NC Bench
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Run: 2026-02-17-01KHMRB9Q0TRFTWE19MCRM4DHB
Run Details
Model:
Claude Sonnet 4.5
Test:
Bad Writing Habits
Scenario:
Fantasy: entering an ancient ruin
Duration:
35.1s
Cost:
$0.032571
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> <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
Messages
Meta
AI
The moment Rory stepped between the standing oaks, the air changed—became thick, honeyed, clinging to her skin like morning dew that refused to evaporate. She paused, one hand instinctively reaching for the Heartstone pendant beneath her jacket. The crimson gem pulsed once against her sternum, then went still. Not a portal, then. Something else entirely. "The Grove welcomes few," came Isolde's whisper from somewhere ahead, though the Half-Fae had been walking beside her only seconds ago. The silver-haired woman materialized from between wildflowers that hadn't existed a breath before, her pale lavender eyes reflecting light that came from no visible source. "Fewer still return unchanged." Behind Rory, Nyx rippled into solidity, their violet-eyed silhouette solidifying enough to almost pass for human in the strange amber-
tinged
light. The Shade's form
flickered
at the edges like a candle flame in a draft. "This place..." Nyx's voice carried on wind that didn't move the grass. "It remembers." The Grove stretched before them, impossibly vast for a clearing that shouldn't exist within Richmond Park's borders. Wildflowers bloomed in defiance of December's grip on the world outside—lupines and foxglove, nightshade and moonflower, species that should never share the same soil or season. The petals glowed faintly, as if each contained a fragment of captured starlight. Rory knelt, reaching toward a cluster of forget-me-nots. The moment her fingers brushed the petals, images flooded her mind—lovers meeting in secret, a child's laughter, blood on stone, a woman weeping. She jerked her hand back, breathing hard. "Everything here holds memory," Isolde said, not quite answering the question Rory hadn't asked. "What was, what is, what might have been. The Grove stands where three paths meet, and all paths remember their travelers." "Comforting," Rory muttered, wiping her palm on her jeans as if she could scrub away the phantom sensations. She straightened, forcing her analytical mind to catalog details instead of drowning in the
otherworldly
atmosphere. The sky overhead was wrong—not quite the grey overcast of London in winter, but a warm amber that reminded her uncomfortably of the descriptions she'd heard of Dymas. The comparison made her stomach tighten. They moved deeper, and Rory
noticed that Isolde
left no impression in the grass behind her. The Fae woman
glided
rather than walked, her silver hair floating
slightly
as if submerged in invisible water. Nyx, by contrast, left shadows in their wake—dark impressions that lingered several seconds before fading. Rory's own
footsteps
made no sound. "Is it always this quiet?" she asked, then immediately regretted speaking. Her voice fell flat, absorbed by the air itself. "The Grove decides what it will share." Isolde paused before a massive oak at the clearing's heart. The tree's trunk was easily twenty feet across, its bark silver-white like birch but striated with what looked like veins of quartz. Symbols had
been carved
into the wood—ancient, twisting marks that hurt to look at directly. "First tongue. Before mortal speech, before even the Fae learned to name themselves." Nyx drifted closer to the tree, extending one shadowy hand toward the markings. The moment they made contact, the symbols flared with cold white light. The Shade recoiled, their form destabilizing into wisps of shadow before reforming several feet away. "It rejects me," they whispered, something like hurt threading through their voice. "I am neither what I was nor what I might have been. The between-space knows its own." "All are known here," Isolde corrected, though her riddle-speech offered little comfort. "What rejects and what accepts—two faces of the same truth." Rory moved past both of them, approaching the tree from a different angle. Her fingers found the Fae-forged blade at her hip, the moonsilver dagger cold even through the leather sheath. Isolde had given it to her three days ago with a warning she still didn't fully understand: "When the boundary frays, cold iron will preserve what warmth would consume." Around the oak's base, roots erupted from the earth in a chaotic tangle, forming natural archways and hollows. In one such hollow, something glinted. Rory crouched, peering into the darkness. Small objects nestled among the roots—a tarnished copper ring, a child's wooden toy, a key so old its teeth had worn smooth, a photograph bleached white by time or magic. "Offerings," she said, understanding dawning. "People leave pieces of themselves here." "What is given freely may be found again." Isolde appeared at her shoulder, silent as thought. "What is taken by force is lost forever. The Grove keeps its own counsel on which is which." A sound rippled through the clearing—not quite music, not quite wind. It raised the hair on Rory's arms and made the Heartstone pendant warm against her skin. She stood
quickly
, scanning the tree line. The flowers seemed brighter now, their glow intensifying. "Something's changing," Nyx said, their form coalescing more solidly, as if preparing for threat or flight. The amber light overhead deepened, took on
weight
. Rory felt pressure building in her chest, behind her eyes. The air tasted of copper and honey and something older than either—something that had no name in any language she knew. The symbols on the oak
began to
move, rearranging themselves in slow spirals. "The Grove wakes," Isolde said simply. Her voice carried no fear, but Rory caught the subtle shift in her posture, the way her fingers traced a warding gesture in the air. "It has sensed what we carry. What we seek. What we fear to find." The ground beneath Rory's feet
trembled
. Not an earthquake—something more deliberate, more conscious. A greeting or a warning, she couldn't tell. Between the standing oaks that marked the boundary, the air
shimmered
like heat haze. Through that distortion, she caught glimpses of other places—a rain-soaked London street, a hall of feasting tables piled with impossible foods, a vast library where books wrote themselves, a frozen wasteland where stars fell upward into an inverted sky. "What is this place?" Rory breathed, unable to look away from the shifting visions. "The crossroads," Isolde answered, and for once her words came clear and direct. "Where all paths meet. Where the Veil grows thin enough to see through, but not—quite—thin enough to pass." She turned those pale lavender eyes on Rory, and in them reflected all the strange light of the Grove. "You asked to understand what lies beyond the boundary. The Grove obliges. But understanding and crossing are different things entirely." The pressure intensified. Rory's ears popped. The Heartstone pendant pulsed in rhythm with her heartbeat, growing warmer with each beat. Beside her, Nyx's form rippled violently, as if the Shade fought to maintain cohesion against forces pulling them apart. "How long?" Rory
managed to
ask. "How long have we been here?" Isolde's smile
was sad
and knowing. "Time is the first thing the Grove takes. Minutes or days—the boundary cares nothing for mortal measures." The symbols on the oak blazed bright enough to leave afterimages. The flowers' glow became almost unbearable. And in that moment of overwhelming light, Rory finally understood why so few who entered the Grove returned unchanged. It wasn't that the place transformed them. It
was that the
Grove showed them what they already were, stripped of all the comfortable lies they told themselves. And some truths, once seen, could never be forgotten.
created_at
"2026-02-17T02:55:28.288132+00:00"
2/17/2026, 2:55:28 AM
model
"anthropic/claude-4.5-sonnet-20250929"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2473
moderation_latency
171
generation_time
34833
tokens_prompt
1590
tokens_completion
1953
native_tokens_prompt
1757
native_tokens_completion
1820
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
0.032571
router
(null)
provider_responses
0
id
"ecda8eeb-577e-4bee-ae65-e95e8baed881"
status
200
is_byok
false
latency
2471
endpoint_id
"d8bee848-f020-454a-b2be-4a7ce868f99f"
provider_name
"Amazon Bedrock"
model_permaslug
"anthropic/claude-4.5-sonnet-20250929"
api_type
"completions"
id
"gen-1771296892-5xuaqe3yGDIIPta3r3NV"
upstream_id
"ecda8eeb-577e-4bee-ae65-e95e8baed881"
total_cost
0.032571
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Amazon Bedrock"
Evaluation details
Result
Evaluator
Details
Meta Data
0.0000%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
10
adverbTagCount
6
adverbTags
0
"came Isolde's whisper from somewhere ahead, though the Half-Fae had been walking beside her only seconds ago [somewhere only]"
1
"Isolde said, not quite answering the question Rory hadn't asked [quite]"
2
"Rory muttered, wiping her palm on her jeans as if she could scrub away the phantom sensations [away]"
3
"Nyx said, their form coalescing more solidly, as if preparing for threat or flight [more solidly]"
4
"Isolde said simply [simply]"
5
"Isolde answered, and for once her words came clear and direct [once]"
83.7925%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1234
totalAiIsmAdverbs
2
found
0
adverb
"quickly"
count
1
1
adverb
"slightly"
count
1
highlights
0
"quickly"
1
"slightly"
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)
35.1702%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1234
totalAiIsms
8
found
0
word
"tinged"
count
1
1
word
"flickered"
count
1
2
word
"shimmered"
count
1
3
word
"glided"
count
1
4
word
"trembled"
count
1
5
word
"otherworldly"
count
1
6
word
"weight"
count
1
7
word
"footsteps"
count
1
highlights
0
"tinged"
1
"flickered"
2
"shimmered"
3
"glided"
4
"trembled"
5
"otherworldly"
6
"weight"
7
"footsteps"
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
1
narrationSentences
75
matches
0
"was sad"
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
0
hedgeCount
2
narrationSentences
75
filterMatches
(empty)
hedgeMatches
0
"began to"
1
"managed to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
2
totalSentences
87
matches
0
"noticed that Isolde"
1
"was that the"
96.7256%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
31
mean
38.97
std
19.04
cv
0.489
sampleLengths
0
55
1
50
2
35
3
14
4
56
5
38
6
35
7
68
8
49
9
6
10
20
11
67
12
40
13
29
14
22
15
60
16
60
17
11
18
34
19
42
20
16
21
52
22
45
23
74
24
14
25
70
26
39
27
12
28
23
29
43
30
29
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
1
totalSentences
75
matches
0
"been carved"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
0
totalVerbs
175
matches
(empty)
86.0821%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
999
adjectiveStacks
1
stackExamples
0
"strange amber-tinged light."
adverbCount
49
adverbRatio
0.04904904904904905
lyAdverbCount
17
lyAdverbRatio
0.01701701701701702
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
87
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
87
mean
13.89
std
7.5
cv
0.54
sampleLengths
0
24
1
13
2
11
3
4
4
3
5
21
6
25
7
4
8
21
9
14
10
12
11
2
12
17
13
26
14
13
15
8
16
23
17
7
18
14
19
21
20
18
21
16
22
28
23
6
24
16
25
18
26
15
27
6
28
11
29
9
30
17
31
22
32
15
33
13
34
13
35
12
36
15
37
12
38
17
39
12
40
10
41
13
42
18
43
29
44
18
45
6
46
6
47
30
48
5
49
6
57.4713%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
10
diversityRatio
0.41379310344827586
totalSentences
87
uniqueOpeners
36
0.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
10
fancyCount
9
fancyTags
0
"came Isolde's whisper from somewhere ahead, though the Half-Fae had been walking beside her only seconds ago (come walk)"
1
"Isolde said, not quite answering the question Rory hadn't asked (say, does not quite answer does not ask)"
2
"Rory muttered, wiping her palm on her jeans as if she could scrub away the phantom sensations (mutter, wipe scrub away)"
3
"they whispered, something like hurt threading through their voice (whisper, like hurt threading)"
4
"Isolde corrected, though her riddle-speech offered little comfort (correct, offer)"
5
"she said, understanding dawning (say, dawn)"
6
"Nyx said, their form coalescing more solidly, as if preparing for threat or flight (say, coalesce more solidly, prepare)"
7
"Isolde said simply (say simply)"
8
"Isolde answered, and for once her words came clear and direct (answer, come)"
79.9554%