Run: 2026-05-29-01KSSK43AVAER6JZZ1NX9X5R4M

Run Details

Duration:
38.6s
Cost:
$0.057625
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 directions Eva had given her ended at the line of oaks, and Rory stood there for a long moment, deciding whether she truly meant to step past them. Richmond Park at this hour was a country of shadows. She'd left the car on a verge two miles back, where the road dwindled into a rutted track, and walked the rest by the light of her phone until the battery had dropped to a sullen red sliver and she'd switched it off to save what was left. Now there was only the moon, three-quarters full and high, laying a thin silver wash over the grass. The deer were somewhere out in the dark; she'd heard them earlier, the soft thud of hooves, a bark that carried strange and hollow across the open ground. She heard nothing of them now. The oaks rose ahead of her in a rough ring, eight or nine of them, far older than any tree she'd seen in the park by daylight. Their trunks were thick as cottage walls and split with age, and they stood too evenly spaced to be an accident of seeding. Standing stones, Eva had called them, though they were wood and not stone. Mark the boundary, she'd said, and wouldn't say of what. Rory came for answers. That was the reason she held on to, the one she repeated to herself as she crossed the last few yards of ordinary grass. Three weeks of half-glimpsed things and dreams that left her waking with her heart slamming, and the pendant — she pressed her palm flat against her sternum, where it hung beneath her jacket — the pendant that had started all of it. Eva swore the Grove held what she needed. So she stepped between two of the oaks. The change was immediate, and it was the silence that struck her first. Outside the ring, the night had its own quiet busyness: wind moving the high grass, the distant grumble of a city that never fully slept, the small clicks and rustles of living things. Inside, all of that fell away as cleanly as if she had walked into a sealed room. Her own footsteps went soft and muffled. The air was warmer here, and it carried the heavy sweetness of flowers — and that was wrong too, because it was late autumn, and yet the clearing before her was thick with blossom. Wildflowers crowded the grass in pale clusters, foxglove and cornflower and others she had no name for, all of them glowing faintly in the moonlight, all of them in full summer bloom. "Right," she said aloud, just to hear a voice. The word landed flat, swallowed before it could echo. "Right." She walked forward into the clearing. The flowers brushed her shins, releasing more of that cloying scent with every step, and she found she was holding her breath against it without quite knowing why. The pendant lay cool against her skin. She'd half hoped it would do something — warm, pulse, give her a sign that she'd come to the right place. It did nothing at all, and somehow that was worse. She was perhaps twenty paces in when she heard the laugh. It was light and bright and very brief, a child's laugh, coming from the trees on her left. Rory turned toward it. The oaks stood black and still. Nothing moved between them. "Hello?" Her own voice was unsteady now. "Eva? Is someone there?" No answer. She told herself it had been a fox — they could sound like that, like babies crying, like people, everyone knew that. She told herself this firmly and did not believe it, because the laugh had been a laugh, joyful and knowing, and a fox did not laugh as if it had seen something funny that you had not yet noticed. She kept walking. She didn't decide to; her feet simply carried her on, deeper toward the centre of the clearing where the grass thinned into a worn circle of bare earth. And as she went, she became aware that the quality of the dark had changed. The moon still hung above her, but its light seemed to be reaching her from further away now, dimmer, as though she were looking up through water. The flowers had lost their glow. The treeline, when she glanced back, looked further off than the distance she'd walked. Something moved at the edge of her vision. She snapped her head round and it was gone — but she'd seen it, a shape low and quick, pale, darting between two of the oaks. Her breath came short. She turned a slow circle, scanning the ring of trees, and now they were everywhere and nowhere, these movements: a flicker to her right, a stirring of grass to her left that the still air could not explain, the suggestion of a face that dissolved the moment her eyes found it. "Stop it," she whispered. "Whatever you are. Stop it." The laughter came again, and this time it was not one voice but several, soft and overlapping, rising up all around her in a delighted murmur that prickled the hairs along her arms. It was the sound of people very pleased that she had finally arrived. The sound of guests waiting for the party to begin. That was when the pendant moved. She felt it first as heat — a sudden bloom of warmth against her breastbone, sharp enough that she gasped and pressed her hand to it through her jacket. It was pulsing. She could feel the rhythm of it through the fabric, a steady throb like a second heartbeat, quickening. She dragged the chain out from her collar. The Heartstone hung from her fist, and its crimson stone was no longer faintly aglow but burning, an angry coal-red light that threw the shadows of her fingers across her face. Warmth when near a Hel portal. The words surfaced from somewhere — the note that had come with the thing, in handwriting she didn't recognise. She had read them and thought them nonsense. The murmuring stopped. In the absolute silence that followed, Rory understood, with a cold and total certainty that had nothing to do with reason, that she was being looked at. Not glimpsed at the edges of things, not teased — looked at, full and steady, by something directly ahead of her in the dark beyond the bare circle of earth. She did not want to raise her eyes. Every animal part of her urged her to keep them down, to be still, to be small. The pendant blazed in her hand, hot now, almost too hot to hold. She raised her eyes. The clearing stretched away from her, empty and silver and wrong, and at its far edge the air had begun, very slowly, to open.
created_at"2026-05-29T10:05:20.612Z" 5/29/2026, 10:05:20 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2996
moderation_latency(null)
generation_time38534
tokens_prompt812
tokens_completion1646
native_tokens_prompt1170
native_tokens_completion2071
native_tokens_completion_images(null)
native_tokens_reasoning54
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"
usage0.057625
router(null)
provider_responses
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endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01UgR512SX3DXD4MH7aSdou9"
is_byokfalse
latency1543
model_permaslug"anthropic/claude-4.8-opus-20260528"
provider_name"Anthropic"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.16.0; linux; x64))"
http_referer(null)
request_id"req-1780049120-NSK9w8WBPnGgcI1swF23"
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api_type"completions"
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upstream_id"msg_01UgR512SX3DXD4MH7aSdou9"
total_cost0.057625
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
0.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags2
adverbTagCount1
adverbTags
0"she said aloud [aloud]"
dialogueSentences6
tagDensity0.333
leniency0.667
rawRatio0.5
effectiveRatio0.333
77.95% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1134
totalAiIsmAdverbs5
found
0
adverb"truly"
count1
1
adverb"very"
count3
2
adverb"slowly"
count1
highlights
0"truly"
1"very"
2"slowly"
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)
47.09% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1134
totalAiIsms12
found
0
word"silence"
count2
1
word"footsteps"
count1
2
word"echo"
count1
3
word"pulse"
count1
4
word"firmly"
count1
5
word"scanning"
count1
6
word"flicker"
count1
7
word"warmth"
count2
8
word"could feel"
count1
9
word"throb"
count1
highlights
0"silence"
1"footsteps"
2"echo"
3"pulse"
4"firmly"
5"scanning"
6"flicker"
7"warmth"
8"could feel"
9"throb"
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
narrationSentences68
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount1
narrationSentences68
filterMatches(empty)
hedgeMatches
0"seemed 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
maxSentenceWordsSeen51
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1143
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
totalMentions11
wordCount1129
uniqueNames6
maxNameDensity0.35
worstName"Rory"
maxWindowNameDensity1
worstWindowName"Eva"
discoveredNames
Eva3
Rory4
Park1
Grove1
Heartstone1
Hel1
persons
0"Eva"
1"Rory"
2"Grove"
3"Heartstone"
places
0"Park"
1"Hel"
globalScore1
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences58
glossingSentenceCount0
matches(empty)
25.02% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches2
per1kWords1.75
wordCount1143
matches
0"not one voice but several, soft"
1"no longer faintly aglow but"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences71
matches
0"left that the"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs25
mean45.72
std37.16
cv0.813
sampleLengths
029
1110
273
386
413
5123
619
772
811
932
1011
1163
1293
138
1481
159
1656
176
1889
1933
203
2182
2213
234
2424
94.94% Passive voice overuse
Target: ≤2% passive sentences
passiveCount2
totalSentences68
matches
0"was gone "
1"being looked"
91.89% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount3
totalVerbs185
matches
0"was holding"
1"were looking"
2"was pulsing"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount9
semicolonCount2
flaggedSentences10
totalSentences71
ratio0.141
matches
0"The deer were somewhere out in the dark; she'd heard them earlier, the soft thud of hooves, a bark that carried strange and hollow across the open ground."
1"Three weeks of half-glimpsed things and dreams that left her waking with her heart slamming, and the pendant — she pressed her palm flat against her sternum, where it hung beneath her jacket — the pendant that had started all of it."
2"The air was warmer here, and it carried the heavy sweetness of flowers — and that was wrong too, because it was late autumn, and yet the clearing before her was thick with blossom."
3"She'd half hoped it would do something — warm, pulse, give her a sign that she'd come to the right place."
4"She told herself it had been a fox — they could sound like that, like babies crying, like people, everyone knew that."
5"She didn't decide to; her feet simply carried her on, deeper toward the centre of the clearing where the grass thinned into a worn circle of bare earth."
6"She snapped her head round and it was gone — but she'd seen it, a shape low and quick, pale, darting between two of the oaks."
7"She felt it first as heat — a sudden bloom of warmth against her breastbone, sharp enough that she gasped and pressed her hand to it through her jacket."
8"The words surfaced from somewhere — the note that had come with the thing, in handwriting she didn't recognise."
9"Not glimpsed at the edges of things, not teased — looked at, full and steady, by something directly ahead of her in the dark beyond the bare circle of earth."
88.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1123
adjectiveStacks2
stackExamples
0"lay cool against her"
1"angry coal-red light"
adverbCount42
adverbRatio0.037399821905609976
lyAdverbCount12
lyAdverbRatio0.01068566340160285
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
mean16.1
std11.94
cv0.742
sampleLengths
029
110
248
318
428
56
627
723
813
910
104
1124
1242
138
148
1513
1633
1717
187
1934
2032
219
229
231
246
2528
267
2721
2810
2911
3018
314
326
334
347
354
362
3722
3839
393
4028
4115
4227
436
4414
458
4626
474
4851
494
58.22% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats7
diversityRatio0.4084507042253521
totalSentences71
uniqueOpeners29
0.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount0
totalSentences66
matches(empty)
ratio0
62.42% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount26
totalSentences66
matches
0"She'd left the car on"
1"She heard nothing of them"
2"Their trunks were thick as"
3"Her own footsteps went soft"
4"she said aloud, just to"
5"She walked forward into the"
6"She'd half hoped it would"
7"It did nothing at all,"
8"She was perhaps twenty paces"
9"It was light and bright"
10"Her own voice was unsteady"
11"She told herself it had"
12"She told herself this firmly"
13"She kept walking."
14"She didn't decide to; her"
15"She snapped her head round"
16"Her breath came short."
17"She turned a slow circle,"
18"It was the sound of"
19"She felt it first as"
ratio0.394
35.76% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount56
totalSentences66
matches
0"The directions Eva had given"
1"Richmond Park at this hour"
2"She'd left the car on"
3"The deer were somewhere out"
4"She heard nothing of them"
5"The oaks rose ahead of"
6"Their trunks were thick as"
7"Rory came for answers."
8"That was the reason she"
9"Eva swore the Grove held"
10"The change was immediate, and"
11"Her own footsteps went soft"
12"The air was warmer here,"
13"Wildflowers crowded the grass in"
14"she said aloud, just to"
15"The word landed flat, swallowed"
16"She walked forward into the"
17"The flowers brushed her shins,"
18"The pendant lay cool against"
19"She'd half hoped it would"
ratio0.848
75.76% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences66
matches
0"Now there was only the"
ratio0.015
0.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences41
technicalSentenceCount9
matches
0"The deer were somewhere out in the dark; she'd heard them earlier, the soft thud of hooves, a bark that carried strange and hollow across the open ground."
1"Three weeks of half-glimpsed things and dreams that left her waking with her heart slamming, and the pendant — she pressed her palm flat against her sternum, wh…"
2"The flowers brushed her shins, releasing more of that cloying scent with every step, and she found she was holding her breath against it without quite knowing w…"
3"She told herself this firmly and did not believe it, because the laugh had been a laugh, joyful and knowing, and a fox did not laugh as if it had seen something…"
4"She turned a slow circle, scanning the ring of trees, and now they were everywhere and nowhere, these movements: a flicker to her right, a stirring of grass to …"
5"The laughter came again, and this time it was not one voice but several, soft and overlapping, rising up all around her in a delighted murmur that prickled the …"
6"The Heartstone hung from her fist, and its crimson stone was no longer faintly aglow but burning, an angry coal-red light that threw the shadows of her fingers …"
7"The words surfaced from somewhere — the note that had come with the thing, in handwriting she didn't recognise."
8"In the absolute silence that followed, Rory understood, with a cold and total certainty that had nothing to do with reason, that she was being looked at."
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags2
uselessAdditionCount0
matches(empty)
0.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags2
fancyCount1
fancyTags
0"she whispered (whisper)"
dialogueSentences6
tagDensity0.333
leniency0.667
rawRatio0.5
effectiveRatio0.333
71.9019%