Run: 2026-05-31-01KSYXAXBJ5B2ANT4BQRNHJ5YD

Run Details

Duration:
37.8s
Cost:
$0.056150
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 out of the dark like teeth. Rory ducked between two of them, the ancient oak rough under her palm, and stepped into the grove. Her phone's torch threw a thin cone of light across the grass. Behind her, Richmond Park had been quiet in the way only a city park managed after midnight — the distant rush of traffic, a fox barking somewhere, the wet sigh of London breathing in its sleep. Here, none of that. She stopped. Listened. Nothing. Not the traffic, not the wind, not even the small insect hum she hadn't realised she'd grown used to until it was gone. The silence pressed against her ears like deep water. "Right," she muttered. "In and out." The pendant lay warm against her sternum. It had been pulsing all the way across the park, a slow steady heat she'd mistaken for nerves until she'd cupped it in her hand and felt it answer her like a second heartbeat. The Heartstone had brought her here. Eva had said to follow it. Eva had said a lot of things before she'd gone quiet on the phone three nights ago. Rory swept the torch in a wide arc. Wildflowers everywhere — bluebells, foxglove, things she couldn't name that had no business blooming together, never mind in the dead of a London winter. They didn't move. No breeze stirred them. They stood at attention, every petal sharp in the white light, and the wrongness of it crawled up the back of her neck before her brain caught up to why. Flowers should sway. Even a little. Even with her standing right there breathing on them. These didn't. "Eva?" Her voice came out smaller than she'd wanted. It didn't carry. It dropped from her mouth and died at her feet, swallowed by that thick dark, and she had the sudden absurd sense that something had reached out and caught the word before it could travel any further. She walked deeper in. The grass gave under her boots without a sound. That was the next thing — no crunch, no rustle, just a soft yielding nothing, like stepping on something that had been waiting to be stepped on. She glanced down to check her feet were really there and felt foolish, and kept walking. The torch flickered. She shook the phone. Eighty-two percent. The light steadied, then dimmed again, the beam narrowing as though something were drinking it. She angled it toward the centre of the clearing where a ring of paler grass marked some old burning, or dancing, or worse. A figure stood at the edge of the light. Rory's heart slammed once, hard, and she swung the torch full onto it. A tree. Just a young birch, pale-barked, its branches bare. She breathed out through her teeth. "Get a grip." She moved past it. And as she moved, she would have sworn — would have put her own hand in fire and sworn — that the birch hadn't been there when she'd first come through the stones. She'd looked at this part of the grove. She'd looked right at it. The pendant flared against her skin, hot enough now to sting. "Okay. Okay, I hear you." She turned in a slow circle, holding the stone out from her chest by its silver chain. The crimson glow had deepened, throbbing in time with that buried pulse, and she watched it brighten as she faced the far treeline and dim as she turned away. Brighten. There. Whatever it wanted her to find waited in that direction, in the deeper black where her torch couldn't reach. Something moved. Not in front of her. At the edge — that grey margin where vision frays into nothing. A shape, low and long, sliding between the trunks. She snapped the torch toward it and caught only flowers, still and watchful, and the empty dark beyond. "I'm not scared of you," she said. The dark didn't believe her either. She made herself walk. One step. Another. The grass gave its silent nothing underfoot and the trees crept past on either side, too close now, the clearing narrowing into a throat. She kept her eyes forward, but the movement came again, this time on her left, keeping pace with her. Low. Patient. When she looked, it stopped. When she walked, it walked. "Eva, if this is you—" A sound, finally. From behind. A small, wet click, like a tongue against the roof of a mouth, like someone about to speak who had thought better of it. Rory froze. She did not turn around. Every animal instinct she owned screamed at her to run, and underneath that, a colder voice — her father's courtroom voice, the one that had never once raised itself — said *don't. Whatever it is, it's faster than you. Don't let it know you know.* The click came again. Closer. At the level of her ear, where no mouth that stood on the ground could possibly reach. Her breath fogged in front of her face. When had it gotten cold? The flowers wore a skin of frost now, white and glittering in the dying torchlight, and her own exhale hung in the air a beat too long, twisting, holding a shape before it dissolved. The pendant burned. She closed her fist around it and the heat bit into her palm and she welcomed it, because it was real, because it was hers, because everything else in this place felt like a held breath waiting for her to make the first mistake. Slowly, she turned her head. The birch stood three feet behind her. It had not been three feet behind her. She had left it forty paces back at the edge of the clearing, and now its pale trunk loomed close enough to touch, and along its smooth bark were dark vertical seams she hadn't seen before, paired and even, running top to bottom like a row of closed eyes. One of them opened. Rory ran. She didn't decide to. Her body decided for her, wrenching her around and hurling her toward the treeline where the pendant burned brightest, and the silence shattered behind her into a long dry rattle that was almost, but not quite, the sound of laughter.
created_at"2026-05-31T11:40:01.792Z" 5/31/2026, 11:40:01 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2121
moderation_latency(null)
generation_time37706
tokens_prompt1038
tokens_completion1556
native_tokens_prompt1480
native_tokens_completion1950
native_tokens_completion_images(null)
native_tokens_reasoning47
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"
usage0.05615
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_0192Nt9aijmmSw5cZnn5yENA"
is_byokfalse
latency1076
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-1780227601-AZx4H6Xipe2iiYyXRKap"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1780227601-3bvUi2Tuf8kASTKM3cMU"
upstream_id"msg_0192Nt9aijmmSw5cZnn5yENA"
total_cost0.05615
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
totalTags2
adverbTagCount0
adverbTags(empty)
dialogueSentences7
tagDensity0.286
leniency0.571
rawRatio0
effectiveRatio0
90.37% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1038
totalAiIsmAdverbs2
found
0
adverb"really"
count1
1
adverb"slowly"
count1
highlights
0"really"
1"slowly"
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)
66.28% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1038
totalAiIsms7
found
0
word"silence"
count2
1
word"flickered"
count1
2
word"dancing"
count1
3
word"pulse"
count1
4
word"loomed"
count1
5
word"shattered"
count1
highlights
0"silence"
1"flickered"
2"dancing"
3"pulse"
4"loomed"
5"shattered"
100.00% Cliché density
Target: ≤1 cliche(s) per 800-word window
totalCliches1
maxInWindow1
found
0
label"hung in the air"
count1
highlights
0"hung in the air"
100.00% Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells0
narrationSentences92
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount2
hedgeCount0
narrationSentences92
filterMatches
0"know know"
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences97
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen49
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans1
markdownWords14
totalWords1046
ratio0.013
matches
0"don't. Whatever it is, it's faster than you. Don't let it know you know."
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions6
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions10
wordCount1023
uniqueNames5
maxNameDensity0.49
worstName"Rory"
maxWindowNameDensity1
worstWindowName"London"
discoveredNames
Richmond1
Park1
London2
Heartstone1
Rory5
persons
0"Heartstone"
1"Rory"
places
0"Richmond"
1"Park"
2"London"
globalScore1
windowScore1
50.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences50
glossingSentenceCount2
matches
0"felt like a held breath waiting for her"
1"not quite the sound of laughter"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1046
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences97
matches
0"sworn — that the"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs42
mean24.9
std23.63
cv0.949
sampleLengths
010
166
24
33
433
56
670
769
815
92
101
1148
1256
133
1444
159
1613
1716
183
1950
2011
215
2267
232
2444
257
266
2762
285
2929
302
315
3245
3322
3447
3547
365
377
3857
394
402
4144
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount1
totalSentences92
matches
0"was gone"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount1
totalVerbs171
matches
0"were drinking"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount8
semicolonCount0
flaggedSentences6
totalSentences97
ratio0.062
matches
0"Behind her, Richmond Park had been quiet in the way only a city park managed after midnight — the distant rush of traffic, a fox barking somewhere, the wet sigh of London breathing in its sleep."
1"Wildflowers everywhere — bluebells, foxglove, things she couldn't name that had no business blooming together, never mind in the dead of a London winter."
2"That was the next thing — no crunch, no rustle, just a soft yielding nothing, like stepping on something that had been waiting to be stepped on."
3"And as she moved, she would have sworn — would have put her own hand in fire and sworn — that the birch hadn't been there when she'd first come through the stones."
4"At the edge — that grey margin where vision frays into nothing."
5"Every animal instinct she owned screamed at her to run, and underneath that, a colder voice — her father's courtroom voice, the one that had never once raised itself — said *don't."
94.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1017
adjectiveStacks1
stackExamples
0"lay warm against her"
adverbCount33
adverbRatio0.032448377581120944
lyAdverbCount6
lyAdverbRatio0.0058997050147492625
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences97
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences97
mean10.78
std11.15
cv1.034
sampleLengths
010
118
212
336
44
52
61
71
823
99
103
113
127
1334
146
156
1617
178
1824
193
204
2130
223
233
249
252
261
278
283
2937
304
319
3227
3316
343
354
362
3715
3823
399
4013
412
428
436
443
454
4633
478
485
4911
65.98% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats6
diversityRatio0.4329896907216495
totalSentences97
uniqueOpeners42
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount3
totalSentences73
matches
0"Even a little."
1"Just a young birch, pale-barked,"
2"Slowly, she turned her head."
ratio0.041
77.53% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount26
totalSentences73
matches
0"Her phone's torch threw a"
1"It had been pulsing all"
2"They didn't move."
3"They stood at attention, every"
4"Her voice came out smaller"
5"It didn't carry."
6"It dropped from her mouth"
7"She walked deeper in."
8"She glanced down to check"
9"She shook the phone."
10"She angled it toward the"
11"She breathed out through her"
12"She moved past it."
13"She'd looked at this part"
14"She'd looked right at it."
15"She turned in a slow"
16"She snapped the torch toward"
17"She made herself walk."
18"She kept her eyes forward,"
19"She did not turn around."
ratio0.356
69.59% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount57
totalSentences73
matches
0"The standing stones rose out"
1"Rory ducked between two of"
2"Her phone's torch threw a"
3"Here, none of that."
4"The silence pressed against her"
5"The pendant lay warm against"
6"It had been pulsing all"
7"The Heartstone had brought her"
8"Eva had said to follow"
9"Eva had said a lot"
10"Rory swept the torch in"
11"Wildflowers everywhere — bluebells, foxglove,"
12"They didn't move."
13"They stood at attention, every"
14"Flowers should sway."
15"Her voice came out smaller"
16"It didn't carry."
17"It dropped from her mouth"
18"She walked deeper in."
19"The grass gave under her"
ratio0.781
68.49% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences73
matches
0"Even with her standing right"
ratio0.014
73.73% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences31
technicalSentenceCount3
matches
0"That was the next thing — no crunch, no rustle, just a soft yielding nothing, like stepping on something that had been waiting to be stepped on."
1"The light steadied, then dimmed again, the beam narrowing as though something were drinking it."
2"Her body decided for her, wrenching her around and hurling her toward the treeline where the pendant burned brightest, and the silence shattered behind her into…"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags2
uselessAdditionCount0
matches(empty)
7.14% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags2
fancyCount1
fancyTags
0"she muttered (mutter)"
dialogueSentences7
tagDensity0.286
leniency0.571
rawRatio0.5
effectiveRatio0.286
85.4373%