Run: 2026-06-01-01KT1H2J6MHGMTMJY7K8K387ES

Run Details

Duration:
40.6s
Cost:
$0.059850
Provider:
Anthropic

Model input

System
You are an expert novelist with a gift for vivid, immersive prose. You write in tight third-person limited point of view with a strong narrative voice. Your prose is clean, precise, and engaging — you favor strong verbs, concrete details, and natural-sounding dialogue. You will be given a story bible (codex) containing canonical details about characters, locations, items, and lore. Use these details to ground your writing in the established world. Stay consistent with the codex. Write only the prose of the scene. Do not include titles, chapter headings, markdown formatting, or any commentary before or after the scene.
User/Human
<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> 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.

Model response

AI
The standing stones came up out of the dark like teeth. Rory had counted on them being smaller. In the photograph Eva had sent — blurry, taken at dusk, the only proof that the place existed at all — the oaks looked no taller than fenceposts, a ragged half-circle in the long grass of Richmond Park. In person they loomed. Grey-barked, lightning-split, leaning toward one another as if conspiring. She stood between two of them with her torch held low and felt, absurdly, that she had crossed a threshold she could not uncross. She told herself that was nonsense. It was a park. London hummed somewhere beyond the trees — she could still hear the faint drone of the South Circular, a siren threading thin and far away. People walked dogs here. Children flew kites. There was nothing in Richmond Park at half-eleven on a Tuesday but foxes and the occasional drunk. But the grass past the stones was wrong. It took her a moment to place it. The torch beam slid across the clearing and caught wildflowers — bluebells, foxgloves, a spill of poppies red as arterial blood — all blooming together, all at once, in the dead middle of November. Petals heavy with dew. The cold air carried the smell of them, thick and sweet, almost rotten at the edges, like a perfume counter in a heatwave. Rory stopped walking. "Eva," she said. Her voice came out smaller than she meant it to. "Eva, if this is a joke—" It wasn't a joke. Eva didn't joke about this. Eva had grown pale and serious on the phone two nights ago, had said meet me at the grove, I found something, and then had not turned up, and had not answered her phone, and had not been seen by anyone Rory could find. So Rory had come. Of course she had come. That was the whole shape of their friendship, going back twenty years: Eva leapt, and Rory followed to catch her. The clearing was empty. She swept the torch in a slow circle. Grass, flowers, the dark wall of trees, the leaning stones behind her. No Eva. No bag, no torch of her own, no sign that anyone had stood here in a hundred years. Beneath her shirt, against her sternum, the pendant grew warm. She'd almost forgotten it was there. The Heartstone — that was what the note had called it, in handwriting she didn't recognise, left on her doormat three weeks ago wrapped in brown paper. A crimson stone the size of her thumbnail on a fine silver chain. She'd worn it because it was beautiful and because she had nothing else to wear it with, and because some part of her, the part she didn't examine too closely, had felt safer with it against her skin. Now it pulsed. A slow, deliberate warmth, like a second heartbeat keeping time slightly out of step with her own. Rory drew it out from under her collar. The stone glowed — not torchlight reflected, but an inner light, dull and red, brightening and fading, brightening and fading. She had never seen it do that. Her thumb pressed against it and felt the heat answer her, and something cold uncoiled at the base of her spine. A sound, behind her. She turned. Nothing. The torch found only the standing stones and the gap between them through which she'd come — except the gap looked narrower now, the two oaks closer together than she remembered, and beyond them was not the open grass of the park sloping down toward the road but a darkness so complete it seemed to drink the beam of her torch and give nothing back. "Right," she whispered. "Right. Okay." Cool head. That was what people said about her. Rory thinks her way out. Rory doesn't panic. She made herself breathe, made herself name the facts. The temperature had dropped. The siren had stopped — when had it stopped? She strained to hear the road and heard nothing at all, no traffic, no wind, no rustle of branches, only a silence so total it pressed against her eardrums like depth underwater. And then, into that silence, a voice. "Rory." Eva's voice. From the treeline, to her left. Relief surged up so fast it made her dizzy. "Eva—" She swung the torch toward the trees, already stepping forward, and the beam lit nothing. The voice had come from there. She was certain of it. The exact pitch of it, the way Eva leaned on the second syllable, Ror-ee, the way she'd said it across school playgrounds and university bars and the wreckage of the night Rory finally left Evan. "Eva, where are you?" "Rory." Behind her now. The same voice, the same word, the same warmth. She spun. The clearing was empty. The flowers nodded in a wind she couldn't feel. The pendant was scalding now, hot enough that she nearly dropped it, the red glow throbbing fast and frantic, and she understood with a lurch of pure animal certainty that the warmth was not comfort. It was a warning. It had been a warning all along. The note, the gift, the unknown hand — someone had wanted her to know when she was close to something. And she was close to it now. She was standing inside it. "Rory," said the voice, from everywhere, and it was almost right. That was the worst part. It was almost exactly Eva, and the small wrongness in it — a flatness, a faint delay, like a recording of a recording — was somehow more horrible than a thing that sounded nothing like her friend at all. Something moved at the edge of the torchlight. She didn't look directly. She'd learned that much from a childhood of half-glimpsed terrors — that the things at the periphery vanished when you faced them. So she held the beam steady on the grass ahead and watched the dark with the corners of her eyes, and there: a shape. Tall, thin, the suggestion of shoulders, standing among the leaning stones where the path out should have been. Not moving. Patient. The way you stood when you had all the time in the world, when time itself bent around you and an hour could be a minute or a year. The flowers had stopped nodding. The wind had stopped. Everything had stopped except the pendant, hammering against her chest like it wanted out, and Rory's own breath, loud and ragged in the dead air. "You're not her," she said. The shape among the stones tilted its head. "Rory," it said, in Eva's voice, and smiled — she could hear the smile in it, the wet shape of it forming around her name — and took one slow step into the clearing toward her. She ran.
created_at"2026-06-01T12:03:28.6Z" 6/1/2026, 12:03:28 PM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3025
moderation_latency(null)
generation_time40603
tokens_prompt812
tokens_completion1681
native_tokens_prompt1170
native_tokens_completion2160
native_tokens_completion_images(null)
native_tokens_reasoning53
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"
usage0.05985
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_014La1LEgZGyiJZyrAGD8acs"
is_byokfalse
latency1411
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-1780315408-gcwfUTjPDdCkFElwnY0e"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1780315408-dUJye38Ao7K2PvyDaNa6"
upstream_id"msg_014La1LEgZGyiJZyrAGD8acs"
total_cost0.05985
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
totalTags6
adverbTagCount0
adverbTags(empty)
dialogueSentences11
tagDensity0.545
leniency1
rawRatio0
effectiveRatio0
95.56% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1125
totalAiIsmAdverbs1
found
0
adverb"slightly"
count1
highlights
0"slightly"
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)
64.44% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1125
totalAiIsms8
found
0
word"loomed"
count1
1
word"pulsed"
count1
2
word"warmth"
count3
3
word"silence"
count2
4
word"lurch"
count1
highlights
0"loomed"
1"pulsed"
2"warmth"
3"silence"
4"lurch"
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
narrationSentences92
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount1
narrationSentences92
filterMatches(empty)
hedgeMatches
0"seemed 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
maxSentenceWordsSeen64
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1140
ratio0
matches(empty)
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
totalMentions31
wordCount1118
uniqueNames12
maxNameDensity0.89
worstName"Rory"
maxWindowNameDensity2
worstWindowName"Eva"
discoveredNames
Eva9
Richmond2
Park2
South1
Circular1
Tuesday1
November1
Rory10
Heartstone1
Cool1
Ror-ee1
Evan1
persons
0"Eva"
1"Rory"
2"Evan"
places
0"Richmond"
1"Park"
globalScore1
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences55
glossingSentenceCount1
matches
0"as if conspiring"
24.56% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches2
per1kWords1.754
wordCount1140
matches
0"not torchlight reflected, but an inner light, dull"
1"not the open grass of the park sloping down toward the road but a darkness so complete it seemed to drink the beam of her to"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences96
matches
0"learned that much"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs34
mean33.53
std31.3
cv0.934
sampleLengths
011
182
259
38
469
53
619
782
84
940
1010
1184
1220
1356
144
1568
165
1771
187
191
208
2171
224
2313
2415
2578
2655
278
28100
2934
305
318
3236
332
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount1
totalSentences92
matches
0"been seen"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount2
totalVerbs173
matches
0"was scalding"
1"was standing"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount15
semicolonCount0
flaggedSentences11
totalSentences96
ratio0.115
matches
0"In the photograph Eva had sent — blurry, taken at dusk, the only proof that the place existed at all — the oaks looked no taller than fenceposts, a ragged half-circle in the long grass of Richmond Park."
1"London hummed somewhere beyond the trees — she could still hear the faint drone of the South Circular, a siren threading thin and far away."
2"The torch beam slid across the clearing and caught wildflowers — bluebells, foxgloves, a spill of poppies red as arterial blood — all blooming together, all at once, in the dead middle of November."
3"The Heartstone — that was what the note had called it, in handwriting she didn't recognise, left on her doormat three weeks ago wrapped in brown paper."
4"The stone glowed — not torchlight reflected, but an inner light, dull and red, brightening and fading, brightening and fading."
5"The torch found only the standing stones and the gap between them through which she'd come — except the gap looked narrower now, the two oaks closer together than she remembered, and beyond them was not the open grass of the park sloping down toward the road but a darkness so complete it seemed to drink the beam of her torch and give nothing back."
6"The siren had stopped — when had it stopped?"
7"The note, the gift, the unknown hand — someone had wanted her to know when she was close to something."
8"It was almost exactly Eva, and the small wrongness in it — a flatness, a faint delay, like a recording of a recording — was somehow more horrible than a thing that sounded nothing like her friend at all."
9"She'd learned that much from a childhood of half-glimpsed terrors — that the things at the periphery vanished when you faced them."
10"\"Rory,\" it said, in Eva's voice, and smiled — she could hear the smile in it, the wet shape of it forming around her name — and took one slow step into the clearing toward her."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1109
adjectiveStacks0
stackExamples(empty)
adverbCount35
adverbRatio0.031559963931469794
lyAdverbCount10
lyAdverbRatio0.009017132551848512
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
mean11.88
std11.94
cv1.006
sampleLengths
011
17
238
34
49
524
66
74
825
94
103
1117
128
138
1434
154
1623
173
183
1910
206
214
225
2344
244
255
2620
274
288
2912
302
3118
3210
336
3427
3513
3638
373
3817
398
4020
417
4221
434
442
451
4665
473
482
492
45.49% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats13
diversityRatio0.3541666666666667
totalSentences96
uniqueOpeners34
41.67% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount1
totalSentences80
matches
0"Of course she had come."
ratio0.013
100.00% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount22
totalSentences80
matches
0"She stood between two of"
1"She told herself that was"
2"It was a park."
3"It took her a moment"
4"Her voice came out smaller"
5"It wasn't a joke."
6"She swept the torch in"
7"She'd almost forgotten it was"
8"She'd worn it because it"
9"She had never seen it"
10"Her thumb pressed against it"
11"She made herself breathe, made"
12"She strained to hear the"
13"She swung the torch toward"
14"She was certain of it."
15"It was a warning."
16"It had been a warning"
17"She was standing inside it."
18"It was almost exactly Eva,"
19"She didn't look directly."
ratio0.275
66.25% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount63
totalSentences80
matches
0"The standing stones came up"
1"Rory had counted on them"
2"She stood between two of"
3"She told herself that was"
4"It was a park."
5"London hummed somewhere beyond the"
6"People walked dogs here."
7"Children flew kites."
8"It took her a moment"
9"The torch beam slid across"
10"Petals heavy with dew."
11"The cold air carried the"
12"Rory stopped walking."
13"Her voice came out smaller"
14"It wasn't a joke."
15"Eva didn't joke about this."
16"Eva had grown pale and"
17"That was the whole shape"
18"The clearing was empty."
19"She swept the torch in"
ratio0.788
62.50% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences80
matches
0"Now it pulsed."
ratio0.013
73.73% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences31
technicalSentenceCount3
matches
0"Grey-barked, lightning-split, leaning toward one another as if conspiring."
1"The Heartstone — that was what the note had called it, in handwriting she didn't recognise, left on her doormat three weeks ago wrapped in brown paper."
2"It was almost exactly Eva, and the small wrongness in it — a flatness, a faint delay, like a recording of a recording — was somehow more horrible than a thing t…"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags6
uselessAdditionCount0
matches(empty)
59.09% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags5
fancyCount1
fancyTags
0"she whispered (whisper)"
dialogueSentences11
tagDensity0.455
leniency0.909
rawRatio0.2
effectiveRatio0.182
84.4429%