Run: 2026-05-31-01KSYXMNG587651EMDG67JGF5S

Run Details

Duration:
37.5s
Cost:
$0.056400
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 rose out of the dark like teeth, their bark slick with something Aurora hoped was only dew. She'd counted on the moon. There wasn't one tonight, or if there was, the canopy had swallowed it whole, leaving only the thin beam of her phone torch to cut a path through Richmond Park. She shouldn't have come after dark. Eva had told her as much. "Just need to see it for myself," she muttered, and her own voice sounded wrong in the quiet, too flat, as if the air refused to carry it. The pendant lay warm against her sternum. Not hot. Just warm, the way a hand felt when it had been resting on yours too long. She pressed her palm to it through her shirt and felt the faint pulse beneath the crimson stone, steady as a sleeper's heart. Wildflowers crowded the clearing beyond the stones. In daylight they'd been beautiful, all that impossible colour blooming in the dead of October. Now they were grey shapes nodding in a wind she couldn't feel on her skin. She stepped between the stones. The temperature dropped. Not gradually — all at once, like walking into a cellar. Her breath ghosted out in front of her and hung there a half-second too long before fading. "Okay," she whispered. "Okay. In, look, out." The grass gave under her trainers without a sound. That was the first thing she noticed properly, the thing that made the hairs on her arms lift. No crunch. No rustle. She stamped her foot, hard, and heard nothing at all. Aurora swung the torch in a slow arc. Trees, stones, flowers. The far edge of the clearing dissolved into black before the light could reach it. She had the sudden, certain sense that the grove was larger now than it had been this afternoon, that the boundary stones sat further apart, the distance stretched like pulled toffee. Time moves differently here, Eva had said. An hour can be a minute. A minute can be a day. She checked her phone. 11:47. The number sat there, unchanging, and as she watched, the colon between the digits stopped blinking. "Right." She lowered the phone. "Not staying long, then." A sound came from her left. A single note, high and clear, like a wineglass touched with a wet finger. It hung in the air and faded. She turned. Nothing. The flowers nodded. "Hello?" The word left her and went nowhere. No echo. The clearing ate it. Another note answered, this one from behind her, lower, longer. Then a third to her right, and a fourth she couldn't place, and she understood with a cold sliding feeling in her gut that they were circling. Whatever made the sounds was moving around the edge of the light, just past where she could see, and the notes were coming faster now, overlapping, a melody assembling itself out of the dark. She kept the torch moving. Stone. Tree. Flower. A gap where she was sure a tree had been. The pendant pulsed harder. "I shouldn't have come," she told it, as if it could hear, as if it cared. "I know. I know." At the edge of the torchlight, something pale shifted. She fixed the beam on it and there was nothing — only the grass, only the flowers, only the dark crouched behind them like water behind glass. But she'd seen it. A shape, tall and thin and wrong in its proportions, the length of its limbs not adding up. The moment the light touched the space it had occupied, it simply wasn't, and the certainty of that absence was worse than seeing it. Her mouth had gone dry. She wet her lips. "I can see you," she lied. The music stopped. The silence that followed had weight. It pressed against her ears until she could hear her own pulse, a wet thudding, and beneath it, faint, something else. Breathing. Slow and deep and far too large, coming from everywhere and nowhere, the clearing itself drawing breath. Aurora took a step backward. Then another. She kept the torch ahead of her and felt for the stones with her free hand, fingers splayed, reaching for the cold rough comfort of bark that marked the way out. Her hand closed on empty air. She turned. The stones weren't where she'd left them. The torch found only flowers and dark and that impossible stretching distance, and panic rose in her throat like bile. "No," she said. "No, no —" Something laughed. It was soft. Almost kind. It came from just behind her left shoulder, close enough that she should have felt breath against her neck, and she spun with the torch raised like a weapon and there was nothing there, nothing, only the cold and the nodding grey heads of the flowers and the breathing, that vast slow breathing, deeper now, as if whatever owned it had moved nearer. The pendant burned. Not warm anymore — hot, searing through her shirt, and she clutched it and felt it throbbing against her palm in time with that other heartbeat, the great one beneath the clearing, the two of them syncing, calling to each other across the dark. A portal. Eva had warned her about that too. The pendant only ever got hot near one thing. "Where," Aurora breathed. "Show me where." She held it out on its chain and turned in a slow circle. The heat spiked toward the black edge of the clearing, the place the torch couldn't reach. Of course. Of course the way out led toward the thing that breathed. Behind her, the flowers began to sing again. This time there were words in it. She couldn't understand them — they slid off her mind like rain off glass — but they were words, threaded through the high glass notes, and they were getting closer, and the breathing had stopped, which was somehow far worse than its continuing. Something brushed her hair. She didn't turn this time. She fixed her eyes on the dark ahead, the pendant blazing in her fist, and she ran toward the one place every instinct in her body screamed she should never go.
created_at"2026-05-31T11:45:21.426Z" 5/31/2026, 11:45:21 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2885
moderation_latency124
generation_time37333
tokens_prompt1038
tokens_completion1547
native_tokens_prompt1480
native_tokens_completion1960
native_tokens_completion_images(null)
native_tokens_reasoning45
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"
usage0.0564
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01TshU8CBck5A1cLA41fvbaB"
is_byokfalse
latency1560
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-1780227921-F5kaLVAR9raOkRU5JHWN"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1780227921-IWZZ7YYjztL2iaTncSX3"
upstream_id"msg_01TshU8CBck5A1cLA41fvbaB"
total_cost0.0564
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
totalTags7
adverbTagCount0
adverbTags(empty)
dialogueSentences13
tagDensity0.538
leniency1
rawRatio0
effectiveRatio0
100.00% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1030
totalAiIsmAdverbs0
found(empty)
highlights(empty)
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)
66.02% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1030
totalAiIsms7
found
0
word"pulse"
count2
1
word"echo"
count1
2
word"pulsed"
count1
3
word"silence"
count1
4
word"weight"
count1
5
word"searing"
count1
highlights
0"pulse"
1"echo"
2"pulsed"
3"silence"
4"weight"
5"searing"
100.00% Cliché density
Target: ≤1 cliche(s) per 800-word window
totalCliches1
maxInWindow1
found
0
label"hung in the air"
count1
highlights
0"hung in the air"
100.00% Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells0
narrationSentences94
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount1
narrationSentences94
filterMatches(empty)
hedgeMatches
0"began to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences100
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen63
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1035
ratio0
matches(empty)
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions7
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions10
wordCount997
uniqueNames5
maxNameDensity0.4
worstName"Aurora"
maxWindowNameDensity0.5
worstWindowName"Aurora"
discoveredNames
Aurora4
Richmond1
Park1
October1
Eva3
persons
0"Aurora"
1"Eva"
places
0"Richmond"
1"Park"
globalScore1
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences54
glossingSentenceCount0
matches(empty)
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1035
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences100
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs41
mean25.24
std20.85
cv0.826
sampleLengths
055
112
228
348
437
55
631
77
841
957
1019
1121
129
1327
146
151
1613
1771
1818
194
2020
219
2273
239
246
253
2645
2738
286
2929
306
312
3268
3347
3418
356
3642
378
3850
394
4036
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount0
totalSentences94
matches(empty)
78.05% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount3
totalVerbs164
matches
0"were circling"
1"were coming"
2"were getting"
28.57% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount5
semicolonCount0
flaggedSentences4
totalSentences100
ratio0.04
matches
0"Not gradually — all at once, like walking into a cellar."
1"She fixed the beam on it and there was nothing — only the grass, only the flowers, only the dark crouched behind them like water behind glass."
2"Not warm anymore — hot, searing through her shirt, and she clutched it and felt it throbbing against her palm in time with that other heartbeat, the great one beneath the clearing, the two of them syncing, calling to each other across the dark."
3"She couldn't understand them — they slid off her mind like rain off glass — but they were words, threaded through the high glass notes, and they were getting closer, and the breathing had stopped, which was somehow far worse than its continuing."
94.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount720
adjectiveStacks1
stackExamples
0"lay warm against her"
adverbCount28
adverbRatio0.03888888888888889
lyAdverbCount10
lyAdverbRatio0.013888888888888888
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences100
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences100
mean10.35
std10.92
cv1.055
sampleLengths
020
15
230
36
46
528
67
72
816
923
107
1115
1215
135
143
1511
1617
173
184
199
2018
212
222
2310
248
253
2615
2731
287
296
306
314
321
3316
345
354
366
3714
387
392
401
413
421
437
442
454
4610
4727
4834
495
58.25% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats9
diversityRatio0.40404040404040403
totalSentences99
uniqueOpeners40
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount3
totalSentences73
matches
0"Just warm, the way a"
1"Then a third to her"
2"Of course the way out"
ratio0.041
83.01% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount25
totalSentences73
matches
0"She'd counted on the moon."
1"She shouldn't have come after"
2"she muttered, and her own"
3"She pressed her palm to"
4"She stepped between the stones."
5"Her breath ghosted out in"
6"She stamped her foot, hard,"
7"She had the sudden, certain"
8"She checked her phone."
9"She lowered the phone"
10"It hung in the air"
11"She kept the torch moving."
12"she told it, as if"
13"She fixed the beam on"
14"Her mouth had gone dry."
15"She wet her lips."
16"It pressed against her ears"
17"She kept the torch ahead"
18"Her hand closed on empty"
19"It was soft."
ratio0.342
49.04% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount60
totalSentences73
matches
0"The standing stones rose out"
1"She'd counted on the moon."
2"She shouldn't have come after"
3"Eva had told her as"
4"she muttered, and her own"
5"The pendant lay warm against"
6"She pressed her palm to"
7"Wildflowers crowded the clearing beyond"
8"She stepped between the stones."
9"The temperature dropped."
10"Her breath ghosted out in"
11"The grass gave under her"
12"That was the first thing"
13"She stamped her foot, hard,"
14"Aurora swung the torch in"
15"Trees, stones, flowers."
16"The far edge of the"
17"She had the sudden, certain"
18"An hour can be a"
19"A minute can be a"
ratio0.822
68.49% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences73
matches
0"Now they were grey shapes"
ratio0.014
98.21% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences32
technicalSentenceCount2
matches
0"She kept the torch ahead of her and felt for the stones with her free hand, fingers splayed, reaching for the cold rough comfort of bark that marked the way out…"
1"It came from just behind her left shoulder, close enough that she should have felt breath against her neck, and she spun with the torch raised like a weapon and…"
53.57% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags7
uselessAdditionCount1
matches
0"she told, as if it could hear, as if it cared"
0.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags6
fancyCount4
fancyTags
0"she muttered (mutter)"
1"she whispered (whisper)"
2"she lied (lie)"
3"Aurora breathed (breathe)"
dialogueSentences13
tagDensity0.462
leniency0.923
rawRatio0.667
effectiveRatio0.615
85.9074%