NC Bench
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Run: 2026-02-17-01KHMT5D7FBNJB37709S0W8YR1
Run Details
Model:
Claude Sonnet 4
Test:
Bad Writing Habits
Scenario:
Horror: alone in an eerie place at night
Duration:
35.4s
Cost:
$0.023244
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
The standing stones
loomed
against the starless sky like ancient
sentinel
s, their gnarled bark catching what little moonlight filtered through the canopy above. Rory stood at the boundary of the Grove, her breath forming small clouds in the unseasonably cold air. The Heartstone pendant lay heavy against her chest, its crimson surface pulsing with that familiar warmth—though tonight, the rhythm felt erratic, almost frantic. She shouldn't be here. Not alone, not at this hour when the veil between worlds grew thin. But the dreams had been getting worse, and the pendant's insistent tugging had finally worn down her resistance. Something in the Grove
was calling
to her, something that made her childhood scar ache with phantom pain. The first step across the threshold
sent a shiver through
her bones that had nothing to do with the cold. The wildflowers that b
loomed
impossibly year-round seemed muted in the darkness, their colors leached to pale shadows. Even the air felt different here—thicker, pregnant with possibilities that made her skin crawl. Rory pulled her jacket tighter and ventured deeper into the clearing. The silence was absolute, pressing against her eardrums with an
weight
that made her want to speak just to break it. But something warned her against making noise, some primitive instinct that whispered of predators in the dark. The pendant's pulse quickened. She paused near the center of the Grove, where the grass grew in perfect circles like fairy rings. The stones around her seemed taller now, or perhaps she had grown smaller. Time moved differently here—Eva had warned her about that. An hour inside could stretch into days outside, or compress into mere minutes. There was no way to tell which way it would flow tonight. A sound drifted through the stillness—soft, like fabric brushing against bark. Rory turned toward it, her bright blue eyes straining against the darkness. Nothing. Just the ancient oaks standing
sentinel
, their branches reaching toward a sky that seemed somehow too close, as if the heavens themselves
were pressing
down on this pocket between worlds. The sound came again, closer now. Definitely fabric, or perhaps leather. The slow, deliberate whisper of something moving with purpose through the underbrush. Rory's hand went instinctively to the pendant, its warmth now uncomfortably hot against her palm. "Hello?" The word escaped before she could stop it, hanging in the air like a confession. The silence that followed felt different—expectant, hungry. As if something had been waiting for her to announce herself. Movement
flickered
at the edge of her vision. She spun toward it, but found only shadows
dancing
between the tree trunks. Her heart hammered against her ribs with a rhythm that
seemed to
echo
the pendant's frantic pulsing. The Grove around her felt
suddenly
smaller, the standing stones drawing closer like a noose tightening. Another sound reached her—breathing that wasn't her own. Slow, measured inhalations that
seemed to
come from everywhere and nowhere at once. The air itself
seemed to
be drawing breath, the Grove's lungs expanding and contracting with alien purpose. Rory backed toward what she hoped was still the entrance, but the stones all looked the same now in the darkness. Ancient oak transformed into ancient oak, each one identical to the last. Her childhood accident had taught her to
navigate
by landmarks, but here those skills failed her. The Grove refused to be mapped by mortal understanding. The breathing grew louder, accompanied by what might have been
footsteps
if feet could fall without disturbing so much as a blade of grass. Whatever moved through the darkness did so with the confidence of something at home in this space between worlds. Something that belonged here in ways she never could. The pendant burned now, hot enough that she almost tore it from her neck. But its warmth was the only real thing left in this place where reality bent like heated glass. She clutched it tighter, letting its crimson glow seep between her fingers like drops of light blood. That's when she saw them—eyes
reflecting that glow
, watching her from behind the nearest standing stone. Not human eyes. They held too much knowledge, too much patience. They belonged to something that had been waiting far longer than any mortal creature could wait, something that measured time in centuries rather than heartbeats. The eyes blinked—a slow, deliberate gesture that somehow conveyed amusement. More eyes opened around the Grove's perimeter. Dozens of them, all fixed on her with that same terrible patience. They formed a circle around her, hemming her in like the stones themselves. Some floated at human height, others clustered near the ground or hung impossibly in the air above. All of them watched with the steady intensity of hunters who had already decided on their prey. Rory's mouth went dry. The pendant's heat spread up her neck, down her arms, until her whole body thrummed with its alien warmth. The wrongness she'd felt from the moment she entered
crystallized
into certainty—she was not alone. She had never been alone here. The Grove itself
was watching
, breathing, waiting. The eyes
began to
move, circling her with predatory grace. Not rushing, not attacking—simply closing the distance with inevitable purpose. Whatever they belonged to remained hidden in the shadows between the stones, but she could feel their presence like ice water in her veins. Her scar
throbbed
in time with the pendant's pulse, as if responding to some signal she couldn't hear. The childhood accident that had left its mark seemed
suddenly
significant, as if that long-ago wound had been marking her for this moment. The circle of eyes tightened. The breathing grew louder, multiplying until it sounded like a congregation of lungs working in unison. The Grove pulsed around her like a living heart, its ancient rhythm matching the frantic beat of her own. Rory closed her eyes and gripped the pendant so
tightly
its chain bit into her palm. When she opened them again, the eyes had moved closer still. Close enough now that she could see they belonged to shapes that weren't quite human, weren't quite animal, weren't quite anything she had words for. The Grove held its breath, waiting for her next move in a game whose rules she didn't understand.
Evaluation details
Result
Evaluator
Details
Meta Data
100.0000%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
0
adverbTagCount
0
adverbTags
(empty)
71.4013%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1049
totalAiIsmAdverbs
3
found
0
adverb
"suddenly"
count
2
1
adverb
"tightly"
count
1
highlights
0
"suddenly"
1
"tightly"
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)
0.0000%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1049
totalAiIsms
11
found
0
word
"sentinel"
count
1
1
word
"sentinels"
count
1
2
word
"throbbed"
count
1
3
word
"flickered"
count
1
4
word
"loomed"
count
1
5
word
"crystallized"
count
1
6
word
"weight"
count
1
7
word
"dancing"
count
1
8
word
"footsteps"
count
1
9
word
"echo"
count
1
10
word
"navigate"
count
1
highlights
0
"sentinel"
1
"sentinels"
2
"throbbed"
3
"flickered"
4
"loomed"
5
"crystallized"
6
"weight"
7
"dancing"
8
"footsteps"
9
"echo"
10
"navigate"
100.0000%
Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches
1
maxInWindow
1
found
0
label
"sent a shiver through"
count
1
highlights
0
"sent a shiver through"
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
0
narrationSentences
74
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
0
hedgeCount
4
narrationSentences
74
filterMatches
(empty)
hedgeMatches
0
"seemed to"
1
"began to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
1
totalSentences
74
matches
0
"reflecting that glow"
71.0040%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
24
mean
43.21
std
17.22
cv
0.399
sampleLengths
0
64
1
53
2
51
3
49
4
4
5
65
6
54
7
38
8
16
9
18
10
54
11
38
12
58
13
52
14
49
15
52
16
10
17
66
18
51
19
44
20
41
21
40
22
52
23
18
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
0
totalSentences
74
matches
(empty)
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
3
totalVerbs
171
matches
0
"was calling"
1
"were pressing"
2
"was watching"
85.4284%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
1048
adjectiveStacks
2
stackExamples
0
"lay heavy against her"
1
"absolute, pressing against her"
adverbCount
45
adverbRatio
0.042938931297709926
lyAdverbCount
14
lyAdverbRatio
0.013358778625954198
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
74
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
74
mean
14.01
std
6.01
cv
0.429
sampleLengths
0
23
1
18
2
23
3
4
4
13
5
18
6
18
7
20
8
17
9
14
10
11
11
21
12
17
13
4
14
18
15
13
16
9
17
13
18
12
19
11
20
12
21
1
22
30
23
6
24
5
25
12
26
15
27
16
28
7
29
11
30
8
31
13
32
17
33
16
34
8
35
13
36
17
37
21
38
12
39
16
40
9
41
24
42
19
43
9
44
14
45
18
46
17
47
16
48
3
49
8
56.7568%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
8
diversityRatio
0.40540540540540543
totalSentences
74
uniqueOpeners
30
100.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
0
fancyCount
0
fancyTags
(empty)
87.3289%