NC Bench
Overview
About
Tests
Models
Vendors
Run: 2026-02-17-01KHMMFY1J8DN3Z0K3NHZTEH8S
Run Details
Model:
Claude 3.5 Sonnet
Test:
Bad Writing Habits
Scenario:
Horror: alone in an eerie place at night
Duration:
37.2s
Cost:
$0.040638
Provider:
Amazon Bedrock
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
like ancient teeth against the night sky as Rory approached the grove's entrance. Her heartbeat quickened - she'd only ever come here during daylight hours before. But the pendant had been pulsing with unusual intensity all evening, and she couldn't ignore it any longer. Moonlight filtered through Richmond Park's centuries-old oaks, casting dappled shadows that
seemed to
writhe across the leaf-strewn path. The Heartstone's warmth pressed against her chest through her thin jacket, its crimson glow visible even through her shirt. She touched it briefly, drawing comfort from its familiar presence. The standing stones grew more distinct as she approached, their weathered surfaces
etched
with spiraling patterns that
seemed to
shift when viewed directly. Rory hesitated at the threshold. Time moved strangely in the grove - what if she emerged days later? But the pendant's insistent pulse spurred her forward. As she stepped between the stones, the air changed. The ambient sounds of London - distant traffic, the hum of aircraft, the urban wind - fell away
completely
. The silence pressed against her eardrums like cotton wool. Even her
footsteps
seemed muffled as she walked deeper into the grove. Wildflowers b
loomed
impossibly in the November night, their petals
luminous
under the strange, filtered moonlight. The scent was overwhelming - too sweet, too thick, like perfume in a funeral home. Rory's hand strayed to her left wrist, fingers tracing the familiar crescent scar there. Something rustled in the undergrowth behind her. She spun, heart hammering, but saw only shadows between the trees. The pendant's warmth had increased to an almost uncomfortable level. "Hello?" Her voice sounded wrong - flat and dead in the unnatural quiet. No response, but as she turned back to the path, she caught a
flicker
of movement at the edge of her vision. When she looked directly at it, there was nothing there. Just flowers and shadows and the increasingly
oppressive
darkness between the trees. The grove wasn't large - she'd walked its circumference several times before - but tonight it
seemed to
stretch endlessly. The standing stones that marked the exit should have been visible, but she could no longer see them. The pendant's pulse had synchronized with her racing heart. A soft sound reached her ears - like breathing, but not quite. More like the whisper of
silk
against
silk
, or scales against stone. It
seemed to
come from everywhere and nowhere at once. Rory forced herself to stand still, closing her eyes to focus on the sound. When she opened them again, the flowers had changed. Where before they had been a riot of colors, now they were all the same shade of deep crimson - the exact color of her pendant. They
seemed to
pulse in time with it, their petals opening and closing like tiny, hungry mouths. The sweet smell had taken on a metallic edge. Something brushed against the back of her neck - light as a spider's web, cold as grave dirt. Rory jerked away, her hand flying to the spot, but there was nothing there. Nothing visible, at least. But she could feel it now - eyes watching from every direction. The darkness between the trees had become absolute, as if the grove was
slowly
being swallowed
by a void. The whispering sound grew louder, resolving into almost-words that scraped at the edges of comprehension. Her breath came in short, sharp gasps that frosted in the
suddenly
frigid air. The pendant burned against her skin, its glow now bright enough to cast shadows. A twig snapped behind her - a mundane sound that sparked primitive terror. Rory broke into a run, no longer caring about direction or purpose. The crimson flowers
seemed to
reach for her as she passed, their petals brushing against her legs like grasping fingers. The whispering followed, growing in volume and urgency. Her foot caught on something - a root, a stone, a hand reaching from the earth - and she stumbled. As she fought to regain her balance, she saw them. Figures in the darkness between the trees, tall and wrong, moving in ways that hurt her eyes to witness. The pendant's light caught them for just a moment, revealing shapes that her mind refused to process. Rory ran. The grove
seemed to
twist around her, paths splitting and rejoining in impossible ways. The crimson flowers multiplied, their pulsing light drowning out the pendant's glow. The whispering had become a chorus, and now she could almost understand the words. Almost, but not quite, and that was perhaps the most terrifying thing of all. When the standing stones finally appeared ahead of her, she nearly wept with relief. She burst through them at full speed, not slowing until the familiar sounds of London rushed back in. Only then did she dare to look back. The grove looked peaceful in the moonlight. Ordinary. But as she watched, a single crimson petal drifted out between the stones and landed at her feet. When she bent to examine it, it crumbled to ash at her touch. The pendant's pulse had stopped
completely
. Rory touched it gingerly through her shirt, feeling only the normal, cool surface of the stone. But she could still hear the whispers, just at the edge of memory, trying to tell her something she wasn't ready to know.
created_at
"2026-02-17T01:48:08.058993+00:00"
2/17/2026, 1:48:08 AM
model
"anthropic/claude-3.5-sonnet"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
940
moderation_latency
145
generation_time
37030
tokens_prompt
812
tokens_completion
1345
native_tokens_prompt
838
native_tokens_completion
1187
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
0.040638
router
(null)
provider_responses
0
id
"40064588-156d-4bb2-ada9-3af5b2aa1110"
status
200
is_byok
false
latency
904
endpoint_id
"d4fb79bd-9786-4932-af81-b83040e9f4e4"
provider_name
"Amazon Bedrock"
model_permaslug
"anthropic/claude-3.5-sonnet"
api_type
"completions"
id
"gen-1771292850-ehJs7c7maugZU179KdUh"
upstream_id
"40064588-156d-4bb2-ada9-3af5b2aa1110"
total_cost
0.040638
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Amazon Bedrock"
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)
54.2857%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
875
totalAiIsmAdverbs
4
found
0
adverb
"completely"
count
2
1
adverb
"slowly"
count
1
2
adverb
"suddenly"
count
1
highlights
0
"completely"
1
"slowly"
2
"suddenly"
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)
8.5714%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
875
totalAiIsms
8
found
0
word
"luminous"
count
1
1
word
"flicker"
count
1
2
word
"oppressive"
count
1
3
word
"loomed"
count
1
4
word
"silk"
count
2
5
word
"footsteps"
count
1
6
word
"etched"
count
1
highlights
0
"luminous"
1
"flicker"
2
"oppressive"
3
"loomed"
4
"silk"
5
"footsteps"
6
"etched"
100.0000%
Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches
0
maxInWindow
0
found
(empty)
highlights
(empty)
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
0
narrationSentences
66
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
0
hedgeCount
7
narrationSentences
66
filterMatches
(empty)
hedgeMatches
0
"seemed to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
0
totalSentences
66
matches
(empty)
29.8035%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
19
mean
46.68
std
11.87
cv
0.254
sampleLengths
0
48
1
47
2
49
3
49
4
44
5
28
6
13
7
44
8
47
9
57
10
52
11
67
12
43
13
53
14
66
15
56
16
40
17
39
18
45
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
1
totalSentences
66
matches
0
"being swallowed"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
0
totalVerbs
141
matches
(empty)
78.4401%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
874
adjectiveStacks
0
stackExamples
(empty)
adverbCount
56
adverbRatio
0.06407322654462243
lyAdverbCount
18
lyAdverbRatio
0.020594965675057208
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
66
echoCount
0
echoWords
(empty)
90.9768%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
66
mean
13.44
std
5.07
cv
0.377
sampleLengths
0
17
1
13
2
18
3
18
4
19
5
10
6
23
7
5
8
13
9
8
10
9
11
19
12
9
13
12
14
15
15
15
16
14
17
7
18
11
19
10
20
13
21
22
22
10
23
12
24
20
25
18
26
9
27
12
28
12
29
10
30
14
31
9
32
26
33
17
34
9
35
18
36
14
37
4
38
12
39
19
40
15
41
14
42
14
43
13
44
12
45
20
46
8
47
20
48
10
49
19
52.5253%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
7
diversityRatio
0.3787878787878788
totalSentences
66
uniqueOpeners
25
100.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
0
fancyCount
0
fancyTags
(empty)
83.2119%