Run: 2026-06-01-01KT1HKC35DKF5VQCTBKER1RGN

Run Details

Duration:
38.2s
Cost:
$0.056250
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 caught the moonlight first—five oaks petrified into grey, their bark turned to something harder than wood, ringed around the clearing like teeth in an open mouth. Rory stepped between two of them and the night changed. She felt it on her skin before her mind named it. The traffic that had followed her across Richmond Park, the distant grind of the city—gone. Not muffled. Gone, as if someone had reached down and pressed a thumb against the world's throat. "Right," she whispered. Her breath didn't fog, though the December air should have made it. "I'm here. Show yourself." The pendant lay cool against her sternum. She'd half expected it to wake, to throb with that warmth it gave near the thin places. Nothing. Just a stone the colour of dried blood, dead as a button. Wildflowers grew at her feet. Foxgloves, cornflowers, things she had no name for—all of them blooming in the dead of winter, all of them turned toward her like an audience. She knelt and brushed a finger across a petal. It was warm. Body warm. She pulled her hand back. The note had told her to come at moonrise. A scrap of paper slipped under her door, ink the wrong shade of brown, the handwriting too neat to be human. *The Grove. Alone. The pendant will explain.* She'd told herself she was clever enough to walk in and out of a trap. Standing here now, with the silence pressing against her eardrums, the cleverness felt thin. "Hello?" Her voice didn't carry. It fell off her lips and dropped into the grass like something thrown down a well. A sound came back. Behind her—a soft, dragging shush, the way long fabric moves across stone. She turned. The gap between the two oaks she'd entered through showed only the park beyond, the dark slope of grass, a sky bruised purple at its edges. No one. "I don't have time for games." The grass to her left moved. Not a breeze—a single line of motion, a furrow pushing through the wildflowers as though something low and unseen slid between the stems. It stopped three feet from her boot. Rory's pulse climbed into her ears. She made herself breathe. Eva had taught her that, after the worst nights with Evan—name what's real, hold to it. The stones were real. The cold was real. The thing in the grass— The furrow was gone. The flowers stood straight again, undisturbed, as if she'd imagined the whole crawling line of it. "Okay." She drew the word out, low. "Okay." She walked toward the centre of the clearing, where the grass gave way to a ring of bare earth. Her shadow stretched ahead of her, long and black under the climbing moon. She watched it slide across the ground. It had the wrong number of arms. She froze. Counted again. Two arms, her arms, swinging at her sides exactly where they should be—and a third, faint, pooled off her left shoulder, reaching. She spun. Empty air. The moon hung clean and indifferent above the oaks. When she looked down, the shadow was only hers. A laugh built in her chest, the kind that comes before panic, and she swallowed it. "You're trying to spook me." She said it loud, to the trees, to the flowers, to whatever watched. "It's working. Congratulations. Now tell me why I'm here or I'm leaving." The answer came as a smell. Crushed green things, and beneath that, sweeter—rot, the cloying ferment of fruit left too long. It rolled over her from every direction at once. She covered her nose with her sleeve and turned a slow circle. The standing stones had moved. She was certain. When she'd entered there'd been a wide gap, the path back to the open park clear between two oaks. Now the stones crowded closer, the gaps narrowed to slits a body could barely fit through, and she couldn't find the one she'd come by. Five identical grey teeth, and her, soft and small, in the centre of the bite. "That's enough." Her own voice cracked. She started toward the nearest gap and her foot caught—the grass had grown, threaded itself around her ankle, thin green wire that tightened when she pulled. She bent, tore at it. The stems wept a clear sap that stung her fingers, and from somewhere close, so close she felt it move the hair beside her ear, came a sound she'd never heard from any living throat. It was almost a word. Almost her name. "*Aurora.*" She wrenched free and ran. The clearing stretched—she'd swear it stretched, the gap between the stones pulling away from her with every stride, the bare earth lengthening like pulled toffee. The flowers turned their heads to follow. The smell of rot thickened until she tasted it. And the third shadow was back, she could feel it now rather than see it, a weight off her left side that moved when she moved, gaining. "*Aurora. You came.*" The voice was kind. That was the worst of it. It carried a warmth the night didn't have, the gentleness of someone who'd been waiting a long while and was glad, so glad, to finally be found. The pendant flared. Heat bloomed against her chest, sudden and fierce, and she gasped and clutched it through her shirt. The crimson stone burned like a coal—and in its light, thrown up against the inside of her closed fingers, she saw the clearing properly for one heartbeat. Saw what stood at the treeline where she'd been about to run. Saw the shape of it, tall and patient and almost human, the way a mannequin is almost a person. Then her hand reached the gap between two stones and the warmth of the pendant pulsed once more, harder, dragging her forward like a hook behind the ribs. "Wait—" the kind voice said, and now it wasn't kind at all. "*You're not finished.*" She threw herself between the oaks.
created_at"2026-06-01T12:12:39.405Z" 6/1/2026, 12:12:39 PM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2889
moderation_latency(null)
generation_time38207
tokens_prompt1038
tokens_completion1511
native_tokens_prompt1480
native_tokens_completion1954
native_tokens_completion_images(null)
native_tokens_reasoning46
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"
usage0.05625
router(null)
provider_responses
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endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01PqWbvXLPNge7xDTcCM9GQk"
is_byokfalse
latency1227
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-1780315959-SZSpsFPRwHee4hj2KUJC"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1780315959-TYqsWWoH3HJ9duPvzoBF"
upstream_id"msg_01PqWbvXLPNge7xDTcCM9GQk"
total_cost0.05625
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
totalTags4
adverbTagCount0
adverbTags(empty)
dialogueSentences13
tagDensity0.308
leniency0.615
rawRatio0
effectiveRatio0
100.00% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1010
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)
55.45% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1010
totalAiIsms9
found
0
word"throb"
count1
1
word"warmth"
count3
2
word"silence"
count1
3
word"pulse"
count1
4
word"could feel"
count1
5
word"weight"
count1
6
word"pulsed"
count1
highlights
0"throb"
1"warmth"
2"silence"
3"pulse"
4"could feel"
5"weight"
6"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
narrationSentences87
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount1
narrationSentences87
filterMatches(empty)
hedgeMatches
0"started to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences96
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen35
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans4
markdownWords14
totalWords999
ratio0.014
matches
0"The Grove. Alone. The pendant will explain."
1"Aurora."
2"Aurora. You came."
3"You're not finished."
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions8
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions5
wordCount958
uniqueNames5
maxNameDensity0.1
worstName"Richmond"
maxWindowNameDensity0
worstWindowName(null)
discoveredNames
Richmond1
Park1
December1
Grove1
Evan1
persons
0"Evan"
places
0"Richmond"
1"Park"
globalScore1
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences56
glossingSentenceCount0
matches(empty)
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount999
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences96
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs35
mean28.54
std22.52
cv0.789
sampleLengths
039
143
219
337
444
55
666
71
820
946
106
1136
1239
1320
148
1539
167
1748
1816
1930
2042
215
2262
232
2470
258
261
2773
283
2937
303
3175
3228
3315
346
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount1
totalSentences87
matches
0"was gone"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount0
totalVerbs163
matches(empty)
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount12
semicolonCount0
flaggedSentences12
totalSentences96
ratio0.125
matches
0"The standing stones caught the moonlight first—five oaks petrified into grey, their bark turned to something harder than wood, ringed around the clearing like teeth in an open mouth."
1"The traffic that had followed her across Richmond Park, the distant grind of the city—gone."
2"Foxgloves, cornflowers, things she had no name for—all of them blooming in the dead of winter, all of them turned toward her like an audience."
3"Behind her—a soft, dragging shush, the way long fabric moves across stone."
4"Not a breeze—a single line of motion, a furrow pushing through the wildflowers as though something low and unseen slid between the stems."
5"Eva had taught her that, after the worst nights with Evan—name what's real, hold to it."
6"The thing in the grass—"
7"Two arms, her arms, swinging at her sides exactly where they should be—and a third, faint, pooled off her left shoulder, reaching."
8"Crushed green things, and beneath that, sweeter—rot, the cloying ferment of fruit left too long."
9"She started toward the nearest gap and her foot caught—the grass had grown, threaded itself around her ankle, thin green wire that tightened when she pulled."
10"The clearing stretched—she'd swear it stretched, the gap between the stones pulling away from her with every stride, the bare earth lengthening like pulled toffee."
11"The crimson stone burned like a coal—and in its light, thrown up against the inside of her closed fingers, she saw the clearing properly for one heartbeat."
94.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount969
adjectiveStacks1
stackExamples
0"lay cool against her"
adverbCount29
adverbRatio0.029927760577915376
lyAdverbCount6
lyAdverbRatio0.006191950464396285
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences96
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences96
mean10.41
std8.3
cv0.797
sampleLengths
029
110
211
315
42
515
63
712
84
97
1017
111
1212
135
1425
159
163
172
185
199
2021
212
221
2319
2414
251
264
2716
284
2912
302
3126
322
336
346
3523
367
376
384
3916
404
414
425
434
4416
457
461
4719
4813
497
56.60% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats9
diversityRatio0.3958333333333333
totalSentences96
uniqueOpeners38
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount3
totalSentences75
matches
0"Just a stone the colour"
1"Almost her name."
2"Then her hand reached the"
ratio0.04
81.33% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount26
totalSentences75
matches
0"She felt it on her"
1"Her breath didn't fog, though"
2"She'd half expected it to"
3"She knelt and brushed a"
4"It was warm."
5"She pulled her hand back."
6"Her voice didn't carry."
7"It fell off her lips"
8"It stopped three feet from"
9"She made herself breathe."
10"She drew the word out,"
11"She walked toward the centre"
12"Her shadow stretched ahead of"
13"She watched it slide across"
14"It had the wrong number"
15"She said it loud, to"
16"It rolled over her from"
17"She covered her nose with"
18"She was certain."
19"Her own voice cracked."
ratio0.347
66.67% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount59
totalSentences75
matches
0"The standing stones caught the"
1"Rory stepped between two of"
2"She felt it on her"
3"The traffic that had followed"
4"Her breath didn't fog, though"
5"The pendant lay cool against"
6"She'd half expected it to"
7"Wildflowers grew at her feet."
8"Foxgloves, cornflowers, things she had"
9"She knelt and brushed a"
10"It was warm."
11"She pulled her hand back."
12"The note had told her"
13"A scrap of paper slipped"
14"The pendant will explain.* She'd"
15"Her voice didn't carry."
16"It fell off her lips"
17"A sound came back."
18"The gap between the two"
19"The grass to her left"
ratio0.787
66.67% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences75
matches
0"Now the stones crowded closer,"
ratio0.013
27.03% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences37
technicalSentenceCount6
matches
0"Not a breeze—a single line of motion, a furrow pushing through the wildflowers as though something low and unseen slid between the stems."
1"Two arms, her arms, swinging at her sides exactly where they should be—and a third, faint, pooled off her left shoulder, reaching."
2"A laugh built in her chest, the kind that comes before panic, and she swallowed it."
3"She started toward the nearest gap and her foot caught—the grass had grown, threaded itself around her ankle, thin green wire that tightened when she pulled."
4"The stems wept a clear sap that stung her fingers, and from somewhere close, so close she felt it move the hair beside her ear, came a sound she'd never heard f…"
5"It carried a warmth the night didn't have, the gentleness of someone who'd been waiting a long while and was glad, so glad, to finally be found."
0.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags4
uselessAdditionCount1
matches
0"She drew, low"
73.08% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags3
fancyCount1
fancyTags
0"she whispered (whisper)"
dialogueSentences13
tagDensity0.231
leniency0.462
rawRatio0.333
effectiveRatio0.154
84.0271%