Run: 2026-09-29-01M3P2D67WWRRDBRZ38ZKA87K0

Run Details

Duration:
31.7s
Cost:
$0.032074
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 at Robin Hood Wall was locked, so Rory climbed it, and the first wrong thing was how quiet the park became once she dropped down on the other side. Richmond Park at night was never silent. She had cut through it on the bike in summer, and there had always been something: traffic bleeding in from the A3, the coughing bark of deer, wind working through the bracken. Now there was only the crunch of her own boots on frosted grass, and even that seemed to fall away too quickly, as though the dark were swallowing each step. She checked her phone. 11:42. One bar of signal. Eva's message still sat at the top of the screen. *Grove. Come now. Please don't tell anyone.* Eva never said please. Eva said *hurry up, Rory* and *you're such a snail*, and sent voice notes that ran six minutes and ended mid-sentence. This message had no emoji, no typos. Rory had called four times on the Tube and got straight to voicemail four times, and every time she had told herself that a bad feeling was not evidence. She followed the path Eva had once shown her, past the pond, past the dead oak split by lightning, and into the dense trees beyond. Eva had called it Isolde's grove and laughed when she said it. *Don't ask. Just don't go alone.* Rory zipped her jacket to her chin. Under it, against her sternum, the Heartstone lay cold on its silver chain. Cold was right. She held onto that. The trees closed in. She walked with her phone torch pointed low, and the beam picked out roots, leaf litter, the pale frayed edge of a rabbit run. Behind her a twig snapped. She stopped. The sound had not come from far away. It had come from just behind her left shoulder, close enough that she should have felt breath. She turned, slowly, and swept the torch across the path. Empty trunks. A slick of frost. Nothing. "Eva?" Her voice came out flat and small. "If this is a joke, I'll kill you." No answer. But the silence had a texture now, the held-breath quality of a room where someone has just stopped speaking. She walked on, faster. After a few paces she noticed the echo. Her footsteps were doubling, a soft *crunch-crunch* and then, half a beat behind, another *crunch*. She stopped mid-stride, and the second step came down anyway, unhurried, and then that stopped too. Rory did not turn around this time. She thought about her father, Brendan Carter, cross-examining a witness with the patient courtesy of a man laying out rope. *Establish what you know. Only what you know.* She knew that it was cold. She knew the path was real. She knew a sound had followed her, and that she had not made it. She counted to ten, then walked on, and this time she listened without pretending to be doing anything else. The echo did not come. Instead, off to the right, something moved through the trees, keeping pace with her. She caught it in the corner of her eye: a lean vertical smear of darkness, darker than the trunks, gone the moment she looked at it directly. The next time she glanced that way, it was on her left. *Deer,* she told herself. *It's Richmond Park. It's all deer.* Deer did not hum. It was faint, barely a thread of sound, but it threaded through the trees and settled at the base of her skull. A lullaby. Welsh. Her mother had sung it in the kitchen in Cardiff while the kettle ticked, a tune with no name that Rory had never heard anywhere else. Her mouth went dry. She kept walking because stopping felt like agreeing to something. The standing stones appeared without warning. One moment there was only bracken and black branches, and the next the path opened and they were simply there, a ring of ancient oaks grown so old and gnarled they had turned silver and hard as rock, each one taller than a man and leaning slightly inward like people bent to listen. Eva had told her about them. *They're not stones, technically. But try telling them that.* Rory stepped between two of them. The air changed. It thickened and warmed, and the smell of frost went out of it. In its place came green things, sap and crushed stems and honeyed pollen. The torch beam fell across wildflowers: foxgloves, cornflowers, poppies, a whole hushed carpet of them, blooming in the second week of November. The Heartstone woke against her chest. Warmth spread from it, gentle at first, then insistent, a pulse like a small animal's heartbeat. She drew it out by the chain. The crimson gem, no bigger than her thumbnail, glowed from somewhere deep inside it, and each glow throbbed a little brighter than the last. "No," she whispered. "No, no. Not here." It pulsed harder. Faint warmth, Yu-Fei's friend had said when Rory had shown it once, as a joke. *It only does that when something's close.* She hadn't asked what. The grove was empty. She swung the torch around the ring, over grass and flowers and stone-oak, and found no Eva, no bag, no sign anyone had come here in years. In the center lay a flat patch of moss, faintly depressed, as if something heavy had lain there once and left. She checked her phone. The screen read 11:42. She stared at it. She had been walking for at least fifteen minutes. She watched the display for a full slow minute, and the numbers did not change. Then the message from Eva vanished from the top of her screen. A new one took its place, and the time stamp on it read *Delivered: 11:41 PM*, though she had read it on the Tube hours ago. *Rory, where are you? I'm at your flat. Silas let me in. Are you okay??* Her thumb hovered over the screen. The signal bar had gone. The message sat there, warm and ordinary and full of typos, and it was exactly like Eva. That was the horror of it. It was the one that sounded right. Which meant the other had not been Eva at all. Behind her, very softly, someone said, "Laila." Nobody had called her that in years. It was an old name, a throwaway one, a name she had used in Cardiff to slip out of rooms and men's lives. The voice was warm and patient, pitched to carry exactly as far as her ear. She did not turn. The Heartstone burned against her palm. Around her the wildflowers had gone still, every head bowed the same way, toward the center of the ring where the moss lay pressed flat. Toward her. The humming started again, close now, from all sides at once, from between the standing trees, from the dark beyond the torch's reach. The shape at the edge of her vision stopped darting and stood, at last, quite still. Rory closed her fingers around the pendant and made herself breathe. "I know you're there," she said. It was the steadiest voice she had. "I'm not going to run." The humming stopped. In the silence that followed, she heard what she had been dreading. It was not footsteps, and not breath. It was the small, delighted sound of someone smiling.
created_at"2026-09-29T07:52:27.649Z" 9/29/2026, 7:52:27 AM
model"anthropic/claude-sonnet-5.5-20260928"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3800
moderation_latency(null)
generation_time31669
tokens_prompt792
tokens_completion1949
native_tokens_prompt1172
native_tokens_completion2973
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"
usage0.032074
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790668347-UqtoAa6FC7LrXJtBGRln"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790668347-p3f4zJzLOLdS5d5IZ6Y1"
upstream_id"msg_011CfXNHwHAZMXFuSVJWd3VT"
provider_responses
0
endpoint_id"99aaad94-923b-4fc1-b763-271ed5486f7a"
id"msg_011CfXNHwHAZMXFuSVJWd3VT"
is_byokfalse
latency658
model_permaslug"anthropic/claude-sonnet-5.5-20260928"
provider_name"Claude Platform on AWS"
status200
total_cost0.032074
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
totalTags4
adverbTagCount0
adverbTags(empty)
dialogueSentences7
tagDensity0.571
leniency1
rawRatio0
effectiveRatio0
79.69% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1231
totalAiIsmAdverbs5
found
0
adverb"quickly"
count1
1
adverb"slowly"
count1
2
adverb"slightly"
count1
3
adverb"very"
count1
4
adverb"softly"
count1
highlights
0"quickly"
1"slowly"
2"slightly"
3"very"
4"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)
55.32% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1231
totalAiIsms11
found
0
word"silence"
count2
1
word"echo"
count2
2
word"footsteps"
count2
3
word"warmth"
count2
4
word"pulse"
count1
5
word"throbbed"
count1
6
word"pulsed"
count1
highlights
0"silence"
1"echo"
2"footsteps"
3"warmth"
4"pulse"
5"throbbed"
6"pulsed"
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
narrationSentences116
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount2
hedgeCount1
narrationSentences116
filterMatches
0"know"
hedgeMatches
0"seemed to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences119
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen53
ratio0
matches(empty)
84.65% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans13
markdownWords71
totalWords1231
ratio0.058
matches
0"Grove. Come now. Please don't tell anyone."
1"hurry up, Rory"
2"you're such a snail"
3"Don't ask. Just don't go alone."
4"crunch-crunch"
5"crunch"
6"Establish what you know. Only what you know."
7"Deer,"
8"It's Richmond Park. It's all deer."
9"They're not stones, technically. But try telling them that."
10"It only does that when something's close."
11"Delivered: 11:41 PM"
12"Rory, where are you? I'm at your flat. Silas let me in. Are you okay??"
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions9
unquotedAttributions0
matches(empty)
83.33% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions41
wordCount1207
uniqueNames16
maxNameDensity0.83
worstName"Rory"
maxWindowNameDensity2.5
worstWindowName"Eva"
discoveredNames
Robin1
Hood1
Wall1
Rory10
Park2
Eva10
Tube2
Isolde1
Heartstone3
Brendan1
Carter1
Richmond2
Deer2
Cardiff2
November1
Yu-Fei1
persons
0"Robin"
1"Hood"
2"Wall"
3"Rory"
4"Eva"
5"Isolde"
6"Heartstone"
7"Brendan"
8"Carter"
9"Deer"
10"Yu-Fei"
places
0"Park"
1"Richmond"
2"Cardiff"
globalScore1
windowScore0.833
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences70
glossingSentenceCount1
matches
0"felt like agreeing to something"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1231
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount2
totalSentences119
matches
0"knew that it"
1"glanced that way"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs43
mean28.63
std20.71
cv0.723
sampleLengths
031
169
219
37
461
543
620
77
833
927
1017
1116
1221
1343
1461
1577
1610
174
1851
1914
2074
216
2251
236
2447
257
2629
2752
288
2928
3038
3115
3241
3310
347
3545
3635
372
3839
3911
4018
413
4228
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount1
totalSentences116
matches
0"was locked"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount2
totalVerbs200
matches
0"were swallowing"
1"were doubling"
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount0
semicolonCount0
flaggedSentences0
totalSentences119
ratio0
matches(empty)
98.21% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1213
adjectiveStacks0
stackExamples(empty)
adverbCount51
adverbRatio0.04204451772464963
lyAdverbCount15
lyAdverbRatio0.01236603462489695
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences119
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences119
mean10.34
std8.86
cv0.856
sampleLengths
031
17
232
330
44
51
64
710
81
92
104
114
1221
137
1429
1525
1612
172
184
197
2013
213
224
234
2424
255
262
278
2817
2910
302
314
321
338
348
352
3619
374
388
3915
4016
417
4220
434
4410
456
4614
4719
485
4914
50.56% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats12
diversityRatio0.3644067796610169
totalSentences118
uniqueOpeners43
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount4
totalSentences103
matches
0"Just don't go alone.*"
1"Only what you know.* She"
2"Instead, off to the right,"
3"Then the message from Eva"
ratio0.039
64.66% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount40
totalSentences103
matches
0"She had cut through it"
1"She checked her phone."
2"She followed the path Eva"
3"She held onto that."
4"She walked with her phone"
5"It had come from just"
6"She turned, slowly, and swept"
7"Her voice came out flat"
8"She walked on, faster."
9"Her footsteps were doubling, a"
10"She stopped mid-stride, and the"
11"She thought about her father,"
12"She knew the path was"
13"She knew a sound had"
14"She counted to ten, then"
15"She caught it in the"
16"*It's Richmond Park."
17"It's all deer.*"
18"It was faint, barely a"
19"Her mother had sung it"
ratio0.388
71.65% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount80
totalSentences103
matches
0"The gate at Robin Hood"
1"Richmond Park at night was"
2"She had cut through it"
3"She checked her phone."
4"Eva's message still sat at"
5"Eva never said please."
6"Eva said *hurry up, Rory*"
7"This message had no emoji,"
8"Rory had called four times"
9"She followed the path Eva"
10"Eva had called it Isolde's"
11"Rory zipped her jacket to"
12"She held onto that."
13"The trees closed in."
14"She walked with her phone"
15"The sound had not come"
16"It had come from just"
17"She turned, slowly, and swept"
18"A slick of frost."
19"Her voice came out flat"
ratio0.777
48.54% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences103
matches
0"Now there was only the"
ratio0.01
100.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences47
technicalSentenceCount1
matches
0"In the center lay a flat patch of moss, faintly depressed, as if something heavy had lain there once and left."
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags4
uselessAdditionCount0
matches(empty)
7.14% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags3
fancyCount1
fancyTags
0"she whispered (whisper)"
dialogueSentences7
tagDensity0.429
leniency0.857
rawRatio0.333
effectiveRatio0.286
88.1255%