Run: 2026-06-01-01KT1G65F60N0TA9K66WA603PC

Run Details

Duration:
39.4s
Cost:
$0.057375
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 standing stones came up out of the dark like teeth. Rory saw them before she understood what she was seeing — six oaks grown impossibly close, their trunks fused at the base, their crowns leaning inward as if straining to whisper to one another. The note Eva had pressed into her palm had said only this: *Richmond Park, the grove past the Pen Ponds, after moonrise. Come alone. Bring the pendant.* No signature. No explanation. Eva's handwriting, though — Rory would know those crooked Es anywhere. She'd come because she trusted Eva. She'd come because the Heartstone had begun pulsing against her sternum the moment she'd crossed the park's iron gate, a warmth that had nothing to do with the cold October night, and that frightened her more than anything Eva might have to say. Rory stopped at the threshold of the stones and listened. Richmond Park at night should not have been silent. There were deer here, hundreds of them; there were owls and foxes and the dull electric hum of the city pressing in from every side, eight million people breathing just beyond the treeline. London never truly went quiet. She had lived in it long enough to know its voice, the low grinding lullaby of buses and sirens and distant aeroplanes stitching the sky. Here, past the oaks, there was nothing. Not the wind. Not the rustle of the long grass she could see swaying — and that was the first wrong thing, because the grass was *moving*, bending in slow ripples as though a breeze passed through it, but no breeze touched her face, and no sound came with it. The grass bowed in absolute silence, like a film with the audio stripped away. The Heartstone gave another pulse. Stronger now. A live coal nestled in the hollow of her throat. "Eva?" Her voice fell out of her mouth and died at once, swallowed before it could carry. There was no echo, no return. The word simply ceased to exist. Rory pulled her jacket tighter and stepped between the stones. The temperature changed the way stepping into a cathedral changed it — a held breath, a sudden hush of stone-cooled air. But it wasn't cold. That was the thing she couldn't make sense of. It should have been October, should have been frost forming on her breath, and instead the air was soft and warm and smelled of summer: cut clover, honeysuckle, the green sweetness of meadows in June. Wildflowers crowded the clearing floor, white and gold and a violent shade of blue, blooming thick and lush and entirely out of season. They glowed faintly in the dark, or seemed to, a phosphor shimmer that made her dizzy when she looked too long. She did not like how the light here had no source. The moon hung somewhere above the leaning crowns of the oaks, but it cast no shadows. Her own feet stood in a clearing without a shadow to anchor them, and the absence of it made her stomach turn over slow and cold. *This is the grove*, she thought. *The one Eva called Isolde's.* She had thought it a story. A drunk-on-cheap-wine, three-in-the-morning kind of story, the kind Eva told when she missed home and the gin loosened the careful lock she kept on certain doors. A place between, Eva had said. An hour in there could be a minute out here. Or a year. Rory had laughed at the time. She wasn't laughing now. Something moved at the edge of her vision. She turned her head — too fast, the way you do when the animal part of you takes the wheel — and there was nothing. Only the swaying grass and the glowing flowers and the black gaps between the trees, which were darker than they had any right to be, darker than the night sky behind them, as if the spaces between the oaks were doorways into somewhere the dark was *manufactured*. "Hello?" she tried again. Useless. The grove ate the word. The pendant throbbed. Warmth bled out from it through the fabric of her shirt, spreading across her collarbones, and she found her hand had risen to press flat against it without her deciding to. Through her palm she could feel it pulse — once, twice, a heartbeat that was not her own and not quite in time with hers. The crimson stone glowed brighter than she had ever seen it, a sullen ember-light leaking between her fingers and staining the white flowers red. It pulses near a Hel portal. She did not know how she knew that. The knowing simply arrived, fully formed, the way a name surfaces from the back of the mind — as if someone had set the fact gently into her thoughts and stepped away. The certainty of it was worse than confusion would have been. Behind her, the grass whispered. Not swaying now. *Parting.* She heard it that time — the dry, deliberate sound of stalks bending aside in sequence, a line of them folding down in a path that led from the far stones toward the center of the clearing. Toward her. Something was crossing the grove, low and patient, and the silence that had swallowed her own voice did not extend to it. The grass made room with a sound like a long slow exhalation. Rory did not turn around. Every instinct she had — the same instincts that had once gotten her packed and out of Evan's flat in eleven minutes flat, the cool-headed core of her that her friends mistook for fearlessness — told her that turning around would be a mistake. That whatever moved behind her wanted her to look. That looking was a kind of invitation. She kept her eyes on the standing stones ahead, the way she'd come in, and she made herself breathe. The pendant burned. The parting grass stopped. Close. Close enough that she could feel a coolness at her back now, a pocket of true October cold opening behind her in all this false and cloying summer, breathing against the nape of her neck where her black hair lifted away from her skin. A voice spoke. It was very soft, and it was almost, almost Eva's. "You came," it said. "Good girl. Aurora. *Malphora.*" She had never told anyone that second name. She had never *heard* that second name. And the grove, at last, fell utterly still — waiting, like she was, to see what she would do.
created_at"2026-06-01T11:47:58.06Z" 6/1/2026, 11:47:58 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
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cancelledfalse
latency3104
moderation_latency(null)
generation_time39345
tokens_prompt812
tokens_completion1618
native_tokens_prompt1170
native_tokens_completion2061
native_tokens_completion_images(null)
native_tokens_reasoning58
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
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origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
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service_tier"default"
usage0.057375
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provider_responses
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is_byokfalse
latency1130
model_permaslug"anthropic/claude-4.8-opus-20260528"
provider_name"Anthropic"
status200
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Evaluation details

Result Evaluator Details Meta Data
0.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags3
adverbTagCount1
adverbTags
0"she tried again [again]"
dialogueSentences4
tagDensity0.75
leniency1
rawRatio0.333
effectiveRatio0.333
81.38% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1074
totalAiIsmAdverbs4
found
0
adverb"truly"
count1
1
adverb"gently"
count1
2
adverb"very"
count1
3
adverb"utterly"
count1
highlights
0"truly"
1"gently"
2"very"
3"utterly"
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)
34.82% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1074
totalAiIsms14
found
0
word"whisper"
count1
1
word"warmth"
count2
2
word"electric"
count1
3
word"silence"
count2
4
word"pulse"
count2
5
word"echo"
count1
6
word"sense of"
count1
7
word"stomach"
count1
8
word"throbbed"
count1
9
word"could feel"
count2
highlights
0"whisper"
1"warmth"
2"electric"
3"silence"
4"pulse"
5"echo"
6"sense of"
7"stomach"
8"throbbed"
9"could feel"
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)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount2
narrationSentences78
filterMatches(empty)
hedgeMatches
0"seemed to"
1"tend to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences79
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen47
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans8
markdownWords29
totalWords1086
ratio0.027
matches
0"Richmond Park, the grove past the Pen Ponds, after moonrise. Come alone. Bring the pendant."
1"moving"
2"This is the grove"
3"The one Eva called Isolde's."
4"manufactured"
5"Parting."
6"Malphora."
7"heard"
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions6
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions28
wordCount1078
uniqueNames12
maxNameDensity0.74
worstName"Eva"
maxWindowNameDensity2
worstWindowName"Eva"
discoveredNames
Eva8
Park2
Pen1
Ponds1
Rory6
Es1
Heartstone2
October3
June1
Useless1
Hel1
Evan1
persons
0"Eva"
1"Rory"
2"Heartstone"
3"October"
4"Evan"
places
0"Park"
1"June"
2"Hel"
globalScore1
windowScore1
57.41% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences54
glossingSentenceCount2
matches
0"as if straining to whisper to one another"
1"not quite in time with hers"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1086
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences79
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs32
mean33.94
std30.44
cv0.897
sampleLengths
011
176
249
310
472
57
664
717
829
910
10113
1153
1262
136
144
158
1672
1710
1883
1957
205
214
2273
235
2460
2519
263
2749
2813
298
3015
3119
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount0
totalSentences78
matches(empty)
83.72% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount3
totalVerbs172
matches
0"was seeing "
1"wasn't laughing"
2"was crossing"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount12
semicolonCount1
flaggedSentences11
totalSentences79
ratio0.139
matches
0"Rory saw them before she understood what she was seeing — six oaks grown impossibly close, their trunks fused at the base, their crowns leaning inward as if straining to whisper to one another."
1"Eva's handwriting, though — Rory would know those crooked Es anywhere."
2"There were deer here, hundreds of them; there were owls and foxes and the dull electric hum of the city pressing in from every side, eight million people breathing just beyond the treeline."
3"Not the rustle of the long grass she could see swaying — and that was the first wrong thing, because the grass was *moving*, bending in slow ripples as though a breeze passed through it, but no breeze touched her face, and no sound came with it."
4"The temperature changed the way stepping into a cathedral changed it — a held breath, a sudden hush of stone-cooled air."
5"She turned her head — too fast, the way you do when the animal part of you takes the wheel — and there was nothing."
6"Through her palm she could feel it pulse — once, twice, a heartbeat that was not her own and not quite in time with hers."
7"The knowing simply arrived, fully formed, the way a name surfaces from the back of the mind — as if someone had set the fact gently into her thoughts and stepped away."
8"She heard it that time — the dry, deliberate sound of stalks bending aside in sequence, a line of them folding down in a path that led from the far stones toward the center of the clearing."
9"Every instinct she had — the same instincts that had once gotten her packed and out of Evan's flat in eleven minutes flat, the cool-headed core of her that her friends mistook for fearlessness — told her that turning around would be a mistake."
10"And the grove, at last, fell utterly still — waiting, like she was, to see what she would do."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1075
adjectiveStacks0
stackExamples(empty)
adverbCount38
adverbRatio0.035348837209302326
lyAdverbCount11
lyAdverbRatio0.010232558139534883
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences79
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences79
mean13.75
std12.37
cv0.9
sampleLengths
011
134
222
32
45
52
611
76
843
910
109
1133
125
1325
147
153
1647
1714
185
192
2010
2117
226
236
2410
2521
264
279
2835
2923
3021
3111
3216
3326
346
3511
3626
376
3810
393
406
414
428
4325
4447
454
461
475
483
4931
65.40% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats10
diversityRatio0.46835443037974683
totalSentences79
uniqueOpeners37
47.62% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount1
totalSentences70
matches
0"Only the swaying grass and"
ratio0.014
100.00% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount18
totalSentences70
matches
0"She'd come because she trusted"
1"She'd come because the Heartstone"
2"She had lived in it"
3"Her voice fell out of"
4"It should have been October,"
5"They glowed faintly in the"
6"She did not like how"
7"Her own feet stood in"
8"She wasn't laughing now."
9"She turned her head —"
10"she tried again"
11"It pulses near a Hel"
12"She did not know how"
13"She heard it that time"
14"She kept her eyes on"
15"It was very soft, and"
16"She had never told anyone"
17"She had never *heard* that"
ratio0.257
52.86% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount57
totalSentences70
matches
0"The standing stones came up"
1"Rory saw them before she"
2"The note Eva had pressed"
3"Eva's handwriting, though — Rory"
4"She'd come because she trusted"
5"She'd come because the Heartstone"
6"Rory stopped at the threshold"
7"Richmond Park at night should"
8"London never truly went quiet."
9"She had lived in it"
10"Here, past the oaks, there"
11"The grass bowed in absolute"
12"The Heartstone gave another pulse."
13"A live coal nestled in"
14"Her voice fell out of"
15"The word simply ceased to"
16"Rory pulled her jacket tighter"
17"The temperature changed the way"
18"That was the thing she"
19"It should have been October,"
ratio0.814
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences70
matches(empty)
ratio0
0.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences37
technicalSentenceCount8
matches
0"Rory saw them before she understood what she was seeing — six oaks grown impossibly close, their trunks fused at the base, their crowns leaning inward as if str…"
1"She'd come because the Heartstone had begun pulsing against her sternum the moment she'd crossed the park's iron gate, a warmth that had nothing to do with the …"
2"Not the rustle of the long grass she could see swaying — and that was the first wrong thing, because the grass was *moving*, bending in slow ripples as though a…"
3"Only the swaying grass and the glowing flowers and the black gaps between the trees, which were darker than they had any right to be, darker than the night sky …"
4"Warmth bled out from it through the fabric of her shirt, spreading across her collarbones, and she found her hand had risen to press flat against it without her…"
5"She heard it that time — the dry, deliberate sound of stalks bending aside in sequence, a line of them folding down in a path that led from the far stones towar…"
6"Something was crossing the grove, low and patient, and the silence that had swallowed her own voice did not extend to it."
7"Every instinct she had — the same instincts that had once gotten her packed and out of Evan's flat in eleven minutes flat, the cool-headed core of her that her …"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags3
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags1
fancyCount0
fancyTags(empty)
dialogueSentences4
tagDensity0.25
leniency0.5
rawRatio0
effectiveRatio0
77.4402%