Run: 2026-05-31-01KSYXPPCXSTHPQVX2PV7HKMPZ

Run Details

Duration:
38.3s
Cost:
$0.058250
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 last train to Richmond had been nearly empty, and Rory had taken that as a kindness. Fewer faces to remember her, fewer questions later if anything went wrong. She'd told no one where she was going. Eva would have called it reckless. Eva would have been right. The note had come folded inside the delivery bag at the Golden Empress, tucked between a receipt and a carton of egg-fried rice, written in a hand she didn't recognize. *Richmond Park. The oaks past the Isabella Plantation. Midnight. Bring the pendant.* No signature. Just the smudge of something that might have been ink and might have been soot. So here she was, past midnight, the gates long closed behind her, picking her way through wet grass that soaked the cuffs of her jeans. The pendant lay cold against her sternum. That was the first thing she noticed, and the first thing that was wrong. It had been warm on the train. Faintly, the way it always was, that small inner heat she'd stopped questioning months ago. Now it had gone cold as a river stone, and the deeper she walked into the dark, the colder it grew. Richmond Park at night was a different animal than the one she knew. By day it was joggers and prams and the distant nodding heads of deer. Now the grass stretched gray and endless under a moon gone thin, and the trees stood in clusters like people who had stopped talking the moment she appeared. She kept to the path she half-remembered, the pendant a small dead weight, and told herself the cold was just the season. She reached the oaks without quite deciding to. They didn't look like the other trees. She knew it the way you know a wrong note in a familiar song — some part of her recognized them before her eyes did. Five of them, vast and ancient, their trunks split and gnarled into shapes that suggested faces if she let them, arranged in a rough ring around a clearing she was certain hadn't been there a moment ago. The standing stones, she thought, though they were wood, not stone. The boundary. The wildflowers were the second thing wrong. They grew thick inside the ring, pale and luminous in the moonlight, and they were blooming. All of them. Foxglove and bluebell and things she had no name for, fat-petaled and trembling, in the dead middle of a London November. The smell of them rolled over her, sweet and heavy and just slightly turned, like fruit a day past ripe. "Hello?" Her voice came out smaller than she wanted. Nothing answered. But the silence had a texture to it, a held-breath quality, and she became aware that she could no longer hear the city. No distant motorway hum. No planes stacking over Heathrow. Nothing but her own pulse and the small wet sounds of the grass settling behind her. She stepped over the threshold of the oaks. The cold of the pendant became a burn. Not warmth — she knew its warmth, had felt it pulse like a second heart more than once — but a deep aching chill that radiated outward through her chest. She pressed her palm flat against it through her jacket and felt it thrumming, fast and irregular, a frightened thing. *Near a portal,* some buried part of her supplied. *It pulses near a portal.* But this wasn't pulsing. This was screaming, in the only language it had. A sound came from across the clearing. It was such a small sound. The brush of fabric, perhaps, or a foot setting down with great care into wet grass. She turned toward it and there was nothing — only the wall of the far oaks, the flowers nodding, the moonlight lying flat and silver across the empty ground. "I got your note," she said. Steadier now. Anger helped. "So here I am. You want to come out, or are we doing this the rude way?" The flowers stilled. All of them, at once, as though a wind had passed — except there was no wind, and the stilling was wrong, because they didn't sway first. They simply stopped, mid-tremble, like a film paused. And in the new and absolute stillness she heard the sound again, closer now, off to her left this time, where she had just been looking and seen nothing. She did not look at it directly. Some animal wisdom kept her eyes forward. But at the edge of her vision, in the soft gray smear where detail failed, something stood among the oaks that had not been standing there before. Tall. Too tall, and too thin, with a stillness that was not the stillness of a person waiting but the stillness of a thing that had never needed to breathe. When she moved her eyes to it, it wasn't there. When she looked away, it was. Rory's mouth had gone dry. The pendant burned against her skin, and she understood, with a clarity that arrived from nowhere and felt like falling, that it had not gone cold to warn her of a portal. It had gone cold because something here was *drinking* its warmth. Something that fed on the small heat of living things, and had been patient enough to write a note in a hand it borrowed, and wait. "You're not who sent the note," she said. Her voice barely carried. "There wasn't anyone. You wrote it yourself." At the edge of her vision, the thing tilted. A long slow incline of where a head should be, as if it were pleased she'd worked it out, as if cleverness were a flavor. The flowers began to bloom again — faster now, the pale petals unfurling in a rush, more and more of them, climbing the trunks of the oaks, and she realized the smell had changed entirely. The sweetness had rotted through. Beneath it lay something cold and mineral, the smell of deep places that never saw the sun. She took one step backward, toward the threshold she'd crossed. The grass did not give beneath her foot. It was as if the ground itself had thickened, had decided to hold her here a little longer, and she remembered, distant and useless, what Eva had told her once about this place. *Time moves differently. An hour inside can be minutes outside. Or days.* The thing at the edge of her sight took a step toward her. She did not see it move. She only knew that the gray smear where it lived had grown nearer, and that the cold in her chest had spread to her fingers, and that somewhere very close, soft as a lover's whisper, something had begun — almost gently — to laugh.
created_at"2026-05-31T11:46:27.881Z" 5/31/2026, 11:46:27 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3121
moderation_latency(null)
generation_time38204
tokens_prompt812
tokens_completion1652
native_tokens_prompt1170
native_tokens_completion2096
native_tokens_completion_images(null)
native_tokens_reasoning60
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"
usage0.05825
router(null)
provider_responses
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endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01J1PyesQQknr3Q1QK4H6zLi"
is_byokfalse
latency1163
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-1780227987-vDbAIJpvStEumJvucmqN"
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api_type"completions"
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upstream_id"msg_01J1PyesQQknr3Q1QK4H6zLi"
total_cost0.05825
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upstream_inference_cost0
provider_name"Anthropic"
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Evaluation details

Result Evaluator Details Meta Data
100.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags3
adverbTagCount0
adverbTags(empty)
dialogueSentences5
tagDensity0.6
leniency1
rawRatio0
effectiveRatio0
86.64% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1123
totalAiIsmAdverbs3
found
0
adverb"slightly"
count1
1
adverb"very"
count1
2
adverb"gently"
count1
highlights
0"slightly"
1"very"
2"gently"
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)
55.48% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1123
totalAiIsms10
found
0
word"weight"
count1
1
word"familiar"
count1
2
word"silence"
count1
3
word"pulse"
count2
4
word"warmth"
count3
5
word"chill"
count1
6
word"whisper"
count1
highlights
0"weight"
1"familiar"
2"silence"
3"pulse"
4"warmth"
5"chill"
6"whisper"
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
narrationSentences83
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount1
hedgeCount1
narrationSentences83
filterMatches
0"know"
hedgeMatches
0"began to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences85
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen42
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans5
markdownWords33
totalWords1131
ratio0.029
matches
0"Richmond Park. The oaks past the Isabella Plantation. Midnight. Bring the pendant."
1"Near a portal,"
2"It pulses near a portal."
3"drinking"
4"Time moves differently. An hour inside can be minutes outside. Or days."
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions5
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions18
wordCount1096
uniqueNames12
maxNameDensity0.27
worstName"Richmond"
maxWindowNameDensity1.5
worstWindowName"Richmond"
discoveredNames
Richmond3
Rory2
Golden1
Empress1
Park2
Isabella1
Plantation1
London1
November1
Heathrow1
Steadier1
Eva3
persons
0"Rory"
1"Empress"
2"Eva"
places
0"Richmond"
1"Golden"
2"Park"
3"Isabella"
4"Plantation"
5"London"
globalScore1
windowScore1
70.63% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences63
glossingSentenceCount2
matches
0"felt like falling, that it had not gone"
1"It was as if the ground itself had thickened, had decided to hold her here a little longer, and she remembered, distant and useless, what Eva had told her once about this place"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.884
wordCount1131
matches
0"not the stillness of a person waiting but the stillness of a thing"
88.24% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount2
totalSentences85
matches
0"falling, that it"
1"knew that the"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs29
mean39
std25.11
cv0.644
sampleLengths
048
159
246
343
477
58
682
77
860
99
1050
118
1258
1327
147
1551
1627
173
1864
1971
2010
216
2274
2319
2434
2557
2663
2713
2850
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount1
totalSentences83
matches
0"were pleased"
0.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount5
totalVerbs165
matches
0"was going"
1"were blooming"
2"wasn't pulsing"
3"was screaming"
4"was *drinking"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount8
semicolonCount0
flaggedSentences6
totalSentences85
ratio0.071
matches
0"She knew it the way you know a wrong note in a familiar song — some part of her recognized them before her eyes did."
1"Not warmth — she knew its warmth, had felt it pulse like a second heart more than once — but a deep aching chill that radiated outward through her chest."
2"She turned toward it and there was nothing — only the wall of the far oaks, the flowers nodding, the moonlight lying flat and silver across the empty ground."
3"All of them, at once, as though a wind had passed — except there was no wind, and the stilling was wrong, because they didn't sway first."
4"The flowers began to bloom again — faster now, the pale petals unfurling in a rush, more and more of them, climbing the trunks of the oaks, and she realized the smell had changed entirely."
5"She only knew that the gray smear where it lived had grown nearer, and that the cold in her chest had spread to her fingers, and that somewhere very close, soft as a lover's whisper, something had begun — almost gently — to laugh."
83.77% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1093
adjectiveStacks2
stackExamples
0"long closed behind her,"
1"lay cold against her"
adverbCount49
adverbRatio0.04483074107959744
lyAdverbCount12
lyAdverbRatio0.010978956999085087
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences85
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences85
mean13.31
std10.02
cv0.753
sampleLengths
017
112
28
36
45
530
62
76
81
95
1015
1125
127
1314
147
1515
1621
1713
1814
1928
2022
218
227
2325
2437
2511
262
277
2816
293
3021
3120
329
332
3423
354
365
3716
388
398
4030
4120
429
439
449
457
466
4716
4829
496
76.86% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats8
diversityRatio0.5176470588235295
totalSentences85
uniqueOpeners44
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount3
totalSentences73
matches
0"Just the smudge of something"
1"Faintly, the way it always"
2"Too tall, and too thin,"
ratio0.041
100.00% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount21
totalSentences73
matches
0"She'd told no one where"
1"It had been warm on"
2"She kept to the path"
3"She reached the oaks without"
4"They didn't look like the"
5"She knew it the way"
6"They grew thick inside the"
7"Her voice came out smaller"
8"She stepped over the threshold"
9"She pressed her palm flat"
10"*It pulses near a portal.*"
11"It was such a small"
12"She turned toward it and"
13"They simply stopped, mid-tremble, like"
14"She did not look at"
15"It had gone cold because"
16"Her voice barely carried."
17"She took one step backward,"
18"It was as if the"
19"She did not see it"
ratio0.288
100.00% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount49
totalSentences73
matches
0"The last train to Richmond"
1"She'd told no one where"
2"Eva would have called it"
3"Eva would have been right."
4"The note had come folded"
5"The oaks past the Isabella"
6"The pendant lay cold against"
7"That was the first thing"
8"It had been warm on"
9"Richmond Park at night was"
10"She kept to the path"
11"She reached the oaks without"
12"They didn't look like the"
13"She knew it the way"
14"The standing stones, she thought,"
15"The wildflowers were the second"
16"They grew thick inside the"
17"Foxglove and bluebell and things"
18"The smell of them rolled"
19"Her voice came out smaller"
ratio0.671
100.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount2
totalSentences73
matches
0"Now it had gone cold"
1"Now the grass stretched gray"
ratio0.027
32.97% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences39
technicalSentenceCount6
matches
0"So here she was, past midnight, the gates long closed behind her, picking her way through wet grass that soaked the cuffs of her jeans."
1"Now the grass stretched gray and endless under a moon gone thin, and the trees stood in clusters like people who had stopped talking the moment she appeared."
2"But at the edge of her vision, in the soft gray smear where detail failed, something stood among the oaks that had not been standing there before."
3"Too tall, and too thin, with a stillness that was not the stillness of a person waiting but the stillness of a thing that had never needed to breathe."
4"The pendant burned against her skin, and she understood, with a clarity that arrived from nowhere and felt like falling, that it had not gone cold to warn her o…"
5"It was as if the ground itself had thickened, had decided to hold her here a little longer, and she remembered, distant and useless, what Eva had told her once …"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags3
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags2
fancyCount0
fancyTags(empty)
dialogueSentences5
tagDensity0.4
leniency0.8
rawRatio0
effectiveRatio0
86.4864%