Run: 2026-05-31-01KSYXJXTHSZ6CGMVKQ71F8098

Run Details

Duration:
39.3s
Cost:
$0.058925
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 before Rory expected them, pale and crooked against a sky the wrong shade of blue. She stopped at the threshold. The text had said to come alone, to come after sunset, to wait at the grove. No signature, just an address that wasn't an address—a string of words that her phone refused to map until she'd already walked half of Richmond Park and stumbled onto the line of ancient oaks half-swallowed by ivy. Now she stood between two of them, and the air on the far side hung still and warm, though October had been chewing at the city all week. The Heartstone lay against her sternum, cool through her shirt. She pressed two fingers to it out of habit and felt nothing. No warmth, no pulse. Whatever it sensed, it didn't sense it here. "Hello?" Her voice went out and didn't come back. No echo, no answer. Just the soft give of grass underfoot as she stepped through. Inside, the grove was beautiful in a way that made her teeth ache. Wildflowers crowded the clearing—foxgloves and bluebells and things she had no names for, all of them blooming as though it were the height of June, all of them faintly luminous, as if they'd drunk down a day's worth of sun and were giving it back in the dark. The grass was the deep wet green of early summer. Overhead, stars she didn't recognize wheeled in patterns that didn't match the London she'd left fifteen minutes' walk behind her. Fifteen minutes. She checked her phone. The screen showed no signal, no time, just a frozen clock reading 8:47, the same as when she'd entered the park. She locked it, unlocked it. Still 8:47. "Right," she said softly. "Of course." She'd been warned about this place, or places like it. Silas had said, once, with the particular flatness he used when he wasn't joking, that some doors in this city didn't open onto rooms. She hadn't asked what he meant. She was beginning to wish she had. Rory picked a spot near the center of the clearing, where a flat grey stone sat low in the grass like a fallen altar, and she sat on it, and she waited. That was the instruction. Wait. She tucked her knees up and watched the tree line and tried to ignore the slow, creeping certainty that the message had not come from a friend. The first wrongness was the quiet. It took her a while to notice it, the way you don't notice you've stopped breathing until your chest starts to burn. There were no insects. No nightjar, no distant traffic hum, no aeroplane dragging its red light across the sky. A grove this thick with summer flowers should have been thrumming with life—moths, at the very least, fumbling at the glowing blooms. There was nothing. The silence had a texture to it, a pressure, like a held breath behind glass. And then, very faintly, there was singing. She turned her head. It came from the far side of the clearing, past the densest stand of foxgloves, low and wordless and sweet—a woman's voice, or close to one, threading a melody that almost resolved into something she knew, a lullaby, maybe, the sort her mother used to hum over the washing-up. She felt herself lean toward it before she caught herself. "I can hear you," Rory called. "You don't have to hide." The singing stopped. The silence that rushed back in was worse than before, because now it was a silence that had been interrupted, a silence that knew she was listening. She kept her eyes on the spot where the voice had come from. The foxgloves swayed, though there was no wind, and for an instant—just an instant—she thought she saw something pale move low among the stems, the curve of a shoulder, the line of a back, there and then not, the way an after-image swims when you've looked too long at a light. Her mouth had gone dry. She made herself sit still. Movement drew the eye, and she did not want to be looked at by whatever was out there at the edge of the flowers. A breeze finally came, and it carried a smell—not the green sweetness she'd have expected from a meadow but something underneath it, faint and meaty and turned, the smell of a fridge after a power cut. It rolled over her and was gone. The stars overhead had shifted. Not drifted, the way stars should over an hour—shifted, lurched, as if the whole sky had been a painted ceiling and someone had nudged the canvas. She looked down quickly. Looking up made her stomach swim. "Whoever sent the message," she said, and was annoyed at the thinness in her own voice, "I'm here. I'd like to know what you want." A sound answered her this time. Not the singing. A footstep, in the grass, behind her. She did not turn around. Every animal nerve in her body screamed to turn around and she did not, because she understood, with a clarity that arrived from somewhere deeper than thought, that turning around was what it wanted, that it was waiting just out of sight for her to give it her eyes, her attention, her acknowledgment, and that the moment she did, some rule older than her would be satisfied, some door would finish opening. Another step. Closer. The grass gave under a weight. She could hear it breathing now—slow, wet, patient, the breath of something that had all the time it could ever need and knew it. The Heartstone, against her chest, came suddenly and terribly to life. It flared with heat, a sudden ember pressed to her breastbone, pulsing—once, twice, hard and fast as a frightened heart. Near a Hel portal, Dymas had said, the only true thing she'd ever gotten out of him. It pulses near a Hel portal. It had been silent the whole time she'd sat here. Which meant the door hadn't been open when she arrived. Which meant it was opening now, behind her, in the dark beyond the flowers, where the singing had been, where the footsteps were, where the breathing waited for her to turn and look and let it in. Rory closed her hand around the burning stone, fixed her eyes on the standing stones at the threshold she'd come through—still there, still real, fifteen minutes and a whole world away—and very slowly, without turning around, she got to her feet. Behind her, the breathing stopped. And the voice that had been singing said, in a tone of mild, almost loving disappointment, so close now that she felt the breath of it stir the hair at the back of her neck: "You weren't supposed to bring that."
created_at"2026-05-31T11:44:24.415Z" 5/31/2026, 11:44:24 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2666
moderation_latency(null)
generation_time38941
tokens_prompt812
tokens_completion1680
native_tokens_prompt1170
native_tokens_completion2123
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"
usage0.058925
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_016SNeByhVBQ2FDS3U3ppBer"
is_byokfalse
latency1118
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-1780227864-gMtYsWatlFdSjJh7aAV4"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1780227864-obk89GV7LCdiefLcEAUU"
upstream_id"msg_016SNeByhVBQ2FDS3U3ppBer"
total_cost0.058925
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
0.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags5
adverbTagCount1
adverbTags
0"she said softly [softly]"
dialogueSentences7
tagDensity0.714
leniency1
rawRatio0.2
effectiveRatio0.2
69.59% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1151
totalAiIsmAdverbs7
found
0
adverb"softly"
count1
1
adverb"very"
count3
2
adverb"quickly"
count1
3
adverb"suddenly"
count1
4
adverb"slowly"
count1
highlights
0"softly"
1"very"
2"quickly"
3"suddenly"
4"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)
47.87% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1151
totalAiIsms12
found
0
word"warmth"
count1
1
word"pulse"
count1
2
word"echo"
count1
3
word"silence"
count4
4
word"resolved"
count1
5
word"lurched"
count1
6
word"stomach"
count1
7
word"weight"
count1
8
word"footsteps"
count1
highlights
0"warmth"
1"pulse"
2"echo"
3"silence"
4"resolved"
5"lurched"
6"stomach"
7"weight"
8"footsteps"
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
narrationSentences75
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount2
narrationSentences75
filterMatches(empty)
hedgeMatches
0"tried to"
1"starts to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences78
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen72
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1139
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
totalMentions15
wordCount1103
uniqueNames10
maxNameDensity0.36
worstName"Rory"
maxWindowNameDensity1
worstWindowName"Hel"
discoveredNames
Rory4
Richmond1
Park1
October1
Heartstone2
June1
London1
Fifteen1
Hel2
Dymas1
persons
0"Rory"
1"October"
2"Dymas"
places
0"Richmond"
1"Park"
2"London"
3"Hel"
globalScore1
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences51
glossingSentenceCount0
matches(empty)
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.878
wordCount1139
matches
0"not the green sweetness she'd have expected from a meadow but something underneath it, faint"
81.20% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount2
totalSentences78
matches
0"joking, that some"
1"wanted, that it"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs32
mean35.59
std26.84
cv0.754
sampleLengths
024
186
234
324
491
534
66
747
864
96
1081
117
1263
1311
143
1591
1634
1743
1841
1925
2016
2177
2233
2311
2443
2510
2610
2737
2841
295
3035
316
86.55% Passive voice overuse
Target: ≤2% passive sentences
passiveCount4
totalSentences75
matches
0"been warned"
1"been interrupted"
2"was gone"
3"was annoyed"
0.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount7
totalVerbs189
matches
0"were giving"
1"wasn't joking"
2"was beginning"
3"was singing"
4"was listening"
5"was waiting"
6"was opening"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount12
semicolonCount0
flaggedSentences10
totalSentences78
ratio0.128
matches
0"No signature, just an address that wasn't an address—a string of words that her phone refused to map until she'd already walked half of Richmond Park and stumbled onto the line of ancient oaks half-swallowed by ivy."
1"Wildflowers crowded the clearing—foxgloves and bluebells and things she had no names for, all of them blooming as though it were the height of June, all of them faintly luminous, as if they'd drunk down a day's worth of sun and were giving it back in the dark."
2"A grove this thick with summer flowers should have been thrumming with life—moths, at the very least, fumbling at the glowing blooms."
3"It came from the far side of the clearing, past the densest stand of foxgloves, low and wordless and sweet—a woman's voice, or close to one, threading a melody that almost resolved into something she knew, a lullaby, maybe, the sort her mother used to hum over the washing-up."
4"The foxgloves swayed, though there was no wind, and for an instant—just an instant—she thought she saw something pale move low among the stems, the curve of a shoulder, the line of a back, there and then not, the way an after-image swims when you've looked too long at a light."
5"A breeze finally came, and it carried a smell—not the green sweetness she'd have expected from a meadow but something underneath it, faint and meaty and turned, the smell of a fridge after a power cut."
6"Not drifted, the way stars should over an hour—shifted, lurched, as if the whole sky had been a painted ceiling and someone had nudged the canvas."
7"She could hear it breathing now—slow, wet, patient, the breath of something that had all the time it could ever need and knew it."
8"It flared with heat, a sudden ember pressed to her breastbone, pulsing—once, twice, hard and fast as a frightened heart."
9"Rory closed her hand around the burning stone, fixed her eyes on the standing stones at the threshold she'd come through—still there, still real, fifteen minutes and a whole world away—and very slowly, without turning around, she got to her feet."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount275
adjectiveStacks0
stackExamples(empty)
adverbCount4
adverbRatio0.014545454545454545
lyAdverbCount2
lyAdverbRatio0.007272727272727273
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences78
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences78
mean14.6
std13.96
cv0.956
sampleLengths
024
15
216
337
428
510
612
74
88
99
104
1111
1213
1348
1410
1520
162
174
1821
195
202
214
222
2310
2424
256
267
2732
284
291
3027
316
3222
334
3415
3522
363
3715
387
394
4049
4110
426
435
443
4527
4613
4751
485
495
69.66% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats4
diversityRatio0.44871794871794873
totalSentences78
uniqueOpeners35
48.31% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount1
totalSentences69
matches
0"Just the soft give of"
ratio0.014
75.07% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount25
totalSentences69
matches
0"She stopped at the threshold."
1"She pressed two fingers to"
2"Her voice went out and"
3"She checked her phone."
4"She locked it, unlocked it."
5"she said softly"
6"She'd been warned about this"
7"She hadn't asked what he"
8"She was beginning to wish"
9"She tucked her knees up"
10"It took her a while"
11"She turned her head."
12"It came from the far"
13"She felt herself lean toward"
14"She kept her eyes on"
15"Her mouth had gone dry."
16"She made herself sit still."
17"It rolled over her and"
18"She looked down quickly."
19"she said, and was annoyed"
ratio0.362
97.68% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount50
totalSentences69
matches
0"The standing stones came up"
1"She stopped at the threshold."
2"The text had said to"
3"The Heartstone lay against her"
4"She pressed two fingers to"
5"Whatever it sensed, it didn't"
6"Her voice went out and"
7"Wildflowers crowded the clearing—foxgloves and"
8"The grass was the deep"
9"She checked her phone."
10"The screen showed no signal,"
11"She locked it, unlocked it."
12"she said softly"
13"She'd been warned about this"
14"Silas had said, once, with"
15"She hadn't asked what he"
16"She was beginning to wish"
17"Rory picked a spot near"
18"That was the instruction."
19"She tucked her knees up"
ratio0.725
72.46% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences69
matches
0"Now she stood between two"
ratio0.014
27.03% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences37
technicalSentenceCount6
matches
0"No signature, just an address that wasn't an address—a string of words that her phone refused to map until she'd already walked half of Richmond Park and stumbl…"
1"Wildflowers crowded the clearing—foxgloves and bluebells and things she had no names for, all of them blooming as though it were the height of June, all of them…"
2"The silence that rushed back in was worse than before, because now it was a silence that had been interrupted, a silence that knew she was listening."
3"Every animal nerve in her body screamed to turn around and she did not, because she understood, with a clarity that arrived from somewhere deeper than thought, …"
4"She could hear it breathing now—slow, wet, patient, the breath of something that had all the time it could ever need and knew it."
5"And the voice that had been singing said, in a tone of mild, almost loving disappointment, so close now that she felt the breath of it stir the hair at the back…"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags5
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags3
fancyCount0
fancyTags(empty)
dialogueSentences7
tagDensity0.429
leniency0.857
rawRatio0
effectiveRatio0
79.1807%