Run: 2026-05-31-01KSYX9T6V89AS1GWSB38DFA2R

Run Details

Duration:
36.6s
Cost:
$0.053700
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 came up out of the dark like teeth. Rory had counted on the map app to fail somewhere near the edge of Richmond Park, and it had, the little blue dot spinning useless circles before the screen gave up and went black. She'd walked the last stretch by memory and by the pull in her chest, which was a thing she still didn't have words for. The pendant lay against her sternum, warm. Not hot. Warm, the way a hand left too long on skin went warm, and she'd stopped questioning it three streets back. She ducked between two of the oaks. The bark felt wrong under her palm — too smooth, like something worn down by a great deal of touching. "Right," she said, just to hear a voice. "I'm here. Came all this way." Nobody answered, which was the point. Eva had told her to come alone, and the message had arrived with no number attached, and Rory had decided that walking into an empty field at two in the morning was a marginally better idea than lying awake wondering. She wasn't sure that math held up anymore. Inside the ring of stones, the air changed. It went still in a way that air did not generally go. The wind that had been worrying at her collar all the way across the park simply stopped at the boundary, as though it knew better than to follow. Beyond the oaks she could still see the park — the dark mass of trees, the orange smear of London light against the clouds. But here the sky overhead showed stars she didn't recognise, too many of them, packed close and trembling. Wildflowers brushed her ankles. She looked down. They were open. Full bloom, white and violet faces turned up at a sun that wasn't there. "Okay," she breathed. "That's not — flowers don't do that." Her own voice landed flat. No echo. The clearing swallowed it. She made herself walk to the centre. The grass gave under her trainers without a sound, and that was the second wrong thing, the silence of her own steps, because she should have heard them, the soft crush of it, and there was nothing. She stamped once, hard. Nothing. As if the ground were a held breath. The pendant pulsed. A single beat, like a heart catching, and then warmth spilling outward through the cotton of her shirt. She closed her hand over it. Through the chain she could feel the faint inner glow, crimson leaking between her fingers, and she didn't remember it ever doing that before, not this brightly, not this insistent. "Eva?" The name came out smaller than she wanted. "If this is a joke I'm going to be very cross." At the edge of her sight, something moved. She turned her head. The tree line stood undisturbed, the oaks dark and patient. But she'd seen it — a shape sliding behind a trunk, tall and thin, gone before her eyes found it. The kind of thing the brain manufactures from shadows and tiredness. She told herself that. She was good at telling herself things. She turned back to the centre and it moved again, the other side now, a flicker low to the ground this time, quick. "Hello?" The flowers had closed. She hadn't seen them do it. One moment open and bright and the next folded tight, every bloom in the clearing shut up like fists, and the change felt less like nightfall and more like a decision. The light from the impossible stars dimmed by a degree. The crimson glow of the pendant grew brighter against it, throwing her own shadow long across the grass — and she watched her shadow and understood, slowly, coldly, that it was the only one. There were no others. The stones threw no shadows. The trees threw no shadows. Just her, and the red light, and the dark drawn out behind her toward the ring of oaks. Then a sound. It came from everywhere and from very far away at once — a low, wet click, repeated, like a tongue working against the roof of a mouth. It paused. It started again, closer, and now there was a rhythm to it she didn't like, a patience, the sound of something taking its time because it had no reason to hurry. "I'd like to leave now," she announced to the clearing, and was proud her voice held. "Whatever this is. I'm leaving." She walked toward the gap between the oaks she'd come through. She was certain of the direction. She kept her eyes on the two stones that marked it, pale against the black, and she did not run, because running was what you did when you'd already decided you were prey, and she refused to decide that yet. The gap was further than it should have been. She walked. The stones stayed the same distance. The grass made no sound. The clicking followed at her shoulder, unhurried, and under it now a second noise had started — breathing, slow and deep, far too large to belong to a person, the kind of breath that filled a chest the size of a room. The pendant burned. Not warm now. A real heat, a brand against her chest, and through the pain a thought arrived clean and certain: it's telling me. It pulses near a way through. The way out's not behind me. She stopped. Behind her, the breathing stopped too. She turned around. Slowly. The centre of the clearing lay empty, the closed flowers, the trembling stars. The crimson light spilled from her fist and pushed back the dark by a few feet and no further, and at the edge of that small reach, where the red gave way to black, something stood that was darker than the dark around it. Tall. Thin. Patient. She couldn't make out a face. She had the awful sense that it was making out hers. The clicking started again. "Don't," she whispered. It took a step toward her, and the grass under it made no sound either, and Rory finally understood that the silence had never been the clearing's. It had been its.
created_at"2026-05-31T11:39:25.8Z" 5/31/2026, 11:39:25 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2265
moderation_latency140
generation_time36433
tokens_prompt1038
tokens_completion1509
native_tokens_prompt1480
native_tokens_completion1852
native_tokens_completion_images(null)
native_tokens_reasoning43
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"
usage0.0537
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01MrG4aKc9iDQ61gY94wTKeX"
is_byokfalse
latency1213
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-1780227565-TdaJ6TlPDE97NNECmVWN"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1780227565-BwbDe0oucJRTAJ0js1N1"
upstream_id"msg_01MrG4aKc9iDQ61gY94wTKeX"
total_cost0.0537
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)
dialogueSentences10
tagDensity0.5
leniency1
rawRatio0
effectiveRatio0
75.75% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1031
totalAiIsmAdverbs5
found
0
adverb"very"
count2
1
adverb"slowly"
count2
2
adverb"coldly"
count1
highlights
0"very"
1"slowly"
2"coldly"
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)
66.05% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1031
totalAiIsms7
found
0
word"echo"
count1
1
word"silence"
count2
2
word"pulsed"
count1
3
word"warmth"
count1
4
word"could feel"
count1
5
word"flicker"
count1
highlights
0"echo"
1"silence"
2"pulsed"
3"warmth"
4"could feel"
5"flicker"
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
emotionTells1
narrationSentences85
matches
0"was proud"
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount0
narrationSentences85
filterMatches(empty)
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences90
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen44
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1038
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
totalMentions6
wordCount999
uniqueNames4
maxNameDensity0.3
worstName"Rory"
maxWindowNameDensity1
worstWindowName"Rory"
discoveredNames
Richmond1
Park1
Rory3
London1
persons
0"Rory"
places
0"Richmond"
1"Park"
2"London"
globalScore1
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences53
glossingSentenceCount0
matches(empty)
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1038
matches(empty)
92.59% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount2
totalSentences90
matches
0"sure that math"
1"understood that the"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs34
mean30.53
std27.03
cv0.885
sampleLengths
011
187
227
314
454
58
682
724
810
911
1057
113
1254
1320
148
1556
1623
171
184
1981
2032
213
2260
2321
2457
259
2655
2739
282
296
3081
314
323
3331
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount0
totalSentences85
matches(empty)
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount1
totalVerbs160
matches
0"was making"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount6
semicolonCount0
flaggedSentences6
totalSentences90
ratio0.067
matches
0"The bark felt wrong under her palm — too smooth, like something worn down by a great deal of touching."
1"Beyond the oaks she could still see the park — the dark mass of trees, the orange smear of London light against the clouds."
2"But she'd seen it — a shape sliding behind a trunk, tall and thin, gone before her eyes found it."
3"The crimson glow of the pendant grew brighter against it, throwing her own shadow long across the grass — and she watched her shadow and understood, slowly, coldly, that it was the only one."
4"It came from everywhere and from very far away at once — a low, wet click, repeated, like a tongue working against the roof of a mouth."
5"The clicking followed at her shoulder, unhurried, and under it now a second noise had started — breathing, slow and deep, far too large to belong to a person, the kind of breath that filled a chest the size of a room."
96.23% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount993
adjectiveStacks0
stackExamples(empty)
adverbCount44
adverbRatio0.044310171198388724
lyAdverbCount9
lyAdverbRatio0.00906344410876133
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences90
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences90
mean11.53
std11.06
cv0.959
sampleLengths
011
134
224
37
42
520
67
720
88
96
106
1140
128
138
1412
1528
1624
1718
184
193
203
2114
223
237
245
252
264
277
2837
294
301
318
323
3318
346
3530
369
3711
388
394
4010
4120
4211
434
447
4523
461
474
486
4931
54.81% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats14
diversityRatio0.4222222222222222
totalSentences90
uniqueOpeners38
91.32% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount2
totalSentences73
matches
0"Just her, and the red"
1"Then a sound."
ratio0.027
66.58% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount28
totalSentences73
matches
0"She'd walked the last stretch"
1"She ducked between two of"
2"she said, just to hear"
3"She wasn't sure that math"
4"It went still in a"
5"She looked down."
6"They were open."
7"Her own voice landed flat."
8"She made herself walk to"
9"She stamped once, hard."
10"She closed her hand over"
11"She turned her head."
12"She told herself that."
13"She was good at telling"
14"She turned back to the"
15"She hadn't seen them do"
16"It came from everywhere and"
17"It started again, closer, and"
18"she announced to the clearing,"
19"She walked toward the gap"
ratio0.384
62.74% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount58
totalSentences73
matches
0"The standing stones came up"
1"Rory had counted on the"
2"She'd walked the last stretch"
3"The pendant lay against her"
4"She ducked between two of"
5"The bark felt wrong under"
6"she said, just to hear"
7"Nobody answered, which was the"
8"Eva had told her to"
9"She wasn't sure that math"
10"It went still in a"
11"The wind that had been"
12"Wildflowers brushed her ankles."
13"She looked down."
14"They were open."
15"Her own voice landed flat."
16"The clearing swallowed it."
17"She made herself walk to"
18"The grass gave under her"
19"She stamped once, hard."
ratio0.795
68.49% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences73
matches
0"As if the ground were"
ratio0.014
100.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences32
technicalSentenceCount1
matches
0"The clicking followed at her shoulder, unhurried, and under it now a second noise had started — breathing, slow and deep, far too large to belong to a person, t…"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags5
uselessAdditionCount0
matches(empty)
0.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags4
fancyCount3
fancyTags
0"she breathed (breathe)"
1"she announced (announce)"
2"she whispered (whisper)"
dialogueSentences10
tagDensity0.4
leniency0.8
rawRatio0.75
effectiveRatio0.6
85.8191%