grew waist-high in the torchlight: foxglove, campion, something pale and star-shaped she couldn't name. All of them were open. All of them were turned, very slightly, toward her. "Hello?" Her voice came out smaller than she'd meant. "Delivery." She almost laughed at that. Nobody answered. Nothing moved. But the flowers, without wind, without any breath of air, nodded once, together, like a congregation. Rory lowered the torch and made herself stand still. Cool-headed, her mother had called her, back in Cardiff, when she was nine and had talked her way out of a locked school toilet by convincing a caretaker she was a fire inspector's daughter. *Think, Aurora. What do you actually know?* She knew the grove was old. She knew that Eva had once, drunk and half-laughing, told her that Richmond had a place where an hour could cost you a week. She knew the pendant only ran hot near one kind of thing. She did not let herself finish that thought. Something moved at the edge of her vision. She turned her head. Nothing: flowers, the pale trunk of a birch, a gap of dark between. But the gap was wider than it had been. She was sure of it. She had noted that space when she came in, a hand's breadth between the birch and the bracken, and now it was the width of a doorway. She swung the torch onto it. The light went in and did not come back. It didn't illuminate anything. It simply thinned, the way a voice thins in a very large room. "Not funny," she said. Behind her, softly, a twig snapped. She didn't spin. She'd read once that prey animals freeze because movement is what predators see, and she felt the truth of it, felt every muscle in her back go rigid with the effort of being nothing. Slowly, she turned her wrist to check her phone. The crescent scar there was white in the torchlight. The screen read 23:14. It had read 23:14 when she'd stepped between the stones. She watched the display. The colon blinked. The minute did not change. Another twig snapped, closer, and this time she heard, threaded beneath it, the slow wet sound of something drawing breath through a mouth that was not shaped for it. It was in rhythm with hers. When she held her breath, it held. "I'm just going to go," Rory said, very evenly. "I'm going to walk back the way I came, and you're going to let me." The flowers had all turned again. Every one of them now faced the gap in the dark. The pendant flared against her chest, bright enough to throw red across her knuckles, and the warmth was no longer a warning. It was a hand closing on her. She ran. The stones were forty feet away, then thirty, and they did not seem to be getting nearer. Behind her the breathing broke rhythm and began, patiently, to walk.
created_at"2026-09-29T07:55:06.511Z" 9/29/2026, 7:55:06 AM
model"anthropic/claude-sonnet-5.5-20260928"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency20565
moderation_latency(null)
generation_time20565
tokens_prompt792
tokens_completion1420
native_tokens_prompt1172
native_tokens_completion1866
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"
usage0.021004
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790668506-YTMnFMypZ5rnZYh4Hajk"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790668506-TvdTum8wJF4oyNjJKyWd"
upstream_id"msg_011CfXNVeXC4fMGhN33B5Exy"
provider_responses
0
endpoint_id"99aaad94-923b-4fc1-b763-271ed5486f7a"
id"msg_011CfXNVeXC4fMGhN33B5Exy"
is_byokfalse
latency695
model_permaslug"anthropic/claude-sonnet-5.5-20260928"
provider_name"Claude Platform on AWS"
status200
total_cost0.021004
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
totalTags5
adverbTagCount0
adverbTags(empty)
dialogueSentences9
tagDensity0.556
leniency1
rawRatio0
effectiveRatio0
70.82% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1028
totalAiIsmAdverbs6
found
0
adverb"very"
count3
1
adverb"slightly"
count1
2
adverb"softly"
count1
3
adverb"slowly"
count1
highlights
0"very"
1"slightly"
2"softly"
3"slowly"
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)
61.09% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1028
totalAiIsms8
found
0
word"comfortable"
count1
1
word"warmth"
count3
2
word"echoing"
count1
3
word"whisper"
count1
4
word"flickered"
count1
5
word"pulse"
count1
highlights
0"comfortable"
1"warmth"
2"echoing"
3"whisper"
4"flickered"
5"pulse"
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
narrationSentences88
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount1
hedgeCount1
narrationSentences88
filterMatches
0"see"
hedgeMatches
0"seem to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences92
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen39
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans2
markdownWords14
totalWords1028
ratio0.014
matches
0"Isolde's grove, back of the old oaks"
1"Think, Aurora. What do you actually know?"
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions8
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions16
wordCount995
uniqueNames12
maxNameDensity0.3
worstName"Richmond"
maxWindowNameDensity1
worstWindowName"Richmond"
discoveredNames
Golden1
Empress1
Richmond3
Park1
Putney1
Bridge1
October1
February1
Cardiff1
Aurora1
Eva1
Rory3
persons
0"Empress"
1"Eva"
2"Rory"
places
0"Richmond"
1"Park"
2"Putney"
3"Bridge"
4"October"
5"February"
6"Cardiff"
globalScore1
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences57
glossingSentenceCount1
matches
0"appeared sooner than they should have"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1028
matches(empty)
94.20% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount2
totalSentences92
matches
0"knew that Eva"
1"noted that space"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs34
mean30.24
std26.2
cv0.866
sampleLengths
031
180
213
376
49
55
64
774
899
93
1046
119
125
1360
148
1540
1610
1725
1850
1950
208
2158
2232
234
246
2559
2610
2712
2842
2924
3017
3129
322
3328
93.30% Passive voice overuse
Target: ≤2% passive sentences
passiveCount3
totalSentences88
matches
0"been pressed"
1"was lit"
2"were turned"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount0
totalVerbs171
matches(empty)
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount0
semicolonCount1
flaggedSentences1
totalSentences92
ratio0.011
matches
0"Richmond was never silent after dark; she'd cut through it once in October and heard the rut echoing off the trees like men shouting across a valley."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount999
adjectiveStacks0
stackExamples(empty)
adverbCount37
adverbRatio0.037037037037037035
lyAdverbCount13
lyAdverbRatio0.013013013013013013
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences92
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences92
mean11.17
std9.32
cv0.834
sampleLengths
031
15
213
334
44
56
618
713
812
95
1027
1132
122
137
144
151
164
173
1819
195
2016
2131
228
236
2428
2512
266
2739
283
298
3018
3120
323
336
345
3517
369
373
3831
395
403
4111
4215
435
449
459
461
475
482
492
51.81% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats14
diversityRatio0.40217391304347827
totalSentences92
uniqueOpeners37
41.15% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount1
totalSentences81
matches
0"Slowly, she turned her wrist"
ratio0.012
57.04% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount33
totalSentences81
matches
0"It was a thin excuse."
1"It was not a comfortable"
2"It was the warmth of"
3"She pulled the collar of"
4"she said, quietly"
5"She kept going."
6"Her phone said 23:14 and"
7"She thumbed the torch on."
8"She had walked, what, ten"
9"They stood in a rough"
10"She pulled it out from"
11"She stepped between the stones."
12"It pressed against her face,"
13"Her ears popped."
14"It was the wrong season."
15"Her voice came out smaller"
16"She almost laughed at that."
17"She knew the grove was"
18"She knew that Eva had"
19"She knew the pendant only"
ratio0.407
71.11% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount63
totalSentences81
matches
0"Rory left the bike at"
1"It was a thin excuse."
2"The Golden Empress did not"
3"It was not a comfortable"
4"It was the warmth of"
5"She pulled the collar of"
6"The night was dry and"
7"That was the first thing."
8"Richmond was never silent after"
9"Tonight there was only the"
10"The breathing stopped a half"
11"she said, quietly"
12"She kept going."
13"Her phone said 23:14 and"
14"She thumbed the torch on."
15"The beam was a pale,"
16"Trees rose at the edges"
17"The oaks appeared sooner than"
18"She had walked, what, ten"
19"They stood in a rough"
ratio0.778
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences81
matches(empty)
ratio0
100.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences34
technicalSentenceCount2
matches
0"The silver chain was cold as a coin against her fingers, which made the heat of the gem stranger still."
1"Another twig snapped, closer, and this time she heard, threaded beneath it, the slow wet sound of something drawing breath through a mouth that was not shaped f…"
25.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags5
uselessAdditionCount1
matches
0"she said, quietly"
38.89% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags4
fancyCount1
fancyTags
0"she whispered (whisper)"
dialogueSentences9
tagDensity0.444
leniency0.889
rawRatio0.25
effectiveRatio0.222
83.4804%