Run: 2026-05-29-01KSSJJ3M0NK07PDYPD6A0DV0K

Run Details

Duration:
39.3s
Cost:
$0.055400
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 directions Eva left were scrawled on the back of a receipt, smudged where Rory's thumb had worried at the ink the whole train ride out. Richmond Park, past the Isabella Plantation, where the path forgot itself among the oaks. Look for the standing stones. Wait for the moon to clear the tallest one. She found them at half eleven, three weathered trunks of oak gone grey and hard as iron, arranged in a rough triangle that no forester had planted. The bark had split into faces that weren't faces. Rory told herself that. Just knots and the way the torchlight slid across them. "All right," she breathed. "I'm here. Now what." The grove answered with silence. Not the ordinary silence of a park after dark — that came layered with distant traffic, a fox somewhere, the hum the city pressed against everything like a palm against glass. This silence had edges. It sat inside the ring of stones the way water sits in a held cup, and the moment Rory stepped between two of the oaks, the noise of London simply stopped. She turned. Behind her the path was still there, pale under the moon, and she could see the dark hedge of the plantation. But she couldn't hear it. The wind moved the leaves and made no sound at all. The pendant lay warm against her sternum. She'd nearly forgotten it. The crimson stone had warmed gradually, the way a mug cooled in reverse, and now it pulsed — slow, steady, a second heartbeat keeping time half a measure behind her own. She drew it out from under her collar and the faint inner glow lit the underside of her chin red. "You're supposed to do that near a—" She stopped. Didn't finish the word. Saying it felt like calling something by name. Wildflowers crowded her boots. Foxgloves, primrose, things that shouldn't share a season, all of them open and bright as though it were noon in June and not a freezing midnight in March. She crouched, touched a petal. It was warm too. Warm the way skin is warm. She stood up fast. "Eva." Her voice came out thin. The grove ate the edges off it. "Eva, if this is a joke, I'll throttle you." The torch flickered. Fresh batteries that afternoon — she'd checked, because she always checked — and the beam stuttered down to a brown filament glow and surged back. In the half-second of dimness she saw movement at the treeline. Low. Quick. Gone when the light returned. Rabbit, she thought. Park's full of them. The pendant beat faster. She made herself breathe. In for four, out for four, the way the counsellor had taught her after Evan, after the months she'd spent flinching at the sound of a key in a lock. Cool head. She had a cool head; people said so. Rory who never panicked, Rory who talked her way out of anything. "Right," she said to the empty clearing. "Benefactor. Whoever you are. I came. So show yourself, or I'm walking back to the train." The flowers turned. Not in a breeze. There was no breeze. Every blossom in the ring of stones pivoted at once, the way a field of sunflowers tracks the day, and they all faced her. Hundreds of small open mouths. Rory took a step back and her heel met something that hadn't been there. She spun. One of the oaks stood close behind her — close enough to touch — and she'd have sworn on her father's life it had been three metres off when she walked in. The knot-faces in its bark were deeper now. One had an open hollow where a mouth would go, and from inside that hollow came a sound she felt in her teeth before she heard it. A long, wet exhalation. Patient. "Okay," she whispered. "Okay. Not a joke." She turned for the path. The pale ribbon of it was still there, but further. The hedge had receded, or the grove had grown, and between her and the gap in the stones the grass had thickened into knee-high meadow that she did not remember crossing. Something moved through it. She caught it sidelong — a parting of the grass, a low arrow of motion that came toward her and stopped the instant she looked dead at it. The blades stood up again, innocent. She swung the torch in a slow arc. Empty. Empty. Empty. And then, at the far edge of the beam, two points of light that were not flowers, set close together at a height that suggested a head, low to the ground, watching her over the meadow. They blinked. Rory's whole body went to ice. Not the panic she'd braced for — something older, something animal, the part of her that knew, knew, she was prey and the dark was full of teeth. "I'm not afraid of you," she said, and the lie tasted of copper. The eyes didn't move. But the exhalation came again from the oak at her back, and now another joined it from her left, and a third from somewhere above, in the branches, where the leaves hung dead still and the moon poured down white and wrong. Three breaths. Then a fourth. Then she lost count, because the whole grove had begun to breathe, the slow tidal heave of something vast that had been holding very still while she walked into the middle of it and announced herself. The pendant burned. She closed her fist around it and the heat bit her palm, and in the glow leaking through her fingers she saw, finally, all of them. They stood among the stones where seconds before there'd been nothing. Tall, thin shapes the colour of birch bark and bone, faces smooth as river stones with those paired lights set where eyes should be, and they did not move, did not breathe like the trees breathed, simply stood and faced her with the absolute attention of things that had waited a long time and were no longer waiting. The nearest was close enough to touch. It tilted its head. "You came," it said, in Eva's voice. "We hoped you would."
created_at"2026-05-29T09:55:31.082Z" 5/29/2026, 9:55:31 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2997
moderation_latency(null)
generation_time39277
tokens_prompt1038
tokens_completion1504
native_tokens_prompt1480
native_tokens_completion1920
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"
usage0.0554
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_019WSb79T52UWQBo34erE22w"
is_byokfalse
latency1946
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-1780048531-KGvdSNnMqI1ZtueipuYX"
session_id(null)
api_type"completions"
id"gen-1780048531-mV3LqRryEMPrbBgJXCwH"
upstream_id"msg_019WSb79T52UWQBo34erE22w"
total_cost0.0554
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
totalTags7
adverbTagCount0
adverbTags(empty)
dialogueSentences12
tagDensity0.583
leniency1
rawRatio0
effectiveRatio0
95.14% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1028
totalAiIsmAdverbs1
found
0
adverb"very"
count1
highlights
0"very"
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)
75.68% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1028
totalAiIsms5
found
0
word"silence"
count3
1
word"pulsed"
count1
2
word"flickered"
count1
highlights
0"silence"
1"pulsed"
2"flickered"
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
hedgeCount0
narrationSentences87
filterMatches(empty)
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences92
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen58
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1036
ratio0
matches(empty)
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
totalMentions21
wordCount980
uniqueNames11
maxNameDensity0.71
worstName"Rory"
maxWindowNameDensity1.5
worstWindowName"Rory"
discoveredNames
Eva2
Rory7
Park2
Isabella1
Plantation1
London1
Didn1
June1
March1
Evan1
Empty3
persons
0"Eva"
1"Rory"
2"Evan"
places
0"Park"
1"Isabella"
2"Plantation"
3"London"
4"June"
5"March"
6"Empty"
globalScore1
windowScore1
91.86% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences43
glossingSentenceCount1
matches
0"felt like calling something by name"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1036
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences92
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs33
mean31.39
std26.67
cv0.85
sampleLengths
054
150
28
35
466
539
67
755
821
947
104
1122
1246
137
144
1556
1623
173
1837
1988
207
2146
224
2381
242
2534
2613
2787
2829
2969
307
314
3211
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount1
totalSentences87
matches
0"were scrawled"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount0
totalVerbs156
matches(empty)
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount8
semicolonCount1
flaggedSentences7
totalSentences92
ratio0.076
matches
0"Not the ordinary silence of a park after dark — that came layered with distant traffic, a fox somewhere, the hum the city pressed against everything like a palm against glass."
1"The crimson stone had warmed gradually, the way a mug cooled in reverse, and now it pulsed — slow, steady, a second heartbeat keeping time half a measure behind her own."
2"Fresh batteries that afternoon — she'd checked, because she always checked — and the beam stuttered down to a brown filament glow and surged back."
3"She had a cool head; people said so."
4"One of the oaks stood close behind her — close enough to touch — and she'd have sworn on her father's life it had been three metres off when she walked in."
5"She caught it sidelong — a parting of the grass, a low arrow of motion that came toward her and stopped the instant she looked dead at it."
6"Not the panic she'd braced for — something older, something animal, the part of her that knew, knew, she was prey and the dark was full of teeth."
94.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount975
adjectiveStacks1
stackExamples
0"lay warm against her"
adverbCount32
adverbRatio0.03282051282051282
lyAdverbCount5
lyAdverbRatio0.005128205128205128
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences92
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences92
mean11.26
std11.47
cv1.018
sampleLengths
026
114
25
39
427
59
64
710
84
94
105
1131
124
1331
142
1521
165
1711
187
194
2031
2120
229
234
248
254
2628
275
284
296
304
316
327
339
343
3525
3611
371
381
395
403
414
424
434
4430
452
468
4712
487
4916
76.81% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats6
diversityRatio0.5
totalSentences92
uniqueOpeners46
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount3
totalSentences73
matches
0"Just knots and the way"
1"Then a fourth."
2"Then she lost count, because"
ratio0.041
100.00% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount19
totalSentences73
matches
0"She found them at half"
1"It sat inside the ring"
2"She'd nearly forgotten it."
3"She drew it out from"
4"She crouched, touched a petal."
5"It was warm too."
6"She stood up fast."
7"Her voice came out thin"
8"She made herself breathe."
9"She had a cool head;"
10"she said to the empty"
11"She turned for the path."
12"She caught it sidelong —"
13"She swung the torch in"
14"she said, and the lie"
15"She closed her fist around"
16"They stood among the stones"
17"It tilted its head."
18"it said, in Eva's voice"
ratio0.26
100.00% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount50
totalSentences73
matches
0"The directions Eva left were"
1"Richmond Park, past the Isabella"
2"She found them at half"
3"The bark had split into"
4"Rory told herself that."
5"The grove answered with silence."
6"This silence had edges."
7"It sat inside the ring"
8"The wind moved the leaves"
9"The pendant lay warm against"
10"She'd nearly forgotten it."
11"The crimson stone had warmed"
12"She drew it out from"
13"Wildflowers crowded her boots."
14"Foxgloves, primrose, things that shouldn't"
15"She crouched, touched a petal."
16"It was warm too."
17"She stood up fast."
18"Her voice came out thin"
19"The grove ate the edges"
ratio0.685
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences73
matches(empty)
ratio0
19.70% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences29
technicalSentenceCount5
matches
0"Foxgloves, primrose, things that shouldn't share a season, all of them open and bright as though it were noon in June and not a freezing midnight in March."
1"Rory took a step back and her heel met something that hadn't been there."
2"And then, at the far edge of the beam, two points of light that were not flowers, set close together at a height that suggested a head, low to the ground, watch…"
3"Not the panic she'd braced for — something older, something animal, the part of her that knew, knew, she was prey and the dark was full of teeth."
4"Tall, thin shapes the colour of birch bark and bone, faces smooth as river stones with those paired lights set where eyes should be, and they did not move, did …"
53.57% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags7
uselessAdditionCount1
matches
0"she said, and the lie tasted of copper"
0.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags5
fancyCount2
fancyTags
0"she breathed (breathe)"
1"she whispered (whisper)"
dialogueSentences12
tagDensity0.417
leniency0.833
rawRatio0.4
effectiveRatio0.333
83.5588%