Run: 2026-05-29-01KSSJJGYJ4FW1N1DZZ7MGNBY5

Run Details

Duration:
38.2s
Cost:
$0.056500
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 directions Eva had given her made no sense until they suddenly did. A gap in the bracken, a stile half-swallowed by ivy, and then the path forked where no path should fork. Rory followed the left branch the way she'd been told, counting her steps the way she'd been told, and at sixty paces the cold came down around her like a held breath. Richmond Park did not feel like this. She'd cut through it a hundred times on the bike, the city's hum always present at the edges — a siren two miles off, the drone of the South Circular, the occasional aircraft stitching the dark overhead. Here there was nothing. The kind of nothing that pressed against the eardrums. She stopped at the boundary of oaks, those great gnarled sentinels Eva had described, their trunks set in a rough circle like teeth in an old jaw, and she understood for the first time that her friend had not been speaking in metaphor. The standing stones were trees. Trees were standing stones. Both at once, somehow, depending on how long she let her eyes rest. "Right," Rory said aloud, because the silence wanted breaking. "Lovely. Very normal." The pendant lay cool against her sternum, tucked beneath her jumper. She'd worn it for weeks now without understanding it, the way you keep a stranger's umbrella out of obligation. It had not so much as flickered. She pressed her palm flat against her chest to feel it through the wool, half-hoping for some sign, and found only the ordinary rhythm of her own heart, gone quick. She stepped between the oaks. Inside, it was summer. That was the wrongness, the first of them, and it landed in her stomach like a swallowed stone. The October chill she'd carried in fell away between one stride and the next. The clearing opened wide and gentle before her, knee-deep in wildflowers — foxglove, cornflower, things she had no name for — all of them glowing faintly in a light that came from nowhere she could find. No moon. No stars worth the word. And yet she could see the petals, see the soft motion as the meadow breathed in a wind she couldn't feel on her skin. She'd come for answers. That was the reason, the thing she kept hold of like a rope in dark water. Eva had said the Grove would show her what the pendant was, who had given it, what they wanted from her. *Just stand in the center,* Eva had said, *and wait, and don't speak to anything that speaks first.* At the time it had sounded like one of Eva's superstitions, the salt over the shoulder, the avoiding of cracks. Standing here now, Rory wished very much she had asked more questions. She walked to the center. The flowers parted at her shins with a dry whisper, the sound of paper, of insect wings, of something. She turned a slow circle. The oaks ringed her at the edges of vision, dark against the strange luminous grass, and she counted them without meaning to. Seven. She'd come in through a gap, so eight, then, with the gap. She counted again. Seven. The gap was gone. There was no break in the ring of trees. She felt the realization arrive without panic, almost gently, the way you notice the floor is wet only after you've already slipped. "Okay," she breathed. A sound answered her. Not a voice — she would have welcomed a voice, would have known what to do with words. This was lower, beneath words, a single soft note like a finger drawn around the rim of a glass, swelling out of the treeline to her left. She turned toward it and it stopped. When she turned back, the flowers behind her were swaying, a long ripple bending away from her through the meadow as if something had passed through them, low and quick, and was gone. Rory stood very still. *Don't speak to anything that speaks first.* But nothing had spoken. That was the rule, wasn't it, and rules were a kind of safety, a fence you could stand behind. She held to it. She watched the place where the flowers had moved and waited for them to be still, and they would not be still. The ripple came again from the right this time, faster, closer, and again she caught nothing at the end of it — only the suggestion of motion, the swing of grass settling back, the impression that something had ducked below the level of the blooms the instant her eyes found it. The pendant grew warm. It was so faint at first she thought she'd imagined it, the warmth of her own skin reflected back. Then it pulsed — a slow, deliberate beat, out of time with her heart, a heat that bloomed and faded and bloomed again like something breathing against her chest. She pressed her hand to it and felt it answer her palm, and a cold understanding moved through her that had nothing to do with the vanished October air. *It only does that near a portal.* Eva's words, weeks old. *A door. The bad kind.* There was a door here. She was standing in front of it, or on it, or inside the throat of it, and she could not see it at all. "Eva," she said, and hated how small it came out. The note sounded again, the glass-rim swell, and this time it did not stop when she turned. It circled her. She felt it more than heard it now, a pressure that moved around the clearing's edge, patient, unhurried, the way a thing moves when it is in no danger of losing you. At the corner of her eye a shape stood between two oaks — tall, narrow, wrong in its proportions, a smear of deeper dark against the dark. She would not look at it directly. Some animal wisdom older than thought told her that to look at it fully would be to invite it to be looked at, to make it real in a way it was not yet entirely real. So she kept it at the edge, in the soft blur of her side vision, and it kept itself there too, and they understood each other in that, the watcher and the watched. The flowers had stopped swaying. Everything had gone still and breathless and waiting. The pendant pulsed hard, once, a heat that nearly burned, and in the awful quiet that followed Rory heard it at last — close, very close, just behind her left shoulder, at the level of her ear, soft as a secret and shaped exactly like her mother's voice. "Rory," it said. "You're late." She did not turn around.
created_at"2026-05-29T09:55:44.73Z" 5/29/2026, 9:55:44 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2843
moderation_latency(null)
generation_time38206
tokens_prompt812
tokens_completion1616
native_tokens_prompt1170
native_tokens_completion2026
native_tokens_completion_images(null)
native_tokens_reasoning42
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"
usage0.0565
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_016wHrkro2Pnukm6zuMEkKN3"
is_byokfalse
latency1213
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-1780048544-Zx4IRY3c4Imh1YneCmSA"
session_id(null)
api_type"completions"
id"gen-1780048544-sWRD4ITM9P9ZD50reGVS"
upstream_id"msg_016wHrkro2Pnukm6zuMEkKN3"
total_cost0.0565
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
totalTags4
adverbTagCount1
adverbTags
0"Rory said aloud [aloud]"
dialogueSentences6
tagDensity0.667
leniency1
rawRatio0.25
effectiveRatio0.25
73.33% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1125
totalAiIsmAdverbs6
found
0
adverb"suddenly"
count1
1
adverb"very"
count4
2
adverb"gently"
count1
highlights
0"suddenly"
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)
60.00% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1125
totalAiIsms9
found
0
word"sentinels"
count1
1
word"silence"
count1
2
word"flickered"
count1
3
word"stomach"
count1
4
word"chill"
count1
5
word"whisper"
count1
6
word"warmth"
count1
7
word"pulsed"
count2
highlights
0"sentinels"
1"silence"
2"flickered"
3"stomach"
4"chill"
5"whisper"
6"warmth"
7"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
narrationSentences74
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount2
hedgeCount0
narrationSentences74
filterMatches
0"see"
1"notice"
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences76
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen50
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans5
markdownWords34
totalWords1133
ratio0.03
matches
0"Just stand in the center,"
1"and wait, and don't speak to anything that speaks first."
2"Don't speak to anything that speaks first."
3"It only does that near a portal."
4"A door. The bad kind."
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
totalMentions17
wordCount1124
uniqueNames7
maxNameDensity0.53
worstName"Eva"
maxWindowNameDensity1.5
worstWindowName"Eva"
discoveredNames
Eva6
Park1
South1
Circular1
October2
Grove1
Rory5
persons
0"Eva"
1"October"
2"Grove"
3"Rory"
places
0"Park"
globalScore1
windowScore1
97.92% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences48
glossingSentenceCount1
matches
0"sounded like one of Eva's superstitions, t"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1133
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences76
matches
0"does that near"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs27
mean41.96
std42.83
cv1.021
sampleLengths
065
1100
222
312
467
55
64
799
891
951
101
1115
121
1335
143
1589
164
17107
184
1993
2029
2110
22155
2313
2448
255
265
91.04% Passive voice overuse
Target: ≤2% passive sentences
passiveCount3
totalSentences74
matches
0"been told"
1"been told"
2"was gone"
3"was gone"
94.18% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount3
totalVerbs189
matches
0"were standing"
1"were swaying"
2"was standing"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount8
semicolonCount0
flaggedSentences7
totalSentences76
ratio0.092
matches
0"She'd cut through it a hundred times on the bike, the city's hum always present at the edges — a siren two miles off, the drone of the South Circular, the occasional aircraft stitching the dark overhead."
1"The clearing opened wide and gentle before her, knee-deep in wildflowers — foxglove, cornflower, things she had no name for — all of them glowing faintly in a light that came from nowhere she could find."
2"Not a voice — she would have welcomed a voice, would have known what to do with words."
3"The ripple came again from the right this time, faster, closer, and again she caught nothing at the end of it — only the suggestion of motion, the swing of grass settling back, the impression that something had ducked below the level of the blooms the instant her eyes found it."
4"Then it pulsed — a slow, deliberate beat, out of time with her heart, a heat that bloomed and faded and bloomed again like something breathing against her chest."
5"At the corner of her eye a shape stood between two oaks — tall, narrow, wrong in its proportions, a smear of deeper dark against the dark."
6"The pendant pulsed hard, once, a heat that nearly burned, and in the awful quiet that followed Rory heard it at last — close, very close, just behind her left shoulder, at the level of her ear, soft as a secret and shaped exactly like her mother's voice."
90.72% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1120
adjectiveStacks1
stackExamples
0"lay cool against her"
adverbCount49
adverbRatio0.04375
lyAdverbCount12
lyAdverbRatio0.010714285714285714
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences76
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences76
mean14.91
std12.47
cv0.836
sampleLengths
013
120
232
37
437
54
69
743
85
94
1013
119
123
1311
1419
157
1630
175
184
1918
2014
2136
222
235
2424
254
2616
2721
2838
2912
305
3119
325
3322
341
3512
363
371
384
399
4022
413
424
4318
4427
457
4633
474
4811
4919
60.09% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats6
diversityRatio0.40789473684210525
totalSentences76
uniqueOpeners31
98.04% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount2
totalSentences68
matches
0"*Just stand in the center,*"
1"Then it pulsed — a"
ratio0.029
78.82% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount24
totalSentences68
matches
0"She'd cut through it a"
1"She stopped at the boundary"
2"She'd worn it for weeks"
3"It had not so much"
4"She pressed her palm flat"
5"She stepped between the oaks."
6"She'd come for answers."
7"She walked to the center."
8"She turned a slow circle."
9"She'd come in through a"
10"She counted again."
11"She felt the realization arrive"
12"She turned toward it and"
13"She held to it."
14"She watched the place where"
15"It was so faint at"
16"She pressed her hand to"
17"*It only does that near"
18"She was standing in front"
19"she said, and hated how"
ratio0.353
55.59% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount55
totalSentences68
matches
0"The directions Eva had given"
1"A gap in the bracken,"
2"Rory followed the left branch"
3"Richmond Park did not feel"
4"She'd cut through it a"
5"Here there was nothing."
6"The kind of nothing that"
7"She stopped at the boundary"
8"The standing stones were trees."
9"Trees were standing stones."
10"Both at once, somehow, depending"
11"Rory said aloud, because the"
12"The pendant lay cool against"
13"She'd worn it for weeks"
14"It had not so much"
15"She pressed her palm flat"
16"She stepped between the oaks."
17"That was the wrongness, the"
18"The October chill she'd carried"
19"The clearing opened wide and"
ratio0.809
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences68
matches(empty)
ratio0
87.91% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences39
technicalSentenceCount3
matches
0"The clearing opened wide and gentle before her, knee-deep in wildflowers — foxglove, cornflower, things she had no name for — all of them glowing faintly in a l…"
1"When she turned back, the flowers behind her were swaying, a long ripple bending away from her through the meadow as if something had passed through them, low a…"
2"Then it pulsed — a slow, deliberate beat, out of time with her heart, a heat that bloomed and faded and bloomed again like something breathing against her chest…"
0.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags4
uselessAdditionCount1
matches
0"Rory said aloud, because the silence wanted breaking"
25.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags4
fancyCount1
fancyTags
0"she breathed (breathe)"
dialogueSentences6
tagDensity0.667
leniency1
rawRatio0.25
effectiveRatio0.25
77.0879%