Run: 2026-10-08-01M4DAFKA39K05KBDPWWJ5VBKA

Run Details

Duration:
15.8s
Cost:
$0.001243
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 Gate had been padlocked, but the fence beside it sagged where the wire had rusted through, and Rory had slipped through it with the careful patience she usually reserved for other people's doors. Now she stood on the damp grass with the city's orange haze fading behind the oaks, and the park was so quiet she could hear her own pulse. She checked her phone. 11:52. The screen's glow made the trees look like cut paper. She had told Silas she was going for a walk, which was a lie he would not believe and would not question, because he never asked her where she went at night. She had not told Eva anything at all. The directions had come in a plain envelope slid under her door three days ago, with no stamp and no return address. *Come to the grove before the bells. Bring nothing you cannot carry.* Under it, a single line in handwriting she didn't recognise: *The stone that was not there will be there.* She had almost burned it. Instead she had put it in her coat pocket, and it had lived there ever since, next to the thin silver chain she had never been able to make herself take off. The pendant lay against her breastbone under her shirt. For the first hour of her walk it had been cold, a dead weight of metal. Somewhere past the Isabella Plantation it had begun to warm, slowly, the way a stone warms in the sun. Now it was almost hot, and she could feel a faint regular throb through the skin, like a second heartbeat slightly out of step with her own. *Near a Hel portal*, she thought, and then wished she hadn't, because thinking the word made the air feel thinner. She walked on. The path bent through bracken that should have been brown and brittle this late in the year, but it was green, lush, rising to her knees. The smell reached her before anything else did: honey and crushed grass and something sweeter underneath, like lilies left too long in a vase. Wildflowers pushed up between the roots. Foxgloves, clover, a pale blue thing she didn't have a name for. Ten feet off the path, a patch of them was open, petals turned toward her, as if they had been waiting. She stopped. Somewhere ahead, a bell rang. Once. Thin and clear, not from any church she knew of. Rory pressed her lips together and kept walking. The standing stones came into view at the crest of a low rise, a ring of them, black with age and furred with moss. The oaks behind them were enormous, their trunks twisted into shapes that looked almost like they had been grown on purpose. Between the stones the grass was flattened in a wide circle, and in the centre of the circle the wildflowers grew so thickly that the ground was a sea of colour under the moon. She counted the stones from habit. Eleven. She had seen the photographs online, the ones people posted with shaky captions about the place they had found by accident. Every one of them had said there were twelve. *The stone that was not there will be there.* She stepped between the first two stones, and the silence changed. It did not deepen. It shifted, the way the air in a room shifts when someone has just stopped speaking in the next room. The pendant burned against her skin. She put her hand over it through her shirt. Something moved at the edge of her vision, beyond the eastern stones. She turned her head, quick and deliberate, and found only trees, their trunks silver-grey where the moon touched them. No movement now. No sound. She waited, breathing slowly through her nose, the way she had learned to wait in rooms with Evan, when the wrong step on the stairs meant the whole evening would turn. Nothing. Then, from the same direction, a soft sound, like a fingernail drawn lightly over cloth. "Hello?" Her voice came out steadier than she felt. It sounded small in the ring of stones, swallowed almost at once by the grass. No answer. But the wildflowers nearest the eastern trees were bending. Not swaying in a breeze. Bending, one after another in a slow line, as if something had passed through them and was still passing, moving carefully so as not to be seen. She looked down. The dew on the grass inside the circle was disturbed. Faint prints led from the eastern trees toward her, narrow and bare, the toes spread wide. They stopped about six feet away. Rory did not move. Her eyes went to the ground behind her, to her own boots pressed into the damp earth, and she saw that there were no prints leading away from the circle. Only the ones that led to her. Then, very faintly, from somewhere beyond the oaks, a voice began to sing. It was a child's voice, or perhaps a woman's pitched high enough to sound like one. The tune was familiar. It was the lullaby her mother used to hum while she ironed in the kitchen in Cardiff, the one with no words that Rory had never been able to remember properly. She knew, with a clarity that felt almost calm, that she should not answer. She knew, too, that she had come here to find out what had sent that envelope, and that whatever was singing had been waiting for her to arrive. The pendant pulsed against her chest, steady and warm, like a hand pressed flat to her heart. She took out her phone. The screen showed 11:52. She looked up. The stones had not changed. But when she counted them again, moving her lips, she found twelve.
created_at"2026-10-08T08:36:07.115Z" 10/8/2026, 8:36:07 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency15799
moderation_latency(null)
generation_time15799
tokens_prompt792
tokens_completion1337
native_tokens_prompt1172
native_tokens_completion2252
native_tokens_completion_images(null)
native_tokens_reasoning543
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"
usage0.0012432
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448567-qP0Vf6DsTZGAXfAHeTfm"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448567-1uJObIEkB1lOvmhDAMQy"
upstream_id"msg_011CfpTuHcQfR4vLPZLg5CZW"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpTuHcQfR4vLPZLg5CZW"
is_byokfalse
latency991
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0012432
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)
dialogueSentences1
tagDensity1
leniency1
rawRatio0
effectiveRatio0
69.17% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount973
totalAiIsmAdverbs6
found
0
adverb"slowly"
count2
1
adverb"slightly"
count1
2
adverb"lightly"
count1
3
adverb"carefully"
count1
4
adverb"very"
count1
highlights
0"slowly"
1"slightly"
2"lightly"
3"carefully"
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)
64.03% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount973
totalAiIsms7
found
0
word"pulse"
count1
1
word"weight"
count1
2
word"could feel"
count1
3
word"throb"
count1
4
word"silence"
count1
5
word"familiar"
count1
6
word"pulsed"
count1
highlights
0"pulse"
1"weight"
2"could feel"
3"throb"
4"silence"
5"familiar"
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
narrationSentences73
matches(empty)
84.15% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount2
hedgeCount1
narrationSentences73
filterMatches
0"look"
1"feel"
hedgeMatches
0"began to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences73
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen38
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans4
markdownWords34
totalWords973
ratio0.035
matches
0"Come to the grove before the bells. Bring nothing you cannot carry."
1"The stone that was not there will be there."
2"Near a Hel portal"
3"The stone that was not there will be there."
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions0
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions14
wordCount972
uniqueNames11
maxNameDensity0.41
worstName"Rory"
maxWindowNameDensity1
worstWindowName"Rory"
discoveredNames
Robin1
Hood1
Gate1
Rory4
Silas1
Eva1
Isabella1
Plantation1
Hel1
Evan1
Cardiff1
persons
0"Robin"
1"Hood"
2"Gate"
3"Rory"
4"Silas"
5"Eva"
6"Evan"
places
0"Isabella"
1"Plantation"
2"Hel"
3"Cardiff"
globalScore1
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences52
glossingSentenceCount0
matches(empty)
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount973
matches(empty)
75.34% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount2
totalSentences73
matches
0"calm, that she"
1"sent that envelope"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs25
mean38.92
std24.65
cv0.633
sampleLengths
066
155
253
337
471
520
692
72
816
98
1079
1137
129
1335
1415
1567
1616
1724
1843
1935
2041
2164
2259
239
2420
90.84% Passive voice overuse
Target: ≤2% passive sentences
passiveCount3
totalSentences73
matches
0"been padlocked"
1"been grown"
2"was flattened"
26.84% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount4
totalVerbs154
matches
0"was going"
1"were bending"
2"was still passing"
3"was singing"
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount0
semicolonCount0
flaggedSentences0
totalSentences73
ratio0
matches(empty)
97.23% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount973
adjectiveStacks0
stackExamples(empty)
adverbCount42
adverbRatio0.04316546762589928
lyAdverbCount11
lyAdverbRatio0.011305241521068859
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences73
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences73
mean13.33
std9.86
cv0.74
sampleLengths
038
128
24
31
410
532
68
722
87
924
105
1132
129
1316
1419
1527
1620
173
1826
1924
206
2112
2221
232
245
251
2610
278
2824
2921
3034
316
321
3321
349
359
3611
374
3820
396
409
4112
4219
433
442
4531
461
4715
489
4915
63.43% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats6
diversityRatio0.4305555555555556
totalSentences72
uniqueOpeners31
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount6
totalSentences66
matches
0"Instead she had put it"
1"Somewhere past the Isabella Plantation"
2"Somewhere ahead, a bell rang."
3"Then, from the same direction,"
4"Only the ones that led"
5"Then, very faintly, from somewhere"
ratio0.091
74.55% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount24
totalSentences66
matches
0"She checked her phone."
1"She had told Silas she"
2"She had not told Eva"
3"She had almost burned it."
4"She walked on."
5"She counted the stones from"
6"She had seen the photographs"
7"She stepped between the first"
8"It did not deepen."
9"It shifted, the way the"
10"She put her hand over"
11"She turned her head, quick"
12"She waited, breathing slowly through"
13"Her voice came out steadier"
14"It sounded small in the"
15"She looked down."
16"They stopped about six feet"
17"Her eyes went to the"
18"It was a child's voice,"
19"It was the lullaby her"
ratio0.364
100.00% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount45
totalSentences66
matches
0"The gate at Robin Hood"
1"She checked her phone."
2"The screen's glow made the"
3"She had told Silas she"
4"She had not told Eva"
5"The directions had come in"
6"She had almost burned it."
7"The pendant lay against her"
8"She walked on."
9"The path bent through bracken"
10"The smell reached her before"
11"Wildflowers pushed up between the"
12"Foxgloves, clover, a pale blue"
13"Rory pressed her lips together"
14"The standing stones came into"
15"The oaks behind them were"
16"She counted the stones from"
17"She had seen the photographs"
18"Every one of them had"
19"*The stone that was not"
ratio0.682
100.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount2
totalSentences66
matches
0"Now she stood on the"
1"Now it was almost hot,"
ratio0.03
100.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences38
technicalSentenceCount2
matches
0"Bring nothing you cannot carry.* Under it, a single line in handwriting she didn't recognise: *The stone that was not there will be there.*"
1"Bending, one after another in a slow line, as if something had passed through them and was still passing, moving carefully so as not to be seen."
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
91.5191%