Run: 2026-05-29-01KSSK752CPMT891MFSK9RDHC9

Run Details

Duration:
36.3s
Cost:
$0.055850
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 rose from the dark like teeth, and Rory passed between them with her phone torch cutting a thin blue line through the grass. Her benefactor's note had been specific. Richmond Park, after the gates closed, the oaks that didn't belong. She'd climbed the fence near Pen Ponds an hour ago, scraped her palm on the railing, and walked north until the manicured grass gave way to something older. The pendant at her throat had warmed the closer she'd come. Now it sat against her sternum like a coal someone had pressed there and forgotten. "Right," she breathed. "I'm here. Whatever you wanted me to see, here I am." The grove answered with silence. Not the silence of an empty park—she knew that sound, the distant hum of the city, planes stacking up for Heathrow, the rustle of foxes in the bracken. This was a thicker thing. The kind that pressed against the ears. Wildflowers crowded her ankles. Foxgloves, she thought, and something pale and bell-shaped she couldn't name, all of them open and blooming though it was past midnight in October. Her torch caught the colours and they looked wrong under the blue light, too saturated, like a photograph someone had pushed too far. She crouched and touched a petal. Warm. Faintly damp. Real. The pendant pulsed. Rory straightened. She turned a slow circle, sweeping the torch across the tree line, and the beam swallowed itself in the gaps between trunks. The dark out there had weight. She found she didn't want to point the light too long at any one spot. "Hello?" Her own voice came back to her flat, like she'd spoken into a cupboard. She checked her phone. The signal bars were gone. The clock read 12:11, the same as when she'd stepped through the stones, and she watched it for a full ten seconds, waiting for the colon to blink, for the 11 to become 12. It didn't. "Course it doesn't." She laughed, and the laugh sounded like it belonged to someone else. "Time moves funny. Course it bloody does." A sound, then. Small. Behind her, off to the left, near the stones she'd come through. A footstep in the grass. She spun. The torch found nothing—just the dark trunks of the boundary oaks, the wildflowers nodding though there was no wind to nod them. She held still and listened so hard her ears began to ring. Nothing. "Eva, if this is you taking the piss—" It wasn't Eva. She knew it wasn't. Eva was three miles away and had no idea Rory had climbed a fence to stand in a haunted meadow because a stranger had left a note under her door. Saying her friend's name out loud was just a way of putting something familiar between herself and the quiet. She started toward the centre of the grove, because the note had said *the heart of it,* and because standing still felt worse than moving. The pendant burned hotter with each step. Good. That meant she was going the right way. She fixed on that thought and held it the way you'd hold a handrail in the dark. The footstep came again. This time it didn't stop. One, two, three—a measured pace, matching hers, off to her right now, just beyond the reach of the torch. She stopped. The footsteps stopped. She took one step. One step answered, a half-second late, like an echo that had to think about it first. "All right." She kept her voice level, the way she'd learned to keep it level with Evan when the air in the flat had gone tight and dangerous. Calm was a tool. Calm was sometimes the only tool. "You want me to know you're there. Fine. I know. What do you want?" The flowers moved. A long, slow ripple ran through them, starting at the tree line and rolling toward her, the way grass bends before a thing that walks through it. Except nothing walked through it. The stalks bowed and rose, bowed and rose, and the wave came on, and Rory's body decided before her mind did—she stepped back, and back, and her heel caught a root and she went down hard on one knee. The ripple stopped a metre from her boots. She didn't breathe. She watched the flowers stand, every one of them, pale faces turned toward her in the torchlight. Waiting. Then, at the edge of her vision, something pale slid between two trees. She didn't look at it directly. She'd learned that too, somewhere—that the things at the corner of your eye dissolve the moment you turn. But she felt it. Tall. Thin. Moving with a smoothness that had nothing to do with walking, as though the dark had grown a shape and the shape had grown an interest in her. "I'm not afraid of you," she said, and the lie tasted like copper. The pendant flared so hot she gasped and clutched it through her shirt. And in the half-instant her eyes squeezed shut, the silence broke. A voice. Right at her ear. Close enough that she should have felt breath, and felt none, which was worse. *"Malphora."* The name wasn't hers. She'd never heard it. And yet some buried part of her flinched the way you flinch at your own name shouted across a crowded room—a deep, cellular recognition that bypassed thought entirely. Her stomach dropped through the warm ground. She scrambled up. The torch beam jittered across the trees, the flowers, the stones, finding nothing, always nothing, and the nothing was full now, crowded, the air gone thick as the inside of a throat. "That's not my name," she said. Her voice cracked on it. Soft laughter moved around her in a slow circle. Not cruel. Patient. The laughter of something that had all the time that didn't exist in this place, and knew she had none of it. The flowers began, one by one, to turn their faces away from her—and toward the stones, as if to watch her only exit.
created_at"2026-05-29T10:07:00.691Z" 5/29/2026, 10:07:00 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3821
moderation_latency(null)
generation_time36306
tokens_prompt1038
tokens_completion1512
native_tokens_prompt1480
native_tokens_completion1938
native_tokens_completion_images(null)
native_tokens_reasoning51
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"
usage0.05585
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01GbHN1LsR81Edtp4BdMYhiT"
is_byokfalse
latency2202
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-1780049220-rZdBxWmTug4wXtV15RlY"
session_id(null)
api_type"completions"
id"gen-1780049220-6iDLyD9khxy13uFx34Ze"
upstream_id"msg_01GbHN1LsR81Edtp4BdMYhiT"
total_cost0.05585
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags5
adverbTagCount0
adverbTags(empty)
dialogueSentences11
tagDensity0.455
leniency0.909
rawRatio0
effectiveRatio0
100.00% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1017
totalAiIsmAdverbs0
found(empty)
highlights(empty)
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)
50.84% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1017
totalAiIsms10
found
0
word"silence"
count3
1
word"pulsed"
count1
2
word"weight"
count1
3
word"familiar"
count1
4
word"measured"
count1
5
word"footsteps"
count1
6
word"echo"
count1
7
word"stomach"
count1
highlights
0"silence"
1"pulsed"
2"weight"
3"familiar"
4"measured"
5"footsteps"
6"echo"
7"stomach"
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
emotionTells0
narrationSentences90
matches(empty)
95.24% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount1
hedgeCount2
narrationSentences90
filterMatches
0"think"
hedgeMatches
0"began to"
1"started to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences95
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen40
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans2
markdownWords5
totalWords1010
ratio0.005
matches
0"the heart of it,"
1"\"Malphora.\""
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions7
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions14
wordCount953
uniqueNames9
maxNameDensity0.42
worstName"Rory"
maxWindowNameDensity1
worstWindowName"Rory"
discoveredNames
Rory4
Park1
Pen1
Ponds1
Heathrow1
October1
Eva2
Evan1
Calm2
persons
0"Rory"
1"Eva"
2"Evan"
places
0"Park"
1"Pen"
2"October"
globalScore1
windowScore1
45.83% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences48
glossingSentenceCount2
matches
0"sounded like it belonged to someone else"
1"tasted like copper"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1010
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences95
matches
0"knew that sound"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs35
mean28.86
std21.34
cv0.739
sampleLengths
026
171
214
345
451
510
63
745
81
914
1045
1122
1216
135
1436
151
1664
1758
184
1949
2052
2174
228
2321
2413
2558
2613
2724
2820
291
3043
3135
3211
3334
3423
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount1
totalSentences90
matches
0"were gone"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount1
totalVerbs171
matches
0"was going"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount7
semicolonCount0
flaggedSentences7
totalSentences95
ratio0.074
matches
0"Not the silence of an empty park—she knew that sound, the distant hum of the city, planes stacking up for Heathrow, the rustle of foxes in the bracken."
1"The torch found nothing—just the dark trunks of the boundary oaks, the wildflowers nodding though there was no wind to nod them."
2"One, two, three—a measured pace, matching hers, off to her right now, just beyond the reach of the torch."
3"The stalks bowed and rose, bowed and rose, and the wave came on, and Rory's body decided before her mind did—she stepped back, and back, and her heel caught a root and she went down hard on one knee."
4"She'd learned that too, somewhere—that the things at the corner of your eye dissolve the moment you turn."
5"And yet some buried part of her flinched the way you flinch at your own name shouted across a crowded room—a deep, cellular recognition that bypassed thought entirely."
6"The flowers began, one by one, to turn their faces away from her—and toward the stones, as if to watch her only exit."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount963
adjectiveStacks0
stackExamples(empty)
adverbCount27
adverbRatio0.028037383177570093
lyAdverbCount5
lyAdverbRatio0.005192107995846314
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences95
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences95
mean10.63
std9.46
cv0.89
sampleLengths
026
16
211
328
411
515
63
711
85
928
105
117
124
1324
1423
156
161
172
181
193
202
2122
226
2315
241
2514
264
275
2834
292
3015
317
323
331
3412
355
362
3722
3812
391
4011
414
4230
4319
4425
457
461
478
4817
494
69.12% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats6
diversityRatio0.45263157894736844
totalSentences95
uniqueOpeners43
46.30% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount1
totalSentences72
matches
0"Then, at the edge of"
ratio0.014
81.11% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount25
totalSentences72
matches
0"Her benefactor's note had been"
1"She'd climbed the fence near"
2"Her torch caught the colours"
3"She crouched and touched a"
4"She turned a slow circle,"
5"She found she didn't want"
6"Her own voice came back"
7"She checked her phone."
8"She laughed, and the laugh"
9"She held still and listened"
10"It wasn't Eva"
11"She knew it wasn't."
12"She started toward the centre"
13"She fixed on that thought"
14"She took one step."
15"She kept her voice level,"
16"She didn't breathe."
17"She watched the flowers stand,"
18"She didn't look at it"
19"She'd learned that too, somewhere—that"
ratio0.347
78.06% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount55
totalSentences72
matches
0"The standing stones rose from"
1"Her benefactor's note had been"
2"Richmond Park, after the gates"
3"She'd climbed the fence near"
4"The pendant at her throat"
5"The grove answered with silence."
6"This was a thicker thing."
7"The kind that pressed against"
8"Wildflowers crowded her ankles."
9"Foxgloves, she thought, and something"
10"Her torch caught the colours"
11"She crouched and touched a"
12"The pendant pulsed."
13"She turned a slow circle,"
14"The dark out there had"
15"She found she didn't want"
16"Her own voice came back"
17"She checked her phone."
18"The signal bars were gone."
19"The clock read 12:11, the"
ratio0.764
69.44% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences72
matches
0"Now it sat against her"
ratio0.014
79.83% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences34
technicalSentenceCount3
matches
0"A long, slow ripple ran through them, starting at the tree line and rolling toward her, the way grass bends before a thing that walks through it."
1"And yet some buried part of her flinched the way you flinch at your own name shouted across a crowded room—a deep, cellular recognition that bypassed thought en…"
2"The laughter of something that had all the time that didn't exist in this place, and knew she had none of it."
0.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags5
uselessAdditionCount2
matches
0"She laughed, and the laugh sounded like it belonged to someone else"
1"she said, and the lie tasted like copper"
0.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags4
fancyCount2
fancyTags
0"she breathed (breathe)"
1"She laughed (laugh)"
dialogueSentences11
tagDensity0.364
leniency0.727
rawRatio0.5
effectiveRatio0.364
80.5256%