Run: 2026-10-08-01M4DAN5YQ25DGPF8QSHXNWMQE

Run Details

Duration:
14.5s
Cost:
$0.001117
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 gate in the iron railings had been left unlatched, which was the first thing Rory noticed and the first thing she decided not to think about. Richmond Park at half eleven on a Tuesday was supposed to be empty. The deer had their own paths and the joggers had gone home to their dinners, and what remained was the wind moving through bracken and the distant orange smear of the city behind the trees. She had told Eva she was going for a walk. She had not said where. The map on her phone showed nothing useful. The grove was not a place a map could hold. It sat in a blank patch between the oaks, a spot her feet had found twice before without her meaning to look for it, and both times she had come out of the trees with no memory of the path back. This time she had come on purpose. She had her torch, a bottle of water, and the Heartstone pendant under her jumper, cool against her breastbone on the silver chain. It had not been cool for most of the walk. Somewhere past the old oak with the split trunk, it had begun to warm, faint and steady, the way a stone holds the heat of a day. She had told herself it was her body heat, or the jumper, or the wine she had not really drunk. The trees thinned. The path ended in a ring of standing stones, grey and lichen-blotched, each one taller than she was. Between them, the ground was covered in wildflowers. Foxgloves, clover, something pale and starred that she did not know the name of. In October. In the dark. They bent slightly toward her as she stepped between two stones, as if they had heard her coming. "Hello?" she said, and her voice came back thin and wrong, a half-beat late. She switched off the torch. She did not know why, only that the light seemed to be making the shadows at the edges of the clearing crowd closer. The moon was a pale thumbprint behind cloud, and her eyes adjusted slowly, the way they did in Cardiff when the power cut out and she had to feel her way down the stairs of the old house. The silence was the first thing that bothered her. Not total silence. The wind still moved. Somewhere far off a car horn sounded and then did not sound again. But the small noises she had been hearing all the way up the path, the rustle of animals in the undergrowth, the tick of insects, had stopped. The whole grove was holding its breath. Then she heard something that was not the wind. It was a soft sound, rhythmic, like fabric being dragged over grass. It came from her left, from beyond the second stone. She turned her head slowly and listened. It stopped. She waited. It started again, closer, and this time it had a cadence to it, a pause and a drag, pause and drag, the rhythm of something that was learning how to walk. "Eva?" she said, though she knew her friend was in bed in Walthamstow with her phone on silent. Nothing answered. The sound stopped. Rory's left wrist ached, the way it did when the weather turned, and she pressed her thumb against the small crescent scar there, the mark she had carried since she was seven and fell through a fence on Cathays Terrace. She had always thought of it as a reminder to watch where she put her hands. Now she found herself counting the seconds between each sound she did not hear, the way you counted the gap between lightning and thunder. She turned on the torch. The beam swept across the foxgloves and the stones and the black trunks beyond. Nothing. Only the flowers, bowing gently, and the grass flattened in a pale line that ran from one stone to the next, as though something heavy had been pulled through it and then lifted away. She followed the beam with her eyes and found the second stone again. Its face was streaked with a dark damp, like rain had run down it, though it had not rained in days. The pendant burned against her skin. It was not painful. It was insistent, a pulse of heat that matched the beat of her heart and then outran it. She pressed her hand over the jumper, and felt through the wool the stone's small hard shape, warm as a cup of tea. She had been told once, by a man in a grey coat who had pressed the necklace into her hands in a dim café off Queen Street and then left without paying, that the pendant would find what it was meant to find. She had laughed. She had not laughed the night the cold came up through the floorboards of her flat, or the morning she woke with grit under her fingernails and no idea how it had got there. Something moved at the edge of the torchlight. She did not see it so much as notice the absence of it, a patch of dark between two trunks that had been there a moment ago and was now slightly less dark, as if a shape had shifted its weight. She swung the beam. The bracken lay still. The trees stood still. The flowers, which had been bowing toward her, were now bowing toward the same place in the trees, all of them, in a slow, unanimous curve. "Who's there?" Her voice came out steadier than she felt, which was something. The silence answered, and then, from somewhere behind her, very close, something breathed out. Long and patient, like someone who had been waiting a very long time and did not mind waiting a little longer. Rory did not turn around. She understood, with a clarity that felt like cold water, that turning around was the thing it wanted her to do. She kept the torch steady on the trees ahead and took one slow step backward, toward the path, toward the gap between the stones she had come through. The pendant flared hot against her chest. Behind her, the grass began to move again, pause and drag, pause and drag, and this time it was not coming from the left. It was coming from the path she had walked in on.
created_at"2026-10-08T08:39:10.048Z" 10/8/2026, 8:39:10 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2492
moderation_latency(null)
generation_time14498
tokens_prompt792
tokens_completion1533
native_tokens_prompt1172
native_tokens_completion2000
native_tokens_completion_images(null)
native_tokens_reasoning215
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"
usage0.0011172
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448750-AJTiJjuHqfd5YYXFtRBP"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448750-YlDcPbGRPWTFZohS1ZU6"
upstream_id"msg_011CfpU8mLe3Vak7N93gxoP2"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpU8mLe3Vak7N93gxoP2"
is_byokfalse
latency878
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0011172
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
totalTags3
adverbTagCount0
adverbTags(empty)
dialogueSentences3
tagDensity1
leniency1
rawRatio0
effectiveRatio0
62.65% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1071
totalAiIsmAdverbs8
found
0
adverb"really"
count1
1
adverb"slightly"
count2
2
adverb"slowly"
count2
3
adverb"gently"
count1
4
adverb"very"
count2
highlights
0"really"
1"slightly"
2"slowly"
3"gently"
4"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)
67.32% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1071
totalAiIsms7
found
0
word"silence"
count3
1
word"rhythmic"
count1
2
word"reminder"
count1
3
word"pulse"
count1
4
word"weight"
count1
highlights
0"silence"
1"rhythmic"
2"reminder"
3"pulse"
4"weight"
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
narrationSentences71
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount2
narrationSentences71
filterMatches(empty)
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)
analyzedSentences71
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen43
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1071
ratio0
matches(empty)
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
totalMentions14
wordCount1067
uniqueNames12
maxNameDensity0.28
worstName"Rory"
maxWindowNameDensity0.5
worstWindowName"Rory"
discoveredNames
Rory3
Park1
Tuesday1
Eva1
Heartstone1
October1
Cardiff1
Walthamstow1
Cathays1
Terrace1
Queen1
Street1
persons
0"Rory"
1"Eva"
2"Queen"
places
0"Park"
1"October"
2"Cardiff"
3"Walthamstow"
4"Cathays"
5"Terrace"
6"Street"
globalScore1
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences52
glossingSentenceCount1
matches
0"felt like cold water, that turning arou"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1071
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences71
matches
0"starred that she"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs27
mean39.67
std28.38
cv0.715
sampleLengths
075
115
289
357
466
514
666
763
89
964
1018
115
1280
135
1449
1534
166
1745
1880
198
2079
2113
2235
2354
247
2524
2611
70.67% Passive voice overuse
Target: ≤2% passive sentences
passiveCount7
totalSentences71
matches
0"been left"
1"was supposed"
2"was covered"
3"being dragged"
4"been pulled"
5"was streaked"
6"been told"
7"was meant"
6.20% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount5
totalVerbs172
matches
0"was going"
1"was holding"
2"was learning"
3"was not coming"
4"was coming"
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount0
semicolonCount0
flaggedSentences0
totalSentences71
ratio0
matches(empty)
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1069
adjectiveStacks0
stackExamples(empty)
adverbCount35
adverbRatio0.03274087932647334
lyAdverbCount8
lyAdverbRatio0.007483629560336763
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences71
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences71
mean15.08
std11.39
cv0.755
sampleLengths
027
113
235
310
45
58
610
741
87
923
1010
1127
1220
133
1418
158
1614
172
183
1918
2014
215
2223
2338
249
253
264
2713
2827
297
309
3112
3210
337
342
352
3631
3718
382
393
4040
4116
4224
435
4414
451
4634
4713
4821
496
35.21% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats15
diversityRatio0.3380281690140845
totalSentences71
uniqueOpeners24
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount4
totalSentences66
matches
0"Somewhere past the old oak"
1"Somewhere far off a car"
2"Then she heard something that"
3"Only the flowers, bowing gently,"
ratio0.061
32.12% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount31
totalSentences66
matches
0"She had told Eva she"
1"She had not said where."
2"It sat in a blank"
3"She had her torch, a"
4"It had not been cool"
5"She had told herself it"
6"They bent slightly toward her"
7"she said, and her voice"
8"She switched off the torch."
9"She did not know why,"
10"It was a soft sound,"
11"It came from her left,"
12"She turned her head slowly"
13"It started again, closer, and"
14"she said, though she knew"
15"She had always thought of"
16"She turned on the torch."
17"She followed the beam with"
18"Its face was streaked with"
19"It was not painful."
ratio0.47
43.33% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount55
totalSentences66
matches
0"The gate in the iron"
1"Richmond Park at half eleven"
2"The deer had their own"
3"She had told Eva she"
4"She had not said where."
5"The map on her phone"
6"The grove was not a"
7"It sat in a blank"
8"This time she had come"
9"She had her torch, a"
10"It had not been cool"
11"She had told herself it"
12"The trees thinned."
13"The path ended in a"
14"Foxgloves, clover, something pale and"
15"They bent slightly toward her"
16"she said, and her voice"
17"She switched off the torch."
18"She did not know why,"
19"The moon was a pale"
ratio0.833
75.76% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences66
matches
0"Now she found herself counting"
ratio0.015
51.28% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences39
technicalSentenceCount5
matches
0"Only the flowers, bowing gently, and the grass flattened in a pale line that ran from one stone to the next, as though something heavy had been pulled through i…"
1"It was insistent, a pulse of heat that matched the beat of her heart and then outran it."
2"She did not see it so much as notice the absence of it, a patch of dark between two trunks that had been there a moment ago and was now slightly less dark, as i…"
3"The flowers, which had been bowing toward her, were now bowing toward the same place in the trees, all of them, in a slow, unanimous curve."
4"Long and patient, like someone who had been waiting a very long time and did not mind waiting a little longer."
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags3
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags2
fancyCount0
fancyTags(empty)
dialogueSentences3
tagDensity0.667
leniency1
rawRatio0
effectiveRatio0
84.8183%