Run: 2026-05-31-01KSYXP0SEDRTG8SS16D3GHTYH

Run Details

Duration:
34.9s
Cost:
$0.056375
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 Aurora counted them twice before she stepped between them. Five oaks, ancient and gnarled, their bark silvered by a moon that hadn't been this full an hour ago. She remembered overcast skies on the walk through Richmond Park, her torch cutting a thin line through fog, her trainers soaked through with dew. Now the fog had pulled back from the clearing like a curtain, and the grove lay open beneath a sky too bright, too clear. She pulled her jacket tighter. "Right," she muttered. "In and out." The pendant lay cold against her sternum. That bothered her more than the moon. The Heartstone always carried a faint warmth, a heartbeat she'd grown used to in the weeks since the stranger had pressed it into her palm. Now it sat against her like a chip of ice, its crimson light dimmed to almost nothing. Wildflowers blanketed the grove floor, poppies and foxglove and things she had no names for, all blooming in defiance of the season. They didn't sway. There was no wind. And yet, somewhere past the tree line, she heard the sound of leaves moving — a long, dry rustle that swelled and faded, swelled and faded, like breathing. Aurora stood still and listened. "Hello?" The word fell flat. No echo. Sound didn't carry the way it should here, swallowed by the open space as though the grove had a throat and her voice had gone down it. She'd come for the answers Eva couldn't give her. The grove remembered things, Eva had said. Stand in the centre, ask your question, and the place would answer in its own time. Aurora had laughed at her then, sitting in the warm yellow light of Silas' bar with a glass of wine sweating on the table between them. She wasn't laughing now. She picked her way to the centre, careful of where she set her feet, though she couldn't have said why. The flowers brushed her ankles. They felt wrong through the fabric of her jeans — too soft, too warm, like they'd been holding heat that didn't belong to them. The rustling stopped. The silence that replaced it was worse. It had weight. It pressed against her ears until she heard the rush of her own blood, the wet click of her throat as she swallowed. "I'm here to ask a question," she said, and hated how small she sounded. "About the portals. About who gave me this." She lifted the pendant on its chain. The stone stayed dark. Something moved at the edge of her vision. She turned her head — slow, controlled, the way she'd learned to move around Evan when his temper had been climbing — and saw only the standing stones and the black space between them. Nothing there. But the certainty crawled up her spine anyway, the animal knowledge older than thought: she was being watched. "Eva," she breathed, "you absolute cow. You knew about this." The wildflowers nearest the stones began to close. Not wilting — closing, petals folding inward in sequence, a wave of darkness rolling across the meadow toward her. It moved deliberately. Where the flowers shut, the moonlight seemed to thin, the colour bleeding out until the grove went grey and flat as an old photograph. Aurora took a step back and her heel came down on something that gave with a soft crunch. She didn't look. She refused to look. A voice came from the tree line. It said her name. "Aurora." Not a whisper. Conversational, warm, pitched exactly like her mother's — and that was the thing that froze her in place, because her mother was in Cardiff, two hundred miles away, and her mother had never once called her by her full name. It had always been Rory. Always. "That's not how she says it," Aurora said. Her hands had curled into fists. "Whatever you are. That's wrong." The voice tried again. This time it was Eva's. "Rory, come here, come closer, I can show you—" "Eva's not here." She backed toward the stones, watching the dark line of trees. "She doesn't sound like that either." Whatever stood in the trees fell quiet, as though considering. The rustling resumed, but it had changed — no longer leaves but something heavier dragging through undergrowth, a slow and patient sound, circling the perimeter of the grove. Left to right. She tracked it by ear because she could see nothing, only shadows that thickened and shifted when she stared too long. The pendant flickered. A single pulse of crimson light, faint as a dying ember, and with it a thread of warmth against her skin. Aurora grabbed it without thinking, closed her fist around the stone. It pulsed again, stronger, and she understood the warmth for what it was — a warning. A Hel portal. Close. Closing. Or opening. The grove had gone fully grey now, every flower shut tight, the moon overhead dimming like a lamp turned low. The dragging sound stopped directly behind her, just past the standing stones, just past the edge of the world she could see. She did not turn around. Her breath fogged in front of her face. The temperature had dropped between one heartbeat and the next, and the cold of the pendant and the cold of the air met somewhere in her chest and made her shake. "I know you're there," she said, and her voice held steadier than she felt. "I'm not going to look at you." The thing behind her exhaled. She felt it stir the hair at the back of her neck, felt the damp heat of it, rank and sweet like meat left out too long. Up close it no longer breathed in rhythm. It panted, quick and shallow, eager. Her mother's voice came again, right at her ear, so close the lips might have brushed her skin. "Aurora. Turn around." The Heartstone burned white-hot in her fist, and the meadow held its breath, and Aurora stared at the black gap between two oak stones three feet ahead of her and did not move.
created_at"2026-05-31T11:46:05.756Z" 5/31/2026, 11:46:05 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2929
moderation_latency(null)
generation_time34823
tokens_prompt1038
tokens_completion1531
native_tokens_prompt1480
native_tokens_completion1959
native_tokens_completion_images(null)
native_tokens_reasoning37
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"
usage0.056375
router(null)
provider_responses
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endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
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is_byokfalse
latency1421
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))"
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request_id"req-1780227965-NXpbTN2KqPcybiN7yHpS"
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api_type"completions"
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upstream_id"msg_01K1o2Lu7iXgLk1hw9oSv1A3"
total_cost0.056375
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provider_name"Anthropic"
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Evaluation details

Result Evaluator Details Meta Data
100.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags7
adverbTagCount0
adverbTags(empty)
dialogueSentences15
tagDensity0.467
leniency0.933
rawRatio0
effectiveRatio0
95.08% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1017
totalAiIsmAdverbs1
found
0
adverb"deliberately"
count1
highlights
0"deliberately"
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"warmth"
count3
1
word"echo"
count1
2
word"silence"
count1
3
word"weight"
count1
4
word"whisper"
count1
5
word"flickered"
count1
6
word"pulse"
count1
7
word"pulsed"
count1
highlights
0"warmth"
1"echo"
2"silence"
3"weight"
4"whisper"
5"flickered"
6"pulse"
7"pulsed"
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
narrationSentences80
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount2
narrationSentences80
filterMatches(empty)
hedgeMatches
0"began to"
1"seemed to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences89
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen40
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1025
ratio0
matches(empty)
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions10
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions18
wordCount941
uniqueNames9
maxNameDensity0.74
worstName"Aurora"
maxWindowNameDensity1.5
worstWindowName"Aurora"
discoveredNames
Aurora7
Richmond1
Park1
Heartstone2
Eva3
Evan1
Cardiff1
Rory1
Hel1
persons
0"Aurora"
1"Heartstone"
2"Eva"
3"Evan"
4"Rory"
places
0"Richmond"
1"Park"
2"Cardiff"
globalScore1
windowScore1
97.92% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences48
glossingSentenceCount1
matches
0"as though considering"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.976
wordCount1025
matches
0"no longer leaves but"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences89
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs38
mean26.97
std21.09
cv0.782
sampleLengths
019
167
25
36
456
557
65
71
833
962
1049
113
1233
1322
1411
158
1654
1710
1854
1925
2011
211
2249
2319
2418
2520
2662
273
2853
292
3042
315
3239
3321
3446
3518
363
3733
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount0
totalSentences80
matches(empty)
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount2
totalVerbs168
matches
0"wasn't laughing"
1"was being"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount8
semicolonCount0
flaggedSentences7
totalSentences89
ratio0.079
matches
0"And yet, somewhere past the tree line, she heard the sound of leaves moving — a long, dry rustle that swelled and faded, swelled and faded, like breathing."
1"They felt wrong through the fabric of her jeans — too soft, too warm, like they'd been holding heat that didn't belong to them."
2"She turned her head — slow, controlled, the way she'd learned to move around Evan when his temper had been climbing — and saw only the standing stones and the black space between them."
3"Not wilting — closing, petals folding inward in sequence, a wave of darkness rolling across the meadow toward her."
4"Conversational, warm, pitched exactly like her mother's — and that was the thing that froze her in place, because her mother was in Cardiff, two hundred miles away, and her mother had never once called her by her full name."
5"The rustling resumed, but it had changed — no longer leaves but something heavier dragging through undergrowth, a slow and patient sound, circling the perimeter of the grove."
6"It pulsed again, stronger, and she understood the warmth for what it was — a warning."
94.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount330
adjectiveStacks1
stackExamples
0"lay cold against her"
adverbCount10
adverbRatio0.030303030303030304
lyAdverbCount0
lyAdverbRatio0
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences89
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences89
mean11.52
std9.49
cv0.824
sampleLengths
019
119
224
324
45
53
63
77
87
925
1017
1122
123
134
1428
155
161
174
182
1927
209
217
2216
2326
244
2520
265
2724
283
297
303
3123
3214
338
347
354
368
3734
382
3918
4010
418
4219
433
4424
4518
463
474
487
494
62.55% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats6
diversityRatio0.4157303370786517
totalSentences89
uniqueOpeners37
0.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount0
totalSentences71
matches(empty)
ratio0
67.89% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount27
totalSentences71
matches
0"She remembered overcast skies on"
1"She pulled her jacket tighter."
2"They didn't sway."
3"She'd come for the answers"
4"She wasn't laughing now."
5"She picked her way to"
6"They felt wrong through the"
7"It had weight."
8"It pressed against her ears"
9"she said, and hated how"
10"She lifted the pendant on"
11"She turned her head —"
12"It moved deliberately."
13"She didn't look."
14"She refused to look."
15"It said her name."
16"It had always been Rory."
17"Her hands had curled into"
18"She backed toward the stones,"
19"She tracked it by ear"
ratio0.38
51.55% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount58
totalSentences71
matches
0"The standing stones rose from"
1"She remembered overcast skies on"
2"She pulled her jacket tighter."
3"The pendant lay cold against"
4"That bothered her more than"
5"The Heartstone always carried a"
6"Wildflowers blanketed the grove floor,"
7"They didn't sway."
8"Aurora stood still and listened."
9"The word fell flat."
10"Sound didn't carry the way"
11"She'd come for the answers"
12"The grove remembered things, Eva"
13"Aurora had laughed at her"
14"She wasn't laughing now."
15"She picked her way to"
16"The flowers brushed her ankles."
17"They felt wrong through the"
18"The rustling stopped."
19"The silence that replaced it"
ratio0.817
100.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount2
totalSentences71
matches
0"Now the fog had pulled"
1"Now it sat against her"
ratio0.028
73.73% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences31
technicalSentenceCount3
matches
0"And yet, somewhere past the tree line, she heard the sound of leaves moving — a long, dry rustle that swelled and faded, swelled and faded, like breathing."
1"They felt wrong through the fabric of her jeans — too soft, too warm, like they'd been holding heat that didn't belong to them."
2"Conversational, warm, pitched exactly like her mother's — and that was the thing that froze her in place, because her mother was in Cardiff, two hundred miles a…"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags7
uselessAdditionCount0
matches(empty)
0.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags6
fancyCount3
fancyTags
0"she muttered (mutter)"
1"Aurora had (have)"
2"she breathed (breathe)"
dialogueSentences15
tagDensity0.4
leniency0.8
rawRatio0.5
effectiveRatio0.4
83.1184%