Run: 2026-10-08-01M4DA9B71S2GA9HS0J9RVVSJS

Run Details

Duration:
13.9s
Cost:
$0.001105
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 park gate had been locked, so Rory climbed the low railing past the sign warning visitors that the deer were dangerous in rut. She landed badly on the far side, palms scraping gravel, and stayed crouched a moment listening. Traffic hummed somewhere beyond the trees, a dull, distant surf. Then even that thinned out, and she realised she could no longer hear it at all. She stood and brushed off her hands. Her phone showed 11:52. Good. Midnight was when the old oaks were supposed to be most open, according to the one page on the internet that had got the directions right, written by someone who had clearly been very frightened when they wrote it. The path bent left, then right, then left again, following the old boundary bank. Bracken brushed her jeans. The air smelled wrong, too sweet, like cut stems left too long in a vase. Halfway along, she stopped at a patch of ground beside the path and crouched. Foxgloves. Wild thyme. A cluster of white campion, all of it in full bloom. It was the second week of November. Frost should have been silvering the grass by now, but the petals were unbruised and open, and the bees, if there had been bees, would have been drunk on them. She didn't touch them. The pendant shifted against her breastbone. She had worn it for four months now, since the envelope had appeared through the letterbox of the flat above Silas' bar with nothing inside but the silver chain and the deep crimson stone, and a note in careful handwriting that said only *you will need this*. Most days it was cold, a dead weight of metal. Tonight it had been warm since the gate, a faint, steady heat, like a hand resting on her sternum. Rory had told herself that was the walk. She was not sure she believed it anymore. She reached the first standing stone just after midnight by her watch. It was taller than she had expected, grey-green with lichen, and it leaned slightly, as if it had been listening to something for a very long time and had grown tired of it. Oak had been carved into its surface in a pattern of knots that might have been accidental, except that when she looked at them directly they seemed to rearrange themselves into the suggestion of a face, then didn't. She put her palm flat against the bark of the next oak in the ring and held it there. It was warm. Not sun-warm, which was impossible, but blood-warm, the way a sleeping animal is warm. *Stay on the path,* the page had said. *Do not answer your name.* She had laughed at that when she first read it, lying on her bed above the bar with the bass from downstairs coming up through the floorboards. She was not laughing now. The clearing opened ahead, a rough circle of pale grass under the bare arms of the trees. At its centre sat a flat grey stone, and beside it the fallen trunk of a great oak, its root plate lifted and raw. The wildflowers grew thickest here, a tide of blue and white. Rory's breath fogged in front of her, and she watched it hang in the still air, not drifting, not dispersing. Something moved at the edge of her vision. She turned her head slowly. Nothing. Trees, bracken, the pale shapes of the flowers. But when she looked back at the clearing, there was a figure standing by the fallen trunk, and it had not been there a moment before. Tall, narrow, the colour of birch bark. It was turned away from her, head tilted, as though listening to the stone. Rory did not move. She counted her breaths, the way she had done as a child in Cardiff when her father's voice rose in the kitchen. In. Out. Hold. The figure did not turn. Her watch said 12:07. Then, when she glanced at it again, 12:19. The second hand was moving, but the numbers kept sliding, as if the minutes were being poured from one glass into another without her being allowed to see the join. *An hour inside can be minutes or days outside,* she thought, with the dry, precise part of her mind that had once been destined for courtrooms. *Which means I could be missing a week right now. Or I could be missing the last ten minutes. Or I could already have been missing for years.* Her phone buzzed in her pocket. She did not take it out. She knew who it would be. Eva would be asleep in the flat with the lights off, and she would have set an alarm for 3 a.m. to check the messages, the way she had since Rory left Cardiff. Behind her, very softly, a voice said her name. Not *Rory*. The other one. The one nobody used. *Do not answer.* The pendant burned against her skin now, so hot it was almost painful, and she understood with a cold drop in her stomach that it was not warming her because she was safe. It was warming because something on the other side of the trees was waiting for her to step into the clearing, and the heat was the thing pointing the way. She heard footsteps on the leaf mould behind her. Light, unhurried, measured to match her own. Rory stopped counting breaths. She turned, very slowly, keeping her hand flat against her chest, and looked back down the path she had come. The stone on the path was no longer there. The gate was no longer there. Where the boundary bank should have run, there was only a long, unbroken line of oaks, each one leaning a little toward the centre of the grove, as though they had been standing that way for centuries and had only now decided to notice her. The footsteps stopped. In the clearing, the figure by the fallen trunk finally lifted its head, and she heard it breathe in, the way someone does when they have caught a scent.
created_at"2026-10-08T08:32:42.216Z" 10/8/2026, 8:32:42 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2912
moderation_latency(null)
generation_time13886
tokens_prompt792
tokens_completion1488
native_tokens_prompt1172
native_tokens_completion1975
native_tokens_completion_images(null)
native_tokens_reasoning187
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"
usage0.0011047
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448362-XUVGgED7Mckwx1sU5Xmr"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448362-PeGnTkqnljysbKf6gl0N"
upstream_id"msg_011CfpTeAnUQBgmhp7pwvzuj"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpTeAnUQBgmhp7pwvzuj"
is_byokfalse
latency806
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0011047
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
totalTags1
adverbTagCount0
adverbTags(empty)
dialogueSentences0
tagDensity1
leniency1
rawRatio0
effectiveRatio0
60.75% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1019
totalAiIsmAdverbs8
found
0
adverb"very"
count4
1
adverb"slightly"
count1
2
adverb"slowly"
count2
3
adverb"softly"
count1
highlights
0"very"
1"slightly"
2"slowly"
3"softly"
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)
75.47% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1019
totalAiIsms5
found
0
word"weight"
count1
1
word"stomach"
count1
2
word"footsteps"
count2
3
word"measured"
count1
highlights
0"weight"
1"stomach"
2"footsteps"
3"measured"
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
narrationSentences78
matches(empty)
87.91% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount2
hedgeCount1
narrationSentences78
filterMatches
0"watch"
hedgeMatches
0"seemed to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences78
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen47
ratio0
matches(empty)
94.01% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans7
markdownWords54
totalWords1019
ratio0.053
matches
0"you will need this"
1"Stay on the path,"
2"Do not answer your name."
3"An hour inside can be minutes or days outside,"
4"Which means I could be missing a week right now. Or I could be missing the last ten minutes. Or I could already have been missing for years."
5"Rory"
6"Do not answer."
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions1
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions10
wordCount992
uniqueNames3
maxNameDensity0.71
worstName"Rory"
maxWindowNameDensity1.5
worstWindowName"Rory"
discoveredNames
Rory7
November1
Cardiff2
persons
0"Rory"
places
0"Cardiff"
globalScore1
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences56
glossingSentenceCount1
matches
0"as though listening to the stone"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.981
wordCount1019
matches
0"Not sun-warm, which was impossible, but blood-warm, the way a sleeping animal is warm"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences78
matches
0"standing that way"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs28
mean36.39
std25.37
cv0.697
sampleLengths
066
151
247
351
44
582
616
783
836
940
105
1172
128
1361
1429
155
1642
1754
1851
199
209
213
2263
2316
2424
2560
263
2729
78.27% Passive voice overuse
Target: ≤2% passive sentences
passiveCount6
totalSentences78
matches
0"been locked"
1"were supposed"
2"been carved"
3"was turned"
4"being poured"
5"being allowed"
6"been destined"
35.39% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount4
totalVerbs162
matches
0"was not laughing"
1"was not warming"
2"was warming"
3"was waiting"
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount0
semicolonCount0
flaggedSentences0
totalSentences78
ratio0
matches(empty)
70.71% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount245
adjectiveStacks0
stackExamples(empty)
adverbCount18
adverbRatio0.07346938775510205
lyAdverbCount2
lyAdverbRatio0.00816326530612245
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences78
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences78
mean13.06
std11.11
cv0.85
sampleLengths
024
116
210
316
47
54
61
739
814
94
1015
1114
121
132
1411
157
1630
174
186
1947
2010
2119
228
238
2412
2533
2638
2719
283
2914
308
3132
325
3317
3424
3511
3620
378
385
391
408
4126
427
4314
444
4522
461
471
481
495
74.79% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats5
diversityRatio0.48717948717948717
totalSentences78
uniqueOpeners38
95.24% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount2
totalSentences70
matches
0"Then even that thinned out,"
1"Then, when she glanced at"
ratio0.029
94.29% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount22
totalSentences70
matches
0"She landed badly on the"
1"She stood and brushed off"
2"Her phone showed 11:52."
3"It was the second week"
4"She didn't touch them."
5"She had worn it for"
6"She was not sure she"
7"She reached the first standing"
8"It was taller than she"
9"She put her palm flat"
10"It was warm."
11"She was not laughing now."
12"She turned her head slowly."
13"It was turned away from"
14"She counted her breaths, the"
15"Her watch said 12:07."
16"Her phone buzzed in her"
17"She did not take it"
18"She knew who it would"
19"It was warming because something"
ratio0.314
88.57% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount52
totalSentences70
matches
0"The park gate had been"
1"She landed badly on the"
2"Traffic hummed somewhere beyond the"
3"She stood and brushed off"
4"Her phone showed 11:52."
5"Midnight was when the old"
6"The path bent left, then"
7"The air smelled wrong, too"
8"Halfway along, she stopped at"
9"A cluster of white campion,"
10"It was the second week"
11"Frost should have been silvering"
12"She didn't touch them."
13"The pendant shifted against her"
14"She had worn it for"
15"Tonight it had been warm"
16"Rory had told herself that"
17"She was not sure she"
18"She reached the first standing"
19"It was taller than she"
ratio0.743
71.43% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences70
matches
0"to check the messages, the"
ratio0.014
40.82% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences35
technicalSentenceCount5
matches
0"Midnight was when the old oaks were supposed to be most open, according to the one page on the internet that had got the directions right, written by someone wh…"
1"It was taller than she had expected, grey-green with lichen, and it leaned slightly, as if it had been listening to something for a very long time and had grown…"
2"Oak had been carved into its surface in a pattern of knots that might have been accidental, except that when she looked at them directly they seemed to rearrang…"
3"*An hour inside can be minutes or days outside,* she thought, with the dry, precise part of her mind that had once been destined for courtrooms."
4"Where the boundary bank should have run, there was only a long, unbroken line of oaks, each one leaning a little toward the centre of the grove, as though they …"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags1
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags0
88.9214%