Run: 2026-02-24-01KJ8X3225K0M50X5W1991HNMG

Run Details

Duration:
1m
Cost:
$0.037728
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 were wrong. Rory knew it the moment she ducked through the gap in the standing stones, the ancient oaks pressing close on either side like sentinels deciding whether to let her pass. She had been to the grove a dozen times now, enough to trust the familiar drop in temperature at the boundary, the way the air here smelled of loam and something older — green and mineral and faintly electric. She knew what to expect. She hadn't expected flowers. It was November. The last time she'd stood in this clearing the rowan trees had been stripped bare, the ground a mulch of brown. Now, in the thin wash of moonlight that filtered through the canopy, she could make out clusters of white blooms at her feet — wood anemones, she thought, though she wasn't certain — and further in, nodding heads of something pale yellow. Year-round, Isolde had said once. The grove keeps its own seasons. But there was something about the flowers tonight that made Rory's stomach pull taut. They were too bright. Too still. Not a single petal trembling, though she could feel a breeze against her cheek. She had come for the journal. That was the shape of it, the simple errand she had talked herself into at half-eleven while the London night pressed against the windows of her flat. Isolde had left the journal in the grove three days ago — or what had been three days outside; who knew what it had been inside — and Rory had promised to retrieve it before the weekend. She had her torch. She had the pendant around her neck. She had told herself that the grove was safe, that she'd walked it before. She hadn't walked it alone. At night. Without telling anyone where she was going. The thought arrived now, belatedly, with the mildly reproachful quality of something she should have considered an hour ago when she was still on the 371 bus and it wasn't too late to turn around. Rory clicked on her torch and started forward. The standing stones were behind her quickly. The clearing opened up — perhaps thirty feet across, ringed by oaks so old their branches had grown into each other overhead, knitting a roof of bare winter wood. Or what should have been bare winter wood. She tilted the torch upward and found leaves. Full, summer-dark leaves, heavy and motionless. As wrong as the flowers. She made herself keep walking. The journal was in a hollow at the base of the centremost oak, wrapped in oilskin. Isolde had been very specific. Go straight to it. Don't wander. The pendant shifted against her collarbone. It had been warm since she'd entered the park — warm enough that she'd noticed it through her coat when she crossed the car park on Broomfield Hill Road, warm enough now that she could feel it without pressing her hand to her chest. That meant a Hel portal nearby. She knew that. There was one at the grove's eastern edge, dormant and sealed, Isolde had assured her. Dormant. Sealed. She was walking east. Rory stopped and reoriented herself. She'd drifted without realising it, the torch pulling her toward a gap between two oaks where the moonlight seemed marginally brighter. She turned back toward the centre of the clearing. The centremost oak. Straight line. Something moved in her periphery. She spun the torch toward it — nothing. Just shadow resolving into the familiar shapes of trees, of hanging moss, of the pale flowers below. She held still and listened. The grove was usually quiet in a particular way, a held-breath quality, but this was different. Too quiet. No wind in branches that were full of leaves that should not have been there. No small animal movement. No owl. The silence had texture, had weight, and Rory found herself breathing shallowly as though sound itself might cost her something she couldn't afford to spend. She turned back toward the centremost oak and walked faster. The hollow was where Isolde had described it. She crouched down, felt the oilskin packet with her fingers, and tucked it into her bag without taking her eyes off the middle distance. Standing again, she thumbed her torch wider, sweeping it in a slow arc. That was when she heard it. Footsteps. Not behind her. Not to the side. Ahead — between her and the standing stones at the boundary. A slow, unhurried tread on soft ground, each footfall deliberate, like something that had all the time it needed. She counted four steps, and then silence again. Her mouth had gone dry. She tracked the torch toward the sound and found the flowers. Just the flowers, white and obscenely still, and the dark columns of oaks behind them. "Hello?" The word came out smaller than she intended. Nothing answered. Rory turned the torch off. It was tactics, she told herself. If something was watching her, the torch made her easy to locate and ruined her own sight. In the sudden dark her eyes scrambled to adjust. Shapes assembled themselves slowly from the moonlight — the clearing's rough oval, the roof of impossible leaves, the pale carpet of flowers. She could see the gap between the standing stones from here, forty feet away. She could see the boundary. There was a shape standing at it. It was tall. That was the first thing. Tall enough that she had mistaken it, in the torch light, for one of the oaks — but it was in the wrong place, in the space between trees, filling the gap that was her only exit. It wasn't moving. It was just standing there, and Rory couldn't make out its face, or its features, only the fact of its height and the way it seemed slightly too dark — a darkness that wasn't just shadow but something more absolute, more deliberate, as though light bent around it. She ran her thumb across the scar on her left wrist, the small crescent of raised skin she always found when she needed something to hold onto. The habit was so ingrained she wasn't aware she'd done it until the familiar texture steadied her pulse by half a beat. The pendant was burning now. Not painfully — not yet — but with an intensity that had moved from warmth through heat and was still climbing. The shape at the boundary didn't move. But it was watching her. She was absolutely certain of that in the way she was certain of very few things: it was watching, and it had been watching for some time, and it had let her come into the grove, and retrieve the journal, and turn off her torch, and it had let her do all of this because watching was precisely what it had come here to do. She took one slow step to the left, keeping the centremost oak at her back. The shape didn't turn to follow her, not that she could see — but she had the nauseating conviction that it didn't need to. That it was tracking her without bothering to look. Forty feet was not very far. She'd run a half-marathon in another life, before London, before all of this. She was wearing trainers. The ground was soft but not uneven. Rory breathed in once through her nose. The shape took one step forward into the clearing. She ran. She ran flat out, bag slamming against her hip, arms driving, and the flowers blurred white beneath her feet and the oak roots she'd always been careful to step around became obstacles she cleared without thinking, some animal override cutting out everything but speed and the gap in the stones and the dark strip of path beyond it. She heard nothing behind her — no footsteps, no breath, no sound of pursuit — and that was worse, somehow, than if she had. The silence stretched at her back like something reaching. She hit the boundary between the stones and kept running, out into the park, onto the frost-hard path, the moon full and cold and enormous overhead, the pendant searing against her collarbone like a brand. She ran all the way to the road before she stopped, hands on her knees, gulping cold air, the journal a hard rectangle through the canvas of her bag. She turned back. Through the bare winter oaks — bare, she registered, properly bare, stripped and skeletal as they should have been — she could just make out the pale mouth of the grove in the distance. Nothing stood at the boundary. Nothing moved. The pendant had gone cold. Rory straightened up, wiped her mouth with the back of her hand, and stared at the grove for a long moment. The flowers inside were invisible now from this distance, but she knew they were there. She knew the leaves were there. She knew something had stood at that threshold and chosen — chosen — not to follow her out. She turned toward the car park and the road and the long bus ride back to Silas's bar, and she pulled her coat tight, and she did not run. But she did not look back either. Some calculations, she had learned, were better made in full light, with other people present, at a table that didn't have roots growing under it. She would tell Isolde in the morning. She would show her the journal, and she would describe the shape at the boundary, and she would ask, very calmly, what manner of thing kept summer in November. She pressed her fingers once against the pendant as she walked. It lay still and cool against her skin, saying nothing, offering nothing. That, too, felt like a kind of answer.
created_at"2026-02-24T22:42:34.201Z" 2/24/2026, 10:42:34 PM
model"anthropic/claude-4.6-sonnet-20260217"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency707
moderation_latency(null)
generation_time60343
tokens_prompt812
tokens_completion2659
native_tokens_prompt856
native_tokens_completion2344
native_tokens_completion_images(null)
native_tokens_reasoning294
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"stop"
usage0.037728
router(null)
provider_responses
0
endpoint_id"6d408764-7dd7-4626-bb87-a6cc1589bc86"
id"msg_01CHM96LWVfXQN69Y2iDse9B"
is_byokfalse
latency695
model_permaslug"anthropic/claude-4.6-sonnet-20260217"
provider_name"Anthropic"
status200
api_type"completions"
id"gen-1771972954-keMLQjUNtoWwlWIPVvsp"
upstream_id"msg_01CHM96LWVfXQN69Y2iDse9B"
total_cost0.037728
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"

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
75.12% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1608
totalAiIsmAdverbs8
found
0
adverb"quickly"
count1
1
adverb"very"
count4
2
adverb"slowly"
count1
3
adverb"slightly"
count1
4
adverb"precisely"
count1
highlights
0"quickly"
1"very"
2"slowly"
3"slightly"
4"precisely"
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)
34.70% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1608
totalAiIsms21
found
0
word"sentinels"
count1
1
word"familiar"
count3
2
word"electric"
count1
3
word"stomach"
count1
4
word"could feel"
count2
5
word"resolving"
count1
6
word"silence"
count3
7
word"weight"
count1
8
word"footsteps"
count2
9
word"footfall"
count1
10
word"pulse"
count1
11
word"intensity"
count1
12
word"warmth"
count1
13
word"absolutely"
count1
14
word"searing"
count1
highlights
0"sentinels"
1"familiar"
2"electric"
3"stomach"
4"could feel"
5"resolving"
6"silence"
7"weight"
8"footsteps"
9"footfall"
10"pulse"
11"intensity"
12"warmth"
13"absolutely"
14"searing"
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
narrationSentences127
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount0
narrationSentences127
filterMatches(empty)
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences127
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
maxSentenceWordsSeen65
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1629
ratio0
matches(empty)
62.50% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions4
unquotedAttributions1
matches
0"It was tactics, she told herself."
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions25
wordCount1628
uniqueNames9
maxNameDensity0.61
worstName"Rory"
maxWindowNameDensity1.5
worstWindowName"Rory"
discoveredNames
November2
Isolde6
Rory10
London2
Broomfield1
Hill1
Road1
Hel1
Silas1
persons
0"Isolde"
1"Rory"
2"Silas"
places
0"November"
1"London"
2"Broomfield"
3"Hill"
4"Road"
globalScore1
windowScore1
89.02% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences82
glossingSentenceCount2
matches
0"seemed marginally brighter"
1"felt like a kind of answer"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1629
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences127
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs47
mean34.66
std31.47
cv0.908
sampleLengths
04
174
24
3111
46
589
614
735
88
963
1032
116
1270
134
1440
155
1694
1710
1845
196
201
2145
2231
239
242
255
2673
277
2896
2949
3026
3177
3248
3330
347
359
362
3791
3835
3966
407
415
4260
4361
4436
4523
468
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount1
totalSentences127
matches
0"been stripped"
0.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount10
totalVerbs263
matches
0"was going"
1"was walking"
2"was watching"
3"was just standing"
4"was burning"
5"was still climbing"
6"was watching"
7"was watching"
8"was tracking"
9"was wearing"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount21
semicolonCount1
flaggedSentences15
totalSentences127
ratio0.118
matches
0"She had been to the grove a dozen times now, enough to trust the familiar drop in temperature at the boundary, the way the air here smelled of loam and something older — green and mineral and faintly electric."
1"Now, in the thin wash of moonlight that filtered through the canopy, she could make out clusters of white blooms at her feet — wood anemones, she thought, though she wasn't certain — and further in, nodding heads of something pale yellow."
2"Isolde had left the journal in the grove three days ago — or what had been three days outside; who knew what it had been inside — and Rory had promised to retrieve it before the weekend."
3"The clearing opened up — perhaps thirty feet across, ringed by oaks so old their branches had grown into each other overhead, knitting a roof of bare winter wood."
4"It had been warm since she'd entered the park — warm enough that she'd noticed it through her coat when she crossed the car park on Broomfield Hill Road, warm enough now that she could feel it without pressing her hand to her chest."
5"She spun the torch toward it — nothing."
6"Ahead — between her and the standing stones at the boundary."
7"Shapes assembled themselves slowly from the moonlight — the clearing's rough oval, the roof of impossible leaves, the pale carpet of flowers."
8"Tall enough that she had mistaken it, in the torch light, for one of the oaks — but it was in the wrong place, in the space between trees, filling the gap that was her only exit."
9"It was just standing there, and Rory couldn't make out its face, or its features, only the fact of its height and the way it seemed slightly too dark — a darkness that wasn't just shadow but something more absolute, more deliberate, as though light bent around it."
10"Not painfully — not yet — but with an intensity that had moved from warmth through heat and was still climbing."
11"The shape didn't turn to follow her, not that she could see — but she had the nauseating conviction that it didn't need to."
12"She heard nothing behind her — no footsteps, no breath, no sound of pursuit — and that was worse, somehow, than if she had."
13"Through the bare winter oaks — bare, she registered, properly bare, stripped and skeletal as they should have been — she could just make out the pale mouth of the grove in the distance."
14"She knew something had stood at that threshold and chosen — chosen — not to follow her out."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1613
adjectiveStacks0
stackExamples(empty)
adverbCount61
adverbRatio0.03781773093614383
lyAdverbCount17
lyAdverbRatio0.010539367637941723
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences127
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences127
mean12.83
std12.23
cv0.953
sampleLengths
04
130
239
35
44
53
621
742
85
96
1014
114
122
1314
146
1527
1637
174
187
1914
205
212
227
2335
248
257
2629
278
288
296
305
315
3216
335
344
352
366
3744
386
393
4015
411
421
434
445
4521
469
473
482
495
33.60% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats24
diversityRatio0.31496062992125984
totalSentences127
uniqueOpeners40
57.97% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount2
totalSentences115
matches
0"Just shadow resolving into the"
1"Just the flowers, white and"
ratio0.017
56.52% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount47
totalSentences115
matches
0"She had been to the"
1"She knew what to expect."
2"She hadn't expected flowers."
3"It was November."
4"They were too bright."
5"She had come for the"
6"She had her torch."
7"She had the pendant around"
8"She had told herself that"
9"She hadn't walked it alone."
10"She tilted the torch upward"
11"She made herself keep walking."
12"It had been warm since"
13"She knew that."
14"She was walking east."
15"She'd drifted without realising it,"
16"She turned back toward the"
17"She spun the torch toward"
18"She held still and listened."
19"She turned back toward the"
ratio0.409
73.04% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount89
totalSentences115
matches
0"The wildflowers were wrong."
1"Rory knew it the moment"
2"She had been to the"
3"She knew what to expect."
4"She hadn't expected flowers."
5"It was November."
6"The last time she'd stood"
7"Year-round, Isolde had said once."
8"The grove keeps its own"
9"They were too bright."
10"She had come for the"
11"That was the shape of"
12"Isolde had left the journal"
13"She had her torch."
14"She had the pendant around"
15"She had told herself that"
16"She hadn't walked it alone."
17"The thought arrived now, belatedly,"
18"Rory clicked on her torch"
19"The standing stones were behind"
ratio0.774
86.96% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount2
totalSentences115
matches
0"Now, in the thin wash"
1"If something was watching her,"
ratio0.017
58.82% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences51
technicalSentenceCount6
matches
0"Now, in the thin wash of moonlight that filtered through the canopy, she could make out clusters of white blooms at her feet — wood anemones, she thought, thoug…"
1"But there was something about the flowers tonight that made Rory's stomach pull taut."
2"A slow, unhurried tread on soft ground, each footfall deliberate, like something that had all the time it needed."
3"It was just standing there, and Rory couldn't make out its face, or its features, only the fact of its height and the way it seemed slightly too dark — a darkne…"
4"Some calculations, she had learned, were better made in full light, with other people present, at a table that didn't have roots growing under it."
5"It lay still and cool against her skin, saying nothing, offering nothing."
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
80.9421%