NC Bench
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Run: 2026-02-17-01KHMF1HTXKJB6G055GGD9T2SC
Run Details
Model:
Stealth: Aurora Alpha
Test:
Bad Writing Habits
Scenario:
Horror: alone in an eerie place at night
Duration:
8.0s
Cost:
$0.000000
Provider:
Stealth
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
Messages
Meta
AI
Aurora Carter slipped the silver chain of the Heartstone Pendant around her neck, the tiny crimson gem resting against the hollow of her throat. It was colder than the night air, but a faint warmth seeped from it, a pulse that thrummed in time with her own heartbeat. She had taken the shortcut through Richmond Park after her shift at the Golden Empress, the city’s neon glow fading behind her as the trees grew denser and the path narrowed. The park
was supposed
to be a place of quiet, a place to clear her mind before she headed back to the flat above Silas’ bar. Instead, the darkness
seemed to
press against her, thick and unyielding. She paused at the edge of a narrow lane, the gravel crunching under her boots. A low, almost imperceptible hum rose from the ground, the sound of something far deeper than the wind rustling through the leaves. Aurora glanced at her
watch
—half past three in the morning. The city was a muffled hum of distant traffic, but here the silence was absolute, broken only by the occasional hoot of an owl that
seemed to
echo
from nowhere. The Heartstone’s glow intensified, a soft crimson flare that illuminated the space just enough for her to see the ancient oak standing stones that rose like silent
sentinels
from the earth. Their bark
was gnarled
, twisted into shapes that resembled faces if one stared long enough. The stones formed a rough circle, each one taller than a man, their tops disappearing into the night sky. Wildflowers, impossibly vibrant, carpeted the ground inside the circle, their petals glowing faintly under the moonlight, as if they
were lit
from within. Aurora stepped forward, her boots sinking into the soft moss that lay at the base of the stones. The air grew colder, a chill that
seemed to
seep into her bones. She pulled the pendant tighter, feeling the pulse quicken. The faint inner glow of the gem pulsed in rhythm with an unseen force, a rhythm that felt both ancient and urgent. She remembered the note that had arrived in her mailbox earlier that week, a single sheet of paper with a looping script she didn’t recognize. “Find the heart where the world thins,” it had read. No signature, no return address. The only clue was the Heartstone, which had appeared on her doorstep the same night, wrapped in brown paper and tied with a thin black cord. She had dismissed it as a prank until the pendant
began to
warm whenever she passed near the old oak at the park’s edge. Now, standing in the grove, she felt the
weight
of the decision she had made: to follow the pulse, to see what lay beyond the ordinary. A rustle in the underbrush caught her attention. She turned, eyes scanning the darkness beyond the stones. The wildflowers swayed, their stems bending as if a wind had passed through them, yet the air was still. A shadow
flickered
at the periphery of her vision, a shape that dissolved as soon as she
tried to
focus. She swallowed, the lump in her throat tightening. “Hello?” she called, voice low, barely louder than a whisper. The only response was the soft murmur of the wind through the leaves, a sound that
seemed to
carry a faint, metallic
echo
, like distant bells. She took a step deeper into the circle. The stones
seemed to
close in, their silhouettes growing taller, their bark appearing to pulse with a faint, amber light. The Heartstone’s glow flared, casting a thin halo around her neck. The warmth from the pendant seeped into her skin, a comforting heat that contrasted with the cold that wrapped around her like a shroud. A sudden crack of a twig snapped the silence. Aurora’s eyes darted to the left, where a low branch had broken under unseen
weight
. She could have been alone, but the sound felt deliberate, as if something had placed the branch there to draw her gaze. She held her breath, listening. The night was alive with subtle noises: the distant croak of a frog, the rustle of small creatures in the underbrush, and an almost inaudible, rhythmic thudding that
seemed to
emanate from the stones themselves. She reached out, fingers brushing the rough bark of the nearest stone. The surface was warm, a surprising heat that rose through the wood and into her palm. The pulse of the Heartstone synced with the stone’s thudding, a low reverberation that
resonated
in her chest. She felt a pressure building in her ears, a
feeling that the
world
was narrowing
, focusing on a single point of contact. A whisper, barely audible, drifted on the wind. “You are not alone,” it said, the words forming and dissolving like mist. Aurora’s heart hammered against her ribs. She
tried to
locate the source, but the voice
seemed to
come from everywhere and nowhere all once. She lowered the
weight
of the voice, the quiet hum of the forest, the faint glow of the pendant, and the stone’s pulse. The heartbeat of the grove was a slow, patient rhythm, a rhythm that had existed long before she was born. She felt a tug at the edge of her consciousness, a sensation of being
watch
ed. She turned, eyes narrowing, and saw a figure standing just beyond the circle’s boundary, barely a silhouette against the darkness. It was tall, draped in a cloak of woven shadows that
seemed to
absorb the moonlight. The figure’s head
was bowed
, hands clasped in front, and its presence exuded an ancient, patient malice. Aurora’s breath caught. She lifted the pendant, hoping its glow would illuminate the figure. The gem flared brighter, casting a crimson wash over the grove. The figure’s outline sharpened: gaunt, with elongated limbs, eyes that glowed faintly with a sickly amber light. The creature’s mouth opened, and a low, guttural sound escaped, a sound that was neither a growl nor a sigh, but something in between. She stepped back, the moss giving way beneath her boots. The stones
seemed to
shift, their positions changing imperceptibly, as if the grove itself were a living maze. The wildflowers swayed violently now, their petals trembling as if in fear. The air grew heavy, and the pulse of the Heartstone accelerated, beating like a drum in her throat. “Who are you?” Aurora whispered, her voice trembling yet steady. She
tried to
keep her cool, the way she always did when faced with a problem, but the fear was a cold knot in her stomach that refused to loosen. The figure did not answer. Instead, it lifted a hand, and the darkness that clung to its cloak peeled away like a veil. Behind it lay a doorway of twisted vines and bark, a portal that
seemed to
ripple with a faint, violet light. The portal pulsed in sync with the Heartstone, a heartbeat that promised both danger and revelation. Aurora’s mind raced. The note had spoken of a heart where the world thins. The Heartstone had guided her here, to a place where the veil between Earth and the Fae realm was thin. The portal was that thinnest point. She felt the pull of curiosity, the same force that had driven her to leave Cardiff, to escape an abusive past, to chase the unknown. Yet the fear that coiled in her gut warned her of the cost. She tightened her grip on the pendant, feeling its warmth spread through her fingers. The pulse of the Heartstone matched the thudding of the portal, a syncopated rhythm that
seemed to
call her name. She could feel the
weight
of the ancient oak stones, the centuries of stories they held, the whispers of the fae that lingered in the air like perfume. A sudden gust of wind surged through the grove, scattering wildflower petals like snow. The sound of distant bells rang out, a chime that
resonated
with the Heartstone’s glow. Aurora’s
eyes widened
as she saw the shadows at the edge of the clearing shift and coalesce into shapes—silhouettes of people she had known, faces from her past, each one flickering like a candle in a draft. Her mother’s gentle smile, her father’s firm jaw, Eva’s laughing eyes, even the gaunt face of Evan, the man who had once held her in terror. They drifted past her, silent and mournful, their presence a reminder of the life she had left behind. She pressed her forehead against the stone, feeling the pulse of the earth through the bark. The Heartstone’s glow intensified, a crimson flare that illuminated the portal fully. The violet light within the doorway swirled, showing glimpses of a landscape that defied description: towering trees with leaves of glass, rivers that flowed with liquid starlight, and a sky that shifted between twilight and dawn in an instant. The portal
seemed to
be a window into a world that was both beautiful and terrifying. Aurora’s breath came in shallow bursts. She could feel the
weight
of the scar on her left wrist, a reminder of a childhood accident that had left a crescent-shaped mark, a small but permanent reminder that she had survived pain before. She had survived an abusive relationship, had escaped a life that had threatened to crush her. Now, she stood on the brink of something far greater, something that could swallow her whole. The figure in the cloak stepped forward, its movements fluid, as if it
were made
of water. It placed a hand on the edge of the portal, and the violet light rippled, sending a wave of cold across Aurora’s skin. The whisper she had heard earlier returned, louder this time, “You are not alone, but you are not meant to stay.” Aurora’s mind snapped back to the present. She thought of the delivery routes she had memorized, the way the streets of London
seemed to
pulse with life, the way the city’s neon signs
flickered
like fireflies. She thought of the flat above Silas’ bar, the cheap coffee she brewed at dawn, the way her friends would laugh over a bottle of cheap wine. Those thoughts anchored her, a tether to the world she knew. She lifted the Heartstone, holding it up to the portal. The gem’s glow met the violet light, and for a heartbeat, the two colors merged, creating a swirling vortex of crimson and violet that
seemed to
swallow the darkness around them. The portal’s edges
quivered
, and a sound—soft, melodic, like a choir of distant voices—rose from within. Aurora felt a surge of resolve. She had always been the one to think outside the box, to find a way when the path seemed blocked. She had taken the night shift, taken the risk of living above a bar, taken the risk of leaving behind a life that had hurt her. Now, she would take the risk of stepping into the unknown. She stepped toward the portal, the wildflowers parting before her like a tide. The stones
seemed to
lean in, their ancient bark creaking as if sighing. The air grew thick with the scent of earth after rain, a scent that made her throat tighten. The Heartstone’s pulse quickened, syncing with her own heartbeat, a drumbeat that
echo
ed in the hollows of the grove. “Who are you?” she asked again, her voice steadier now, as if she
were confronting
a puzzle rather than a monster. The figure’s eyes—those amber glints—
flickered
with an expression that was neither hostile nor kind. It was a look of ancient weariness, of a being that had
watch
ed countless humans stumble into its realm, drawn by curiosity, by desperation, by the promise of something beyond their ordinary lives. The figure lifted its hand, revealing a small, intricately carved wooden box, its surface
etched
with runes that
seemed to
shift as she looked. “The heart you seek is not a place,” the figure whispered, “but a choice. The stone you wear is a key, but also a
weight
. It will bind you to the world you step into, and the world you leave behind will remember you.” Aurora’s eyes
flicked
to the pendant, its crimson glow now pulsing like a living thing. She thought of the note, of the unknown benefactor, of the
feeling that something
had been waiting for her. She thought of the scar on her wrist, a reminder that she could bear pain, that she could heal. She thought of the night sky, of the stars that
seemed to
watch
her from above. She lowered the pendant, feeling its warmth settle against her throat. She placed her hand on the wooden box, the carvings sending a shiver up her arm. The portal’s violet light swirled, inviting her in, promising a world where time bent, where the ordinary became extraordinary. She took a breath, inhaling the scent of wildflowers and damp earth, feeling the pulse of the Heartstone against her skin. She stepped forward, crossing the threshold of the portal. As she did, the world around her
seemed to
stretch, the ancient oak standing stones blurring into elongated silhouettes, the wildflowers dissolving into a cascade of light. The last thing Aurora felt before the darkness swallowed her was a whisper that
seemed to
come from within her own mind, a promise and a warning rolled into one: “All who seek the heart must give something in return.” The night in the grove fell silent. The Heartstone’s glow dimmed, the stones returned to their still, ancient posture, and the wildflowers swayed
gently
in the wind, as if nothing had ever
been disturbed
. The portal’s violet light
flickered
once, then vanished, leaving only the faint
echo
of a heartbeat that lingered in the air, a reminder that the world had thinned, and something had taken its place.
created_at
"2026-02-17T00:12:24.532839+00:00"
2/17/2026, 12:12:24 AM
model
"openrouter/aurora-alpha"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1149
moderation_latency
(null)
generation_time
7673
tokens_prompt
812
tokens_completion
3369
native_tokens_prompt
721
native_tokens_completion
2753
native_tokens_completion_images
(null)
native_tokens_reasoning
0
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"stop"
usage
0
router
(null)
provider_responses
(null)
api_type
"completions"
id
"gen-1771287135-GugCRIKrzatrz8p2rhj1"
upstream_id
"gen-1771287135-GugCRIKrzatrz8p2rhj1"
total_cost
0
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Stealth"
Evaluation details
Result
Evaluator
Details
Meta Data
85.7143%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
7
adverbTagCount
1
adverbTags
0
"it said, the words forming and dissolving like mist [like]"
95.6578%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
2303
totalAiIsmAdverbs
1
found
0
adverb
"gently"
count
1
highlights
0
"gently"
100.0000%
AI-ism character names
Target: 0 AI-default names (17 tracked, −20% each)
codexExemptions
(empty)
found
(empty)
100.0000%
AI-ism location names
Target: 0 AI-default location names (33 tracked, −20% each)
codexExemptions
(empty)
found
(empty)
13.1568%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
2303
totalAiIsms
20
found
0
word
"sentinels"
count
1
1
word
"resonated"
count
2
2
word
"flickered"
count
4
3
word
"flicked"
count
1
4
word
"quivered"
count
1
5
word
"weight"
count
6
6
word
"echo"
count
3
7
word
"echoed"
count
1
8
word
"etched"
count
1
highlights
0
"sentinels"
1
"resonated"
2
"flickered"
3
"flicked"
4
"quivered"
5
"weight"
6
"echo"
7
"echoed"
8
"etched"
100.0000%
Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches
1
maxInWindow
1
found
0
label
"eyes widened/narrowed"
count
1
highlights
0
"eyes widened"
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
0
narrationSentences
127
matches
(empty)
70.0103%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
1
hedgeCount
23
narrationSentences
127
filterMatches
0
"watch"
hedgeMatches
0
"seemed to"
1
"began to"
2
"tried to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
2
totalSentences
127
matches
0
"feeling that the"
1
"feeling that something"
44.3617%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
34
mean
67.53
std
20.61
cv
0.305
sampleLengths
0
116
1
77
2
88
3
62
4
116
5
64
6
36
7
63
8
86
9
68
10
88
11
68
12
66
13
58
14
40
15
60
16
78
17
62
18
110
19
83
20
73
21
61
22
74
23
57
24
63
25
63
26
21
27
71
28
44
29
69
30
46
31
57
32
40
33
68
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
6
totalSentences
127
matches
0
"was supposed"
1
"was gnarled"
2
"were lit"
3
"was bowed"
4
"were made"
5
"been disturbed"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
2
totalVerbs
355
matches
0
"was narrowing"
1
"were confronting"
100.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
2223
adjectiveStacks
0
stackExamples
(empty)
adverbCount
53
adverbRatio
0.02384165542060279
lyAdverbCount
16
lyAdverbRatio
0.007197480881691408
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
127
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
127
mean
18.08
std
8.34
cv
0.461
sampleLengths
0
24
1
24
2
31
3
26
4
11
5
15
6
22
7
10
8
30
9
31
10
15
11
19
12
23
13
18
14
13
15
9
16
22
17
25
18
10
19
5
20
26
21
24
22
26
23
8
24
9
25
19
26
20
27
8
28
10
29
26
30
8
31
20
32
11
33
24
34
9
35
15
36
22
37
5
38
35
39
12
40
16
41
18
42
22
43
8
44
13
45
6
46
18
47
23
48
20
49
15
26.3780%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
30
diversityRatio
0.15748031496062992
totalSentences
127
uniqueOpeners
20
0.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
7
fancyCount
5
fancyTags
0
"it had read (read)"
1
"it said, the words forming and dissolving like mist (say, form dissolve like)"
2
"whispered (whisper)"
3
"The whisper she had heard earlier returned, louder this time, (hear return)"
4
"the figure whispered (whisper)"
78.5458%