Run: 2026-05-31-01KSYXB409W48DMRKZDMZXR605

Run Details

Duration:
38.5s
Cost:
$0.059650
Provider:
Anthropic

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 wildflowers should not have been blooming. Rory noticed it the moment she stepped past the standing stones — those ancient oaks bent like old men into a ring, their bark grey as bone in the moonlight. Beyond them, the Grove opened into a clearing of impossible color: bluebells, foxgloves, ragged-robin, all of it lush and trembling though London had been locked in February frost not five minutes' walk behind her. The air here was warm. Soft. It smelled of crushed green and something sweeter underneath, something she couldn't name and didn't like. Eva had told her the place was safe. *Just go to the Grove. Wait by the third stone. He'll find you.* Eva had a habit of saying things like that as though they made sense, as though it were perfectly ordinary to send your best friend into a hidden clearing in the middle of Richmond Park at midnight to meet a man she'd never named. Rory pulled her coat tighter, though she wasn't cold. Old habit. Armor. "Hello?" Her voice came out smaller than she wanted, and the Grove seemed to swallow it whole. No echo. No answer. Just the faint hush of wind through grass that did not quite move. She found the third stone — taller than the others, leaning at a drunken angle, its surface carved with spirals worn nearly smooth — and she stood beside it and waited. The moon hung overhead, too large, too bright. She was certain it had been a sliver of a thing when she'd left the flat above Silas's bar. A waxing crescent, thin as a fingernail clipping. Now it sat fat and full and yellow as a cataract, and she did not remember it changing. *Time moves differently here.* That was the other thing Eva had said. Rory had thought it a figure of speech. She checked her phone. No signal, and the clock read 00:00 — not midnight, just zeros, four of them blinking patiently at her like something waiting to be fed. She turned it off and shoved it deep into her pocket. That was when she heard the first sound that shouldn't have been there. A child, laughing. It came from her left, somewhere beyond the tree line where the flowers gave way to darkness, and it was bright and delighted and absolutely wrong — the sound of a small child playing alone at midnight in a place no child could be. It rose, peaked, broke off mid-breath. Then silence, thick and total. Rory's heart slammed against her ribs. She kept very still. *Cool head*, she told herself. *Out-of-the-box. Think.* But there was no clever angle here, no problem to solve, only the cold certainty crawling up her spine that the laughter had not been for her. It had been *about* her. "Eva sent me," she said to the dark. Loud, this time. "I'm here to meet someone." The wildflowers nearest her bent in unison, all of them, leaning toward her as if pulled by a tide. There was no wind. She backed against the stone. Its surface was warm, unnervingly so, like skin, and she jerked away from it and stood with nothing at her back but open air, which was worse. The pendant stirred. She'd nearly forgotten it — the Heartstone, the gift from a benefactor she'd never met, a thumbnail of deep crimson glass on a fine silver chain that she'd taken to wearing because Eva had insisted and because, in some small superstitious corner of herself, she'd wanted to believe it meant something. Now it pulsed against her sternum, a slow throb of heat, like a second heartbeat keeping time with her own and then, horribly, beginning to outpace it. Warmer. Faster. The crimson at its heart kindled to a glow she could see through the weave of her shirt, a dull red coal pressed to her chest. *It pulses near a Hel portal.* Eva had told her that too, laughing, the way you'd describe a parlor trick. Rory hadn't asked what a Hel portal was. She had not wanted to know. She still didn't, but the knowing was coming for her regardless, rising from the dark beyond the trees the way the moon had risen — too fast, too full, too wrong. Movement, at the edge of her vision. She turned her head and there was nothing — only the swaying flowers, the patient oaks. But she'd seen it. A shape. Tall and thin and pale, standing among the trees where no shape had been a moment before, gone the instant she looked at it directly. The afterimage burned behind her eyes: a figure with its head tilted at an angle a neck should not allow, watching. The laughter came again. Closer now. From her right. Then a second laugh joined it, lower, an adult's voice mimicking the child's joy with none of its warmth, and a third from behind her, and a fourth, until the Grove rang with delight on every side, a chorus of pleasure that had nothing human at its center. The flowers thrashed. The warm air went cold all at once, and the sweet smell beneath the green resolved at last into what it had always been — meat, left too long, gone soft and dark. The pendant seared her skin. She clutched it through her shirt and felt it scald her palm and did not let go. "I changed my mind," she whispered. "I'm leaving." She turned for the standing stones, for the gap she'd come through, and her stomach dropped. The ring of oaks had closed. Where there had been a path, a way back into the cold ordinary park and the cold ordinary world, there was now only an unbroken wall of grey trunks, shoulder to shoulder, their carved spirals catching the bloated moonlight. She counted them. Twelve. There had been eleven. She was certain there had been eleven, certain the way she was certain of her own name, and the twelfth stood exactly where she had entered, taller than the rest, leaning at a drunken angle, watching her with a patience older than the city. Behind her, very softly, something began to walk through the flowers. Rory did not turn around. She fixed her eyes on the twelfth stone, on the dark seam beside it where the path had been, and she made herself breathe, and she made herself think, and the footsteps in the grass came closer, unhurried, and the laughter died away into a silence that listened. A voice spoke, just behind her shoulder. Warm. Pleased. Familiar in a way that turned her blood to ice. "There you are," it said. "We've been waiting."
created_at"2026-05-31T11:40:08.596Z" 5/31/2026, 11:40:08 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2805
moderation_latency(null)
generation_time38412
tokens_prompt812
tokens_completion1650
native_tokens_prompt1170
native_tokens_completion2152
native_tokens_completion_images(null)
native_tokens_reasoning55
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"
usage0.05965
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provider_responses
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endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01TGc8pHv6S7SLYxqptqm64K"
is_byokfalse
latency1215
model_permaslug"anthropic/claude-4.8-opus-20260528"
provider_name"Anthropic"
status200
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api_type"completions"
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upstream_id"msg_01TGc8pHv6S7SLYxqptqm64K"
total_cost0.05965
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provider_name"Anthropic"
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Evaluation details

Result Evaluator Details Meta Data
100.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags5
adverbTagCount0
adverbTags(empty)
dialogueSentences7
tagDensity0.714
leniency1
rawRatio0
effectiveRatio0
81.92% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1106
totalAiIsmAdverbs4
found
0
adverb"perfectly"
count1
1
adverb"very"
count2
2
adverb"softly"
count1
highlights
0"perfectly"
1"very"
2"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)
50.27% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1106
totalAiIsms11
found
0
word"echo"
count1
1
word"absolutely"
count1
2
word"silence"
count2
3
word"pulsed"
count1
4
word"throb"
count1
5
word"warmth"
count1
6
word"resolved"
count1
7
word"stomach"
count1
8
word"footsteps"
count1
9
word"familiar"
count1
highlights
0"echo"
1"absolutely"
2"silence"
3"pulsed"
4"throb"
5"warmth"
6"resolved"
7"stomach"
8"footsteps"
9"familiar"
100.00% Cliché density
Target: ≤1 cliche(s) per 800-word window
totalCliches1
maxInWindow1
found
0
label"stomach dropped/sank"
count1
highlights
0"stomach dropped"
100.00% Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells1
narrationSentences84
matches
0"g with delight"
91.84% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount1
hedgeCount2
narrationSentences84
filterMatches
0"think"
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)
analyzedSentences87
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen50
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans6
markdownWords28
totalWords1115
ratio0.025
matches
0"Just go to the Grove. Wait by the third stone. He'll find you."
1"Time moves differently here."
2"Cool head"
3"Out-of-the-box. Think."
4"about"
5"It pulses near a Hel portal."
89.29% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions7
unquotedAttributions1
matches
0"*Cool head*, she told herself."
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions24
wordCount1090
uniqueNames11
maxNameDensity0.55
worstName"Rory"
maxWindowNameDensity1.5
worstWindowName"Grove"
discoveredNames
Grove4
London1
February1
Eva5
Richmond1
Park1
Silas1
Loud1
Heartstone1
Hel2
Rory6
persons
0"Grove"
1"Eva"
2"Silas"
3"Rory"
places
0"London"
1"February"
2"Richmond"
3"Park"
4"Hel"
globalScore1
windowScore1
96.81% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences47
glossingSentenceCount1
matches
0"not quite move"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1115
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences87
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs33
mean33.79
std26.89
cv0.796
sampleLengths
07
186
265
312
434
531
653
720
840
913
103
1155
1249
1316
1423
1532
163
1778
1828
1965
207
2168
229
2384
2422
258
2616
276
2891
2911
3053
3119
328
92.73% Passive voice overuse
Target: ≤2% passive sentences
passiveCount3
totalSentences84
matches
0"been locked"
1"been eleven"
2"been eleven"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount1
totalVerbs175
matches
0"was coming"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount9
semicolonCount0
flaggedSentences8
totalSentences87
ratio0.092
matches
0"Rory noticed it the moment she stepped past the standing stones — those ancient oaks bent like old men into a ring, their bark grey as bone in the moonlight."
1"She found the third stone — taller than the others, leaning at a drunken angle, its surface carved with spirals worn nearly smooth — and she stood beside it and waited."
2"No signal, and the clock read 00:00 — not midnight, just zeros, four of them blinking patiently at her like something waiting to be fed."
3"It came from her left, somewhere beyond the tree line where the flowers gave way to darkness, and it was bright and delighted and absolutely wrong — the sound of a small child playing alone at midnight in a place no child could be."
4"She'd nearly forgotten it — the Heartstone, the gift from a benefactor she'd never met, a thumbnail of deep crimson glass on a fine silver chain that she'd taken to wearing because Eva had insisted and because, in some small superstitious corner of herself, she'd wanted to believe it meant something."
5"She still didn't, but the knowing was coming for her regardless, rising from the dark beyond the trees the way the moon had risen — too fast, too full, too wrong."
6"She turned her head and there was nothing — only the swaying flowers, the patient oaks."
7"The warm air went cold all at once, and the sweet smell beneath the green resolved at last into what it had always been — meat, left too long, gone soft and dark."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount75
adjectiveStacks0
stackExamples(empty)
adverbCount0
adverbRatio0
lyAdverbCount0
lyAdverbRatio0
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences87
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences87
mean12.82
std13.16
cv1.027
sampleLengths
07
130
234
35
41
516
68
75
85
947
109
112
121
1317
142
152
1613
1731
188
1919
208
2118
2212
238
244
2525
2611
2713
283
2944
306
315
326
334
345
351
3628
375
388
393
405
4119
424
435
4427
453
4651
4727
481
491
68.58% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats7
diversityRatio0.45977011494252873
totalSentences87
uniqueOpeners40
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount4
totalSentences69
matches
0"*Just go to the Grove."
1"Just the faint hush of"
2"Then silence, thick and total."
3"Then a second laugh joined"
ratio0.058
80.87% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount24
totalSentences69
matches
0"It smelled of crushed green"
1"He'll find you.* Eva had"
2"Her voice came out smaller"
3"She found the third stone"
4"She was certain it had"
5"She checked her phone."
6"She turned it off and"
7"It came from her left,"
8"It rose, peaked, broke off"
9"She kept very still."
10"It had been *about* her."
11"she said to the dark"
12"She backed against the stone."
13"Its surface was warm, unnervingly"
14"She'd nearly forgotten it —"
15"*It pulses near a Hel"
16"She had not wanted to"
17"She still didn't, but the"
18"She turned her head and"
19"She clutched it through her"
ratio0.348
100.00% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount49
totalSentences69
matches
0"The wildflowers should not have"
1"Rory noticed it the moment"
2"The air here was warm."
3"It smelled of crushed green"
4"Eva had told her the"
5"He'll find you.* Eva had"
6"Rory pulled her coat tighter,"
7"Her voice came out smaller"
8"She found the third stone"
9"The moon hung overhead, too"
10"She was certain it had"
11"A waxing crescent, thin as"
12"Rory had thought it a"
13"She checked her phone."
14"She turned it off and"
15"That was when she heard"
16"A child, laughing."
17"It came from her left,"
18"It rose, peaked, broke off"
19"Rory's heart slammed against her"
ratio0.71
100.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount2
totalSentences69
matches
0"Now it sat fat and"
1"Now it pulsed against her"
ratio0.029
31.25% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences32
technicalSentenceCount5
matches
0"He'll find you.* Eva had a habit of saying things like that as though they made sense, as though it were perfectly ordinary to send your best friend into a hidd…"
1"The wildflowers nearest her bent in unison, all of them, leaning toward her as if pulled by a tide."
2"Its surface was warm, unnervingly so, like skin, and she jerked away from it and stood with nothing at her back but open air, which was worse."
3"Then a second laugh joined it, lower, an adult's voice mimicking the child's joy with none of its warmth, and a third from behind her, and a fourth, until the G…"
4"She fixed her eyes on the twelfth stone, on the dark seam beside it where the path had been, and she made herself breathe, and she made herself think, and the f…"
25.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags5
uselessAdditionCount1
matches
0"Her voice came out, and the Grove seemed to swallow it whole"
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
83.8565%