Run: 2026-05-29-01KSSJMS24ZSCFZXW5FQ48XQA8

Run Details

Duration:
45.2s
Cost:
$0.071500
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> <character id="4418" name="Nyx" aliases="Nyx, the Shadow, Nightwhisper" pronouns="they/them" species="Shade" storyRole="Wild Card"> <eyeColor>faintly glowing violet</eyeColor> <height>approximately 6'2" in solid form</height> <age>ageless</age> <form>humanoid silhouette of living shadow, can shift between solid and incorporeal</form> <voice>sounds like a whisper carried on the wind</voice> <description>A being of living shadow, existing between the mortal plane and the spaces between realms.</description> <backstory>Nyx was once a human sorcerer named Aldric who became trapped between realms during a failed summoning ritual in 1643. They now exist as a Shade, bound to the mortal plane but able to slip between shadows.</backstory> </character> <character id="4424" name="Isolde Varga" aliases="Isolde, the Seer" pronouns="she/her" species="Half-Fae" storyRole="Oracle"> <eyeColor>pale lavender</eyeColor> <hair>silver, reaching her waist</hair> <height>5'5"</height> <age>300 years old</age> <appearance>ethereal, ageless</appearance> <speech>speaks in riddles</speech> <footprints>leaves no footprints when she walks</footprints> <compulsion>cannot lie (Fae compulsion) but can mislead</compulsion> <description>A Half-Fae seer exiled from the Fae Courts for sharing visions with mortals.</description> <backstory>She now lives in a hidden grove in Richmond Park, offering cryptic prophecies to those who seek her out.</backstory> </character> <location id="853" name="Dymas (Gluttony)" aliases="Dymas, gluttony, Dymasian" realm="Hel" sin="Gluttony"> <ruler>Prince Belphegor</ruler> <skyColor>warm amber</skyColor> <description>A place of excess and indulgence. Sprawling vineyards, orchards, and gardens provide exotic ingredients for master chefs — often helbound souls contracted from Earth. Grand feasts and culinary competitions are common.</description> </location> <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> <item id="2006" name="Fae-Forged Blade" aliases="the Fae blade, Isolde's gift" type="Weapon" origin="The Fae Courts"> <material>moonsilver</material> <shape>slender, leaf-shaped dagger</shape> <temperature>always cold to the touch</temperature> <glow>faintly luminescent in moonlight</glow> <power>can cut through magical wards; particularly effective against demons</power> <givenTo>given to Aurora by Isolde as a gift</givenTo> <description>A weapon of the Fae Courts, rare and highly coveted.</description> </item> <lore id="7001" name="The Veil" aliases="the Veil, the Barrier, the Boundary" category="Cosmology"> <solsticeEffect>weakens during the winter solstice, strengthens during the summer solstice</solsticeEffect> <appearance>faint shimmering distortion visible only to those with supernatural sight</appearance> <monitoring>rift points (tears in the Veil) are monitored by the Wardens</monitoring> <description>The Veil is the metaphysical barrier separating Earth from Hel and the Fae Realms.</description> </lore> </codex> Write a fully fleshed out scene of at least 1000 words in the fantasy genre. A small group enters an ancient, otherworldly place for the first time. The environment is alien and wondrous. Describe their exploration — what they see, hear, and feel as they move deeper. Include moments of discovery, unease, and wonder. Let the world-building emerge through the characters' experience rather than exposition. Use the codex entries above as your world reference for characters, setting, and lore. Only include the prose of the scene without any markdown or commentary.

Model response

AI
The standing stones came up out of the bracken like the ribs of something long dead, two slabs of weathered oak grown so old they'd gone grey as stone. Aurora stopped between them with one hand pressed to the bark, and felt the hair lift along her forearms. "This is it," she said. "It has to be." Behind her, Eva crashed through the last of the undergrowth, breathing hard, a leaf caught in her dark curls. "It's a tree. Two trees. Rory, we have walked Richmond Park for three hours and you've brought me to two trees." "They're not trees." That was Nyx, and the voice came from everywhere and nowhere, a whisper threaded through the cold air. The Shade drifted at the edge of the path where the afternoon light couldn't quite hold them, a smear of darkness that was almost a person. Faint violet eyes opened in the gloom. "Look at the ground." Aurora looked. The path ran up to the stones and stopped. On this side, ordinary mud, ordinary roots, a crisp packet someone had dropped a year ago. On the far side, between and beyond the oaks, the grass was a green so deep it looked wet, and wildflowers stood up out of it in colors she had no clean words for. Foxgloves in the wrong season. Bluebells. Something with petals like spun glass that turned, slowly, to follow no sun she could see. "It's October," Eva said quietly. All the laughter had gone out of her. "Those are spring flowers." "Year-round, apparently." Aurora's heart was going hard against her ribs. At her sternum, beneath her jacket, the Heartstone Pendant lay quiet and cool. Whatever waited past the stones, it wasn't Hel. That, at least, was something. "Isolde said the boundary would feel like a held breath. Stay close. Don't eat anything. Don't drink anything. Don't promise anything." "That's a lot of don'ts." "Fae rules." Aurora stepped through. The change came over her like stepping out of a cold sea into warm shallows. The damp October chill simply ceased. The air on the far side of the oaks was soft and golden and smelled of crushed honey and green growing things, and underneath it, faint and strange, the mineral tang of cut stone. Sound changed too. The traffic-hum of London that you stopped hearing because it never stopped — gone. In its place: water somewhere, and a low hum like distant bees, and a high silvery ringing that might have been birdsong or might have been the flowers themselves. She turned back. Eva stood framed between the stones with one foot still in the ordinary world, gawping. Beyond her, through the gap, Aurora could see the brown park, the grey sky, a jogger trotting past oblivious not thirty feet away. "They can't see us," Aurora realized. "We're standing right here and that man can't see us." "Come through," she told Eva. "Slowly." Eva came. The instant her trailing foot crossed the threshold, the gap behind her seemed to shimmer and fold, the park's grey light dimming as though a curtain had been drawn, and then there was only the grove — a wide green clearing ringed with impossible flowers, and the canopy above them stitched together so thick that the light fell through it in shifting coins of gold. Nyx came last, and Aurora watched the Shade with interest. Out in the park they'd been faint, a thing of corners and overcast. Here they thickened. The shadow pulled itself upright, broad-shouldered, six feet and more, the violet eyes burning steadier and brighter than she'd ever seen them. "You're more solid," she said. "This place is closer to the spaces I move through." The whisper carried an edge of something Aurora couldn't name — hunger, or homesickness. "The Veil is thin here. Worn through, almost. I can feel the seams of it." A hand of living dark lifted, fingers spreading, and for a moment the air between them rippled like the surface of a pond. "There. Did you feel that? A door that isn't a door." Eva had crouched down at the edge of the flowers, hands clasped firmly behind her back like a child told not to touch the museum exhibits. "Rory. Rory, look." The glass-petaled flower had turned to face her. As Aurora knelt beside her friend, every bloom in the grove turned with the slow, deliberate grace of a watching crowd, hundreds of pale faces swiveling toward the three intruders. "They know we're here," Eva breathed. "Everything here knows we're here." Aurora stood, brushing grass from her knees. The blade Isolde had given her rode against her hip in its sheath, and even through the leather she could feel the cold of the moonsilver, faint and constant as a held note. It had warmed for nothing on the way here. It did not warm now. She found that more comforting than she had any right to. They moved deeper. The clearing was larger than it had looked from the stones, or else it grew as they walked it, which Aurora suspected might be nearer the truth. The bee-hum rose and fell. They passed a stream that ran uphill over white pebbles, the water singing to itself, and Eva stared at it so long that Aurora had to take her elbow and steer her on. They passed a ring of paler grass where nothing bloomed, and Nyx drifted wide around it without being asked, and when Aurora looked closely she saw the grass inside the ring was bent and beaten flat as though by long, patient dancing. "Don't step in the ring," she said. "Wasn't going to." It was the footprints that finally raised the gooseflesh on the back of Aurora's neck — or rather the lack of them. The earth at the heart of the grove was soft, dark loam, and it had taken Aurora's prints and Eva's clear as stamps. But threaded through them, crossing and recrossing, was a trail of crushed wildflowers, of bent stems and disturbed petals, marking where something had walked again and again across the clearing — and nowhere, not once, the press of a foot. "Someone walks here," Eva said. "A lot. And leaves no mark." "She leaves no footprints." The voice came from behind them, low and amused, and it was none of theirs. Aurora turned. The Seer stood at the edge of the dancing-ring where a moment before there had been no one, silver hair pooling past her waist, pale lavender eyes catching the golden light like two slivers of moon. She had not heard her come. There had been nothing to hear. "You found the door," Isolde said. "How clever of you. Now we shall see whether you were clever enough to bring the right questions, or only the dangerous ones." She smiled, and it did not quite reach her eyes. "Welcome to the Grove, Aurora Carter. Try not to make any promises."
created_at"2026-05-29T09:56:58.576Z" 5/29/2026, 9:56:58 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4192
moderation_latency(null)
generation_time45146
tokens_prompt1590
tokens_completion1747
native_tokens_prompt2385
native_tokens_completion2383
native_tokens_completion_images(null)
native_tokens_reasoning69
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"
usage0.0715
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_019zU6xPvaoifZK1JpjoLXoL"
is_byokfalse
latency1587
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-1780048618-SBhNBZy0hDOIsm1Bx8Wy"
session_id(null)
api_type"completions"
id"gen-1780048618-YwAkL7eTTRhXubMEPU9g"
upstream_id"msg_019zU6xPvaoifZK1JpjoLXoL"
total_cost0.0715
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
totalTags16
adverbTagCount1
adverbTags
0"Eva said quietly [quietly]"
dialogueSentences30
tagDensity0.533
leniency1
rawRatio0.063
effectiveRatio0.063
91.33% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1153
totalAiIsmAdverbs2
found
0
adverb"slowly"
count2
highlights
0"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)
60.97% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1153
totalAiIsms9
found
0
word"whisper"
count2
1
word"gloom"
count1
2
word"chill"
count1
3
word"firmly"
count1
4
word"could feel"
count1
5
word"comforting"
count1
6
word"dancing"
count2
highlights
0"whisper"
1"gloom"
2"chill"
3"firmly"
4"could feel"
5"comforting"
6"dancing"
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
narrationSentences67
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount1
narrationSentences67
filterMatches(empty)
hedgeMatches
0"seemed to"
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences80
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
totalWords1158
ratio0
matches(empty)
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions9
unquotedAttributions0
matches(empty)
66.58% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions39
wordCount959
uniqueNames11
maxNameDensity1.67
worstName"Aurora"
maxWindowNameDensity3
worstWindowName"Aurora"
discoveredNames
Eva10
Nyx3
Shade2
Heartstone1
Pendant1
Hel1
October1
London1
Aurora16
Isolde2
Seer1
persons
0"Eva"
1"Nyx"
2"Shade"
3"October"
4"Aurora"
5"Isolde"
6"Seer"
places
0"London"
globalScore0.666
windowScore0.667
38.89% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences45
glossingSentenceCount2
matches
0"quite hold them, a smear of darkness that was almost a person"
1"not quite reach her eyes"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1158
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences80
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs30
mean38.6
std31.09
cv0.805
sampleLengths
048
19
240
358
483
517
657
75
85
9101
1041
1116
126
1367
1448
155
1673
1729
1838
196
2070
213
22107
237
243
2585
2611
2719
2850
2951
94.79% Passive voice overuse
Target: ≤2% passive sentences
passiveCount2
totalSentences67
matches
0"been drawn"
1"being asked"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount1
totalVerbs151
matches
0"was going"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount5
semicolonCount0
flaggedSentences5
totalSentences80
ratio0.063
matches
0"The traffic-hum of London that you stopped hearing because it never stopped — gone."
1"The instant her trailing foot crossed the threshold, the gap behind her seemed to shimmer and fold, the park's grey light dimming as though a curtain had been drawn, and then there was only the grove — a wide green clearing ringed with impossible flowers, and the canopy above them stitched together so thick that the light fell through it in shifting coins of gold."
2"\"This place is closer to the spaces I move through.\" The whisper carried an edge of something Aurora couldn't name — hunger, or homesickness."
3"It was the footprints that finally raised the gooseflesh on the back of Aurora's neck — or rather the lack of them."
4"But threaded through them, crossing and recrossing, was a trail of crushed wildflowers, of bent stems and disturbed petals, marking where something had walked again and again across the clearing — and nowhere, not once, the press of a foot."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount959
adjectiveStacks0
stackExamples(empty)
adverbCount36
adverbRatio0.03753910323253389
lyAdverbCount7
lyAdverbRatio0.0072992700729927005
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences80
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences80
mean14.48
std12.37
cv0.854
sampleLengths
029
119
25
34
419
521
621
726
87
94
102
119
1216
1334
145
151
1616
175
188
194
2010
2113
228
235
2421
255
265
2715
286
2934
303
3114
3229
333
3415
3523
366
3710
385
391
402
4165
4210
4313
443
4522
465
4724
4838
4911
82.08% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats6
diversityRatio0.5375
totalSentences80
uniqueOpeners43
0.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount0
totalSentences56
matches(empty)
ratio0
100.00% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount11
totalSentences56
matches
0"She turned back."
1"she told Eva"
2"It had warmed for nothing"
3"It did not warm now."
4"She found that more comforting"
5"They moved deeper."
6"They passed a stream that"
7"They passed a ring of"
8"It was the footprints that"
9"She had not heard her"
10"She smiled, and it did"
ratio0.196
49.29% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount46
totalSentences56
matches
0"The standing stones came up"
1"Aurora stopped between them with"
2"That was Nyx, and the"
3"The Shade drifted at the"
4"The path ran up to"
5"Foxgloves in the wrong season."
6"Something with petals like spun"
7"Eva said quietly"
8"All the laughter had gone"
9"Aurora's heart was going hard"
10"Whatever waited past the stones,"
11"That, at least, was something."
12"Aurora stepped through"
13"The change came over her"
14"The damp October chill simply"
15"The air on the far"
16"Sound changed too."
17"The traffic-hum of London that"
18"She turned back."
19"Eva stood framed between the"
ratio0.821
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences56
matches(empty)
ratio0
93.60% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences29
technicalSentenceCount2
matches
0"The instant her trailing foot crossed the threshold, the gap behind her seemed to shimmer and fold, the park's grey light dimming as though a curtain had been d…"
1"They passed a ring of paler grass where nothing bloomed, and Nyx drifted wide around it without being asked, and when Aurora looked closely she saw the grass in…"
93.75% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags16
uselessAdditionCount1
matches
0"the voice came, a whisper threaded through the cold air"
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags8
fancyCount1
fancyTags
0"Eva breathed (breathe)"
dialogueSentences30
tagDensity0.267
leniency0.533
rawRatio0.125
effectiveRatio0.067
82.3757%