Run: 2026-06-01-01KT1HV2DTA5RZF3PBJTNX49R2

Run Details

Duration:
36.0s
Cost:
$0.055775
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 loomed out of the dark before Rory saw the path, six ancient oaks worn smooth by centuries, their bark grey as old bone under the moon. She'd left her bike chained to a railing at the Richmond Park gate forty minutes ago. The walk should have taken twenty. She checked her phone. No signal. The time read 11:47, then blinked and read 11:47 again. "Right," she said to no one. "That's not unsettling at all." The pendant lay warm against her sternum. Not the gentle warmth it gave off near a portal, the one that felt like a coin left in sunlight. This was a deeper heat, a slow pulse that matched her own pulse and then, somewhere between one breath and the next, fell out of step with it. She pressed her palm flat against it through her jumper and felt the crimson stone throb under the cloth like something with a heartbeat of its own. Eva had told her to come here. *Wait for me by the oaks,* the message had said, *I'll explain everything.* That had been two hours ago. Rory had read it three times on the train, certain each time that the words had shifted slightly, that the spelling of her friend's name had been wrong and then corrected itself. She stepped between the stones. The air changed. Outside the ring, November had stripped the park to mud and bare branches and the far-off orange smear of London's light pollution. Inside, the grass stood lush and green, and wildflowers nodded in a breeze she couldn't feel on her skin. Foxgloves, she thought, and something pale that she didn't have a name for, petals folded shut against the night. The clearing opened ahead of her, ringed in trees, and the moon hung directly overhead though it had been low and behind her at the gate. "Eva?" Her voice didn't carry. It dropped at her feet like a stone into water, no echo, no answer. She walked to the centre of the clearing and stopped. The silence had a texture to it. Not the absence of sound but the presence of something holding its breath, a held note just below hearing that made her teeth ache. She turned a slow circle. Trees, flowers, the bright cruel disc of the moon. Nothing else. Then, from the treeline to her left, a sound. Small. A wet click, like a tongue against the roof of a mouth. She spun toward it. The flowers there swayed, settling, as if something had passed through them. "Hello?" Click. To her right this time. She turned again, slower, and caught movement at the very edge of where her eyes could reach, a shape that wasn't there when she looked at it directly. Tall. Thin. Gone the instant her gaze landed on it, dissolved back into the gaps between the trunks. The pendant burned now, hot enough that she flinched and pulled the chain away from her skin. The crimson glow had brightened, casting a faint red wash up under her chin. In its light she saw her own breath fog the air. Cold. When had it gone cold? The flowers still bloomed as if it were June, but her exhale hung white in front of her face and she could no longer feel her fingers. "Okay," she whispered. "Eva's not here. I'm leaving." She made for the stones. The gap she'd come through stood twenty feet away, the dark of the ordinary park visible between two oaks like a doorway. She walked toward it. The grass dragged at her ankles, longer than it had been, tangling. The doorway didn't get closer. She stopped. Looked down. Her own footprints pressed into the dewy grass behind her, a neat line, and the stones stood exactly twenty feet ahead, no nearer for all her walking. The click came again. Directly behind her now, close, at the height of her ear. She didn't turn. Every animal part of her brain screamed not to turn, that turning was what it wanted, that the thing standing at her back was patient and had been patient for a very long time and would wait as long as she made it wait. She felt warmth against her nape that had nothing to do with the pendant. Breath. Slow and deliberate, stirring the small hairs there. "You're not Eva," she said. Her voice came out steady. She didn't know how. The breathing stopped. In the silence that followed she heard, faint and far away and unmistakably wrong, a voice using Eva's exact cadence. *Wait for me by the oaks.* The same words. The same warmth in them. But underneath the warmth ran something else, a second voice layered beneath the first, speaking the same words a half-beat behind, and that voice was old and dry and amused. Rory moved. She didn't run for the stones. She ran for the foxgloves, because the foxgloves had moved when the thing passed and she wanted to know which way it had gone, wanted anything between her and the breathing. She crashed through the flowers and the moon went out. Not a cloud. The disc simply vanished, snuffed, and the clearing dropped into a black so total she couldn't see her own hands. Only the pendant remained, a single coal of red light at her chest, and in its glow she saw the grass at her feet, the green gone grey, the flowers shut tight, and a long pale shape lying among them that she had walked straight toward. It was the length of a person. It did not breathe. As the red light touched it she saw that it was made of the same pale petals as the unnamed flowers, folded over and over into the suggestion of limbs, a torso, a face turned up toward where the moon had been. The face had no features. Only a smooth folded blank, waiting. The pendant pulsed once, hard, and in that single throb of light the blank face opened its eyes. They were Eva's eyes. "There you are," it said, in two voices, and behind her, all around her, the wet clicking started up again, dozens of them now, a tide of small soft sounds closing in from every dark edge of the clearing at once.
created_at"2026-06-01T12:16:51.648Z" 6/1/2026, 12:16:51 PM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2818
moderation_latency(null)
generation_time35945
tokens_prompt1038
tokens_completion1519
native_tokens_prompt1480
native_tokens_completion1935
native_tokens_completion_images(null)
native_tokens_reasoning41
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"
usage0.055775
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01KpDBXiF7ciZPSrFsvYcxBK"
is_byokfalse
latency1350
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-1780316211-MyI149YawuOksdh7vEZO"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1780316211-E37svQZj6RtWNTqIwvCm"
upstream_id"msg_01KpDBXiF7ciZPSrFsvYcxBK"
total_cost0.055775
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)
dialogueSentences8
tagDensity0.5
leniency1
rawRatio0
effectiveRatio0
85.74% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1052
totalAiIsmAdverbs3
found
0
adverb"slightly"
count1
1
adverb"very"
count2
highlights
0"slightly"
1"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)
38.21% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1052
totalAiIsms13
found
0
word"loomed"
count1
1
word"warmth"
count4
2
word"pulse"
count2
3
word"throb"
count2
4
word"echo"
count1
5
word"silence"
count2
6
word"pulsed"
count1
highlights
0"loomed"
1"warmth"
2"pulse"
3"throb"
4"echo"
5"silence"
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
narrationSentences84
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount0
narrationSentences84
filterMatches(empty)
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences88
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen46
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans3
markdownWords15
totalWords1052
ratio0.014
matches
0"Wait for me by the oaks,"
1"I'll explain everything."
2"Wait for me by the oaks."
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
totalMentions11
wordCount1032
uniqueNames7
maxNameDensity0.29
worstName"Rory"
maxWindowNameDensity1
worstWindowName"Rory"
discoveredNames
Rory3
Richmond1
Park1
November1
London1
June1
Eva3
persons
0"Rory"
1"November"
2"Eva"
places
0"Richmond"
1"Park"
2"London"
globalScore1
windowScore1
98.98% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences49
glossingSentenceCount1
matches
0"felt like a coin left in sunlight"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.951
wordCount1052
matches
0"Not the absence of sound but the presence of something holding its breath, a held note ju"
53.03% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount3
totalSentences88
matches
0"turn, that turning wanted, that the"
1"saw that it"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs30
mean35.07
std27.51
cv0.784
sampleLengths
051
116
211
382
458
55
689
71
818
957
1022
1116
121
131
1451
1575
168
1748
1831
1915
2070
2114
223
2364
2449
2569
2664
2718
284
2941
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount1
totalSentences84
matches
0"was made"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount0
totalVerbs166
matches(empty)
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount0
semicolonCount0
flaggedSentences0
totalSentences88
ratio0
matches(empty)
88.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1034
adjectiveStacks2
stackExamples
0"lay warm against her"
1"far-off orange smear"
adverbCount35
adverbRatio0.033849129593810444
lyAdverbCount9
lyAdverbRatio0.008704061895551257
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences88
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences88
mean11.95
std11.05
cv0.924
sampleLengths
029
116
26
34
42
510
66
75
87
920
1028
1127
127
1319
1432
155
163
1722
1819
1919
2026
211
224
2314
2410
257
2624
275
289
292
309
311
3212
334
3412
351
361
375
3828
391
401
4116
4217
4314
4411
451
465
4727
483
495
71.97% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats5
diversityRatio0.4659090909090909
totalSentences88
uniqueOpeners41
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount4
totalSentences71
matches
0"Then, from the treeline to"
1"Directly behind her now, close,"
2"Only the pendant remained, a"
3"Only a smooth folded blank,"
ratio0.056
79.15% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount25
totalSentences71
matches
0"She'd left her bike chained"
1"She checked her phone."
2"she said to no one"
3"She pressed her palm flat"
4"She stepped between the stones."
5"Her voice didn't carry."
6"It dropped at her feet"
7"She walked to the centre"
8"She turned a slow circle."
9"She spun toward it."
10"She turned again, slower, and"
11"She made for the stones."
12"She walked toward it."
13"Her own footprints pressed into"
14"She didn't turn."
15"She felt warmth against her"
16"Her voice came out steady."
17"She didn't know how."
18"She didn't run for the"
19"She ran for the foxgloves,"
ratio0.352
93.80% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount52
totalSentences71
matches
0"The standing stones loomed out"
1"She'd left her bike chained"
2"The walk should have taken"
3"She checked her phone."
4"The time read 11:47, then"
5"she said to no one"
6"The pendant lay warm against"
7"This was a deeper heat,"
8"She pressed her palm flat"
9"Eva had told her to"
10"Rory had read it three"
11"She stepped between the stones."
12"The air changed."
13"Foxgloves, she thought, and something"
14"The clearing opened ahead of"
15"Her voice didn't carry."
16"It dropped at her feet"
17"She walked to the centre"
18"The silence had a texture"
19"She turned a slow circle."
ratio0.732
70.42% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences71
matches
0"To her right this time."
ratio0.014
65.64% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences37
technicalSentenceCount4
matches
0"This was a deeper heat, a slow pulse that matched her own pulse and then, somewhere between one breath and the next, fell out of step with it."
1"Not the absence of sound but the presence of something holding its breath, a held note just below hearing that made her teeth ache."
2"She felt warmth against her nape that had nothing to do with the pendant."
3"In the silence that followed she heard, faint and far away and unmistakably wrong, a voice using Eva's exact cadence."
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags4
uselessAdditionCount0
matches(empty)
25.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags4
fancyCount1
fancyTags
0"she whispered (whisper)"
dialogueSentences8
tagDensity0.5
leniency1
rawRatio0.25
effectiveRatio0.25
88.9984%