Run: 2026-02-19-01KHV72HMKH5XDWEX8M2Q77YA2

Run Details

Duration:
34.8s
Cost:
$0.022146
Provider:
Anthropic

Model input

System
You are an expert fiction writer. Always keep the following rules in mind: - Write in past tense and use General English spelling, grammar, and colloquialisms/slang. - Write in active voice - Always follow the "show, don't tell" principle. - Avoid adverbs and cliches and overused/commonly used phrases. Aim for fresh and original descriptions. - Convey events and story through dialogue. - Mix short, punchy sentences with long, descriptive ones. Drop fill words to add variety. - Skip "he/she said said" dialogue tags and convey people's actions or face expressions through their speech - Avoid mushy dialog and descriptions, have dialogue always continue the action, never stall or add unnecessary fluff. Vary the descriptions to not repeat yourself. - Put dialogue on its own paragraph to separate scene and action. - Reduce indicators of uncertainty like "trying" or "maybe" When writing text: - NEVER conclude the scene on your own, follow the beat instructions very closely. - NEVER end with foreshadowing. - NEVER write further than what I prompt you with. - AVOID imagining possible endings, NEVER deviate from the instructions. - STOP EARLY if the continuation contains what was required in the instructions. You do not need to fill out the full amount of words possible.
User/Human
Take into account the following glossary of characters/locations/items/lore... when writing your response: <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> Continue the story using the following instructions: <instructions> 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. </instructions>

Model response

AI
The standing stones were taller than she remembered. Rory stood at the edge of Richmond Park, where the manicured grass gave way to something older and less willing to be tamed. The tree line ahead absorbed the last of the amber glow from the distant car park lamps, and beyond it, nothing. The Grove swallowed light the way deep water swallowed sound. She checked her phone. Quarter past midnight. She'd told herself she wouldn't come back here after dark, but the note had been specific. Handwritten on paper that smelled of earth and something sweetly wrong, like fruit left just a day too long. *The Grove. After dark. Alone. Bring the stone.* The Heartstone Pendant hung against her sternum, warmer than it had any right to be on a November night. She pressed two fingers to it through her jacket, felt the steady pulse of it like a second heartbeat that wasn't hers. She stepped through. The cold left first. That was always the first thing — the English winter simply stopped, as though she'd passed through a door into a room where autumn hadn't finished yet. Wildflowers caught the moonlight at her ankles, white and pale blue things that had no business blooming in November. The oaks that ringed the clearing were enormous and close, their roots knuckled above the earth like the fingers of buried hands. Rory stood still and listened. Wind through leaves. A distant owl, once. Then silence thick enough to press against her ears. She moved toward the centre of the clearing. The grass here was soft in a way that felt almost deliberate, like a welcome mat laid out by something that understood the concept but not quite the warmth behind it. She turned slowly, taking stock. The stones stood at the boundary as always, eight of them, each roughly the height of a man, dark with moisture despite the dry air. Eight. She counted again. Nine. She stopped. The ninth stone stood between two she knew — had always known — were adjacent. It was slightly shorter than the others, its surface smoother, without the lichen that crusted the rest. She stared at it for a long moment. It didn't move. Of course it didn't move. Stones didn't move. She looked away, back toward the centre of the clearing, and pressed her thumbnail into the crescent-shaped scar on her wrist. A habit. An anchor. Something rustled at the far tree line. "Hello?" Her voice came out steadier than she felt, which was something. The rustling stopped. The pendant flared warm against her chest — not painfully, but suddenly, the way a coal brightens when you blow on it. She looked down at it reflexively, though it was hidden under her jacket, and when she looked up again the clearing felt different. Not visually. Nothing had changed that she could point to. It was more like the atmosphere of the place had shifted one degree, the way a room changes when someone enters it who hasn't yet spoken. She was not alone. She knew this the way she'd once known, in the last months with Evan, that the sound of the front door at night was never just the front door. A body learns threat before the mind catches up. Her shoulders drew in. She made herself unfold them. "I got your note," she said, to the clearing, to the trees, to whatever was arranging itself in the dark just beyond her line of sight. "I'm here." Nothing answered. The flowers nearest the tree line bent, all at once, in a direction opposite to where the wind was coming from. She watched them. They righted themselves slowly, petal by petal. She took three steps toward the stone she didn't recognise. Up close, it was wrong in ways that resisted description. The grain of it didn't match the local stone — it was too dark, too smooth, and its surface held faint impressions that might have been letters or might have been the shadows of letters, visible only at the edge of her direct gaze. When she looked straight at them, they vanished. She reached out one hand, stopped an inch from its surface. The pendant pulsed hard. Once, like a fist knocking. She withdrew her hand. Behind her — close, maybe four metres — she heard breathing. Slow and deliberate, measured as a metronome. She turned around in one smooth movement. The clearing was empty. But the grass behind her held two long depressions, parallel, side by side. Like something had been standing there. Like it had stepped back when she turned. Rory's heart threw itself against her ribs three times in quick succession. She breathed through her nose, held it, let it go. "Right," she said quietly. She turned back to the stone and this time kept her eyes fixed on it, refusing the urge to look at her peripheral vision where things kept suggesting themselves — a shape between two oaks that was probably just shadow, a pale curve above the tree line that was certainly just cloud, a reflection on the dewy grass that moved in a way reflections didn't move. The breathing started again. Closer. The pendant had stopped pulsing. The absence of it was somehow worse, like a warning light that goes out not because the danger has passed but because the system has given up reporting it. She stared at the new stone. In the surface of it, in the grain she'd thought was too smooth to hold anything, she could see — not letters. A face. Or the suggestion of one. Eyes closed. Mouth pressed shut. Hands she hadn't noticed before, folded beneath it, fingers against its own surface from the inside. From the inside. Something touched her shoulder.
created_at"2026-02-19T15:07:41.35Z" 2/19/2026, 3:07:41 PM
model"anthropic/claude-4.6-sonnet-20260217"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency812
moderation_latency179
generation_time34141
tokens_prompt1038
tokens_completion1433
native_tokens_prompt1047
native_tokens_completion1267
native_tokens_completion_images(null)
native_tokens_reasoning0
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"
usage0.022146
router(null)
provider_responses
0
endpoint_id"6d408764-7dd7-4626-bb87-a6cc1589bc86"
id"msg_01VwNe6QGGXnQMDhtAwKRjCC"
is_byokfalse
latency812
model_permaslug"anthropic/claude-4.6-sonnet-20260217"
provider_name"Anthropic"
status200
api_type"completions"
id"gen-1771513661-JyaFWOwvSSXdXDAnNlm3"
upstream_id"msg_01VwNe6QGGXnQMDhtAwKRjCC"
total_cost0.022146
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"

Evaluation details

Result Evaluator Details Meta Data
0.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags3
adverbTagCount1
adverbTags
0"she said quietly [quietly]"
dialogueSentences4
tagDensity0.75
leniency1
rawRatio0.333
effectiveRatio0.333
73.79% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount954
totalAiIsmAdverbs5
found
0
adverb"sweetly"
count1
1
adverb"slowly"
count2
2
adverb"slightly"
count1
3
adverb"suddenly"
count1
highlights
0"sweetly"
1"slowly"
2"slightly"
3"suddenly"
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)
73.79% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount954
totalAiIsms5
found
0
word"pulse"
count1
1
word"silence"
count1
2
word"warmth"
count1
3
word"pulsed"
count1
4
word"measured"
count1
highlights
0"pulse"
1"silence"
2"warmth"
3"pulsed"
4"measured"
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
narrationSentences90
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount0
narrationSentences90
filterMatches(empty)
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences91
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
maxSentenceWordsSeen65
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans1
markdownWords8
totalWords962
ratio0.008
matches
0"The Grove. After dark. Alone. Bring the stone."
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
totalMentions13
wordCount954
uniqueNames9
maxNameDensity0.31
worstName"Rory"
maxWindowNameDensity1
worstWindowName"Grove"
discoveredNames
Richmond1
Park1
Grove2
Heartstone1
Pendant1
November2
English1
Evan1
Rory3
persons
0"Grove"
1"Pendant"
2"Evan"
3"Rory"
places
0"Richmond"
1"Park"
2"November"
globalScore1
windowScore1
97.92% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences48
glossingSentenceCount1
matches
0"not quite the warmth behind it"
96.05% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords1.04
wordCount962
matches
0"not painfully, but suddenly, the way a coal brightens"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences91
matches
0"changed that she"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs38
mean25.32
std25.69
cv1.015
sampleLengths
08
154
250
341
43
572
65
716
869
94
101
112
1276
137
1412
153
1681
174
1847
1928
202
2131
2210
2373
249
254
2625
274
2827
2922
304
3166
325
3334
346
3550
363
374
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount1
totalSentences90
matches
0"was hidden"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount2
totalVerbs164
matches
0"was arranging"
1"was coming"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount9
semicolonCount0
flaggedSentences7
totalSentences91
ratio0.077
matches
0"That was always the first thing — the English winter simply stopped, as though she'd passed through a door into a room where autumn hadn't finished yet."
1"The ninth stone stood between two she knew — had always known — were adjacent."
2"The pendant flared warm against her chest — not painfully, but suddenly, the way a coal brightens when you blow on it."
3"The grain of it didn't match the local stone — it was too dark, too smooth, and its surface held faint impressions that might have been letters or might have been the shadows of letters, visible only at the edge of her direct gaze."
4"Behind her — close, maybe four metres — she heard breathing."
5"She turned back to the stone and this time kept her eyes fixed on it, refusing the urge to look at her peripheral vision where things kept suggesting themselves — a shape between two oaks that was probably just shadow, a pale curve above the tree line that was certainly just cloud, a reflection on the dewy grass that moved in a way reflections didn't move."
6"In the surface of it, in the grain she'd thought was too smooth to hold anything, she could see — not letters."
89.68% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount946
adjectiveStacks0
stackExamples(empty)
adverbCount49
adverbRatio0.05179704016913319
lyAdverbCount14
lyAdverbRatio0.014799154334038054
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences91
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences91
mean10.57
std10.64
cv1.007
sampleLengths
08
123
221
310
44
53
616
719
82
92
101
113
1219
1322
143
154
1627
1719
1822
195
203
214
229
238
2431
255
2625
271
283
291
302
3115
3217
338
343
355
363
3721
382
392
407
4112
423
4322
4423
452
468
4726
484
4929
67.40% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats7
diversityRatio0.45054945054945056
totalSentences91
uniqueOpeners41
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount3
totalSentences77
matches
0"Then silence thick enough to"
1"Of course it didn't move."
2"Once, like a fist knocking."
ratio0.039
69.35% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount29
totalSentences77
matches
0"She checked her phone."
1"She'd told herself she wouldn't"
2"She pressed two fingers to"
3"She stepped through."
4"She moved toward the centre"
5"She turned slowly, taking stock."
6"She counted again."
7"It was slightly shorter than"
8"She stared at it for"
9"It didn't move."
10"She looked away, back toward"
11"Her voice came out steadier"
12"She looked down at it"
13"It was more like the"
14"She was not alone."
15"She knew this the way"
16"Her shoulders drew in."
17"She made herself unfold them."
18"she said, to the clearing,"
19"She watched them."
ratio0.377
70.39% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount60
totalSentences77
matches
0"The standing stones were taller"
1"Rory stood at the edge"
2"The tree line ahead absorbed"
3"The Grove swallowed light the"
4"She checked her phone."
5"Quarter past midnight."
6"She'd told herself she wouldn't"
7"The Heartstone Pendant hung against"
8"She pressed two fingers to"
9"She stepped through."
10"The cold left first."
11"That was always the first"
12"Wildflowers caught the moonlight at"
13"The oaks that ringed the"
14"Rory stood still and listened."
15"A distant owl, once."
16"She moved toward the centre"
17"The grass here was soft"
18"She turned slowly, taking stock."
19"The stones stood at the"
ratio0.779
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences77
matches(empty)
ratio0
27.65% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences31
technicalSentenceCount5
matches
0"Handwritten on paper that smelled of earth and something sweetly wrong, like fruit left just a day too long."
1"Wildflowers caught the moonlight at her ankles, white and pale blue things that had no business blooming in November."
2"The grass here was soft in a way that felt almost deliberate, like a welcome mat laid out by something that understood the concept but not quite the warmth behi…"
3"The grain of it didn't match the local stone — it was too dark, too smooth, and its surface held faint impressions that might have been letters or might have be…"
4"She turned back to the stone and this time kept her eyes fixed on it, refusing the urge to look at her peripheral vision where things kept suggesting themselves…"
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
totalTags2
fancyCount0
fancyTags(empty)
dialogueSentences4
tagDensity0.5
leniency1
rawRatio0
effectiveRatio0
82.2008%