NC Bench
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Run: 2026-02-17-01KHMQE6P366JVN3WVWRSRV1WF
Run Details
Model:
Claude Opus 4.5
Test:
Bad Writing Habits
Scenario:
Romance: separated couple reunites
Duration:
54.4s
Cost:
$0.069695
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="4415" name="Lucien Moreau" aliases="Lucien, Luc, the Frenchman" pronouns="he/him" species="Half-Demon" storyRole="Ally"> <eyeColor>heterochromatic — one amber, one black</eyeColor> <hair>slicked-back platinum blond</hair> <height>5'11"</height> <age>32</age> <cane>ivory-handled cane that conceals a thin blade</cane> <dress>tailored charcoal suits</dress> <description>An impeccably dressed fixer and information broker in London's supernatural underworld. He speaks four languages fluently.</description> <backstory>Born in Marseille to a human mother and a demon father from the realm of Avaros.</backstory> </character> <location id="858" name="Eva's Flat" aliases="Eva's place, the flat on Brick Lane" realm="Earth"> <cat>tabby cat named Ptolemy</cat> <security>three deadbolts on the front door</security> <description>A cramped one-bedroom flat above a curry house on Brick Lane, East London. Every surface is covered with books, scrolls, and research notes.</description> </location> </codex> Write a fully fleshed out scene of at least 1000 words in the romance genre. Two people who parted on complicated terms are forced together again when one shows up unannounced at the other's flat. There's history between them — attraction, hurt, and things left unsaid. Write the scene from the moment the door opens. Use the codex entries above as your world reference for characters and setting. Only include the prose of the scene without any markdown or commentary.
Model response
Messages
Meta
AI
The door swung open, and Rory's hand froze on the handle. Lucien Moreau stood in the narrow hallway, one shoulder propped against the peeling wallpaper as if he'd been waiting for hours rather than the thirty seconds since he'd knocked. The amber eye caught the light from Eva's flat; the black one swallowed it whole. He looked exactly as she remembered—platinum hair slicked back with mathematical precision, charcoal suit cut so sharp it could draw blood, ivory-handled cane tucked under his arm like an afterthought. "Bonsoir, Aurora." She hadn't
heard that voice
in four months. Four months since she'd walked out of the Velvet Archive without looking back, since she'd told him exactly what she thought of his methods and his secrets and his insufferable habit of treating her like a chess piece on his board. "No," she said, and moved to close the door. His hand came up—not touching, never touching without permission, that had always been his way—but close enough that she stopped. "Five minutes. That's all I'm asking." "You don't ask, Lucien. You maneuver." Something
flickered
across his mismatched eyes. If she didn't know better, she might have called it hurt. "Fair. But I'm asking now." Behind her, Ptolemy meowed from his perch on a stack of medieval grimoires, the sound plaintive and curious. Rory glanced back at the tabby, at Eva's cluttered flat with its towers of books and scrolls covering e
very
surface, and weighed her options. She could slam the door. She could pretend the last year hadn't happened—the Whitmore case, the thing in the tunnels beneath King's Cross, the night they'd almost— She stepped back. "Five minutes. Clock's running." Lucien moved past her with that fluid grace that had always set her teeth on edge. Too smooth. Too controlled. He took in the cramped space with a single sweep of his gaze—the three deadbolts on the door, the curry-scented air drifting up from the restaurant below, the organized chaos of Eva's research scattered across the coffee table. "Your friend isn't home," he observed. "Obviously. She's in Prague until Thursday." Rory crossed her arms over her chest. "How did you know I'd be here?" "You always water her plants when she travels." He turned to face her, and the overhead light threw shadows across his angular face. "The ivy on the fire escape was looking rather vigorous as I walked past." "That's not creepy at all." "I prefer 'observant.'" "You would." Silence stretched between them, thick and weighted. Ptolemy jumped down from his book stack and wound between Lucien's legs, purring. Traitor, Rory thought. The cat had always liked him. "You look well," Lucien said quietly. "Don't." "Don't what?" "Don't do the pleasant small talk thing. You didn't come here at nine o'clock on a Wednesday to discuss my health." She moved toward the kitchen alcove, putting the narrow counter between them. Distance. She needed distance. "Say what you came to say." Lucien set his cane against Eva's cluttered desk—careful not to disturb her papers, she noticed—and unbuttoned his jacket. The gesture was so achingly familiar that something twisted in Rory's chest. How many times had she watched him do exactly that in his office, in that dim back room at the Crow's Nest, in the car outside the Ashford estate while rain hammered the windshield and she'd been stupid enough to believe they were on the same side? "There's a situation," he said. "One that requires your particular skill set." "I'm not for hire." "I'm not offering payment." Rory laughed, and it came out sharper than she intended. "Right. Because the great Lucien Moreau does favors out of the goodness of his heart." "I have a heart?" "Jury's still out." He moved toward her then—two steps, no more—and stopped when her shoulders went rigid. His jaw tightened. "I deserved that." "You deserve a lot of things. A list I'd be happy to provide if you've got the time." "Aurora—" "Don't call me that." The words came out rough, scraped raw against her throat. "You don't get to call me that anymore." The silence that followed was different. Heavier. Lucien's expression shifted, and for just a moment, the mask slipped. She saw something underneath—exhaustion, regret, something that looked dangerously close to longing. "Rory, then." His voice was soft in a way she'd only heard once before, in a darkened hallway while blood dried on her hands and the thing they'd killed cooled on the floor between them. "I made a mistake. Several mistakes. I should have told you about the Marchetti connection. I should have trusted you with the full picture instead of parceling out information like you were an asset to be managed." "Yes. You should have." "I was trying to protect you." "I don't need your protection." She gripped the edge of the counter, feeling the crescent-shaped scar on her left wrist press against the laminate. Childhood accident, she always told people. Nothing that mattered. But her fingers found it now anyway, that familiar curve of raised skin. "I needed your honesty." "I know." He took a breath—deliberate, controlled, the way he did e
very
thing. "I know that now." Ptolemy had settled on the arm of Eva's threadbare sofa, watching them with the unblinking attention of a creature who'd seen far stranger things than two people
dancing
around the wreckage of whatever they'd almost been to each other. Rory's phone buzzed in her pocket. She ignored it. "Four months," she said. "Not a word. Not a message. And now you show up at my friend's flat talking about situations and skill sets like nothing happened." "Like nothing—" Lucien broke off, and something dangerous flared in his mismatched eyes. "You think I stayed away because nothing happened?" "I think you stayed away because you're a coward who'd rather disappear than have an actual conversation about—" "About what?" He closed the distance between them before she could react, stopping just short of the counter that separated them. "About the fact that I've thought about you e
very
day since you walked out? About the way you looked at me in that hallway like I'd broken something neither of us knew how to fix?" "Lucien—" "About the fact that I can still feel exactly where you touched my face, right here—" He pressed two fingers to his cheekbone, the gesture almost violent in its precision. "—and I haven't been able to feel much of anything else since?" The words hung in the cramped flat, tangling with the smell of curry and old paper and something else underneath—sandalwood and smoke, his cologne, exactly as she remembered. "That's not fair," Rory said, and her voice had gone quiet in a way she hadn't intended. "None of this is fair." He lowered his hand. "I'm half-demon, Aurora. Rory. Whatever you'll let me call you. My father's blood makes me
very
good at
calculating
odds and manipulating situations and keeping e
very
one at a careful distance. It does not make me good at—" He stopped, jaw working. "This." "This?" "Wanting someone so much it terrifies me." Rory stared at him. Beneath the perfect suit and the careful posture, she could see it now—the tension in his shoulders, the slight tremor in his hands. Lucien Moreau, the unflappable fixer who'd faced down demons and crime lords and things with too many teeth,
was nervous
. "You hurt me," she said. "When I found out about Marchetti. When I realized how much you'd kept from me." "I know." "I trusted you. Against my better judgment, against e
very
thing that experience had taught me about men who keep secrets and treat honesty like currency—I trusted you." "I know." His voice cracked on the second word. "And I have spent four months trying to figure out how to
earn that back
." "Is that why you're here? To earn something?" "No." He reached up, and for a moment she thought he might touch her. But his hand stopped short, hovering in the space between them. "I'm here because there's a girl in Whitechapel who's going to die if someone doesn't find her in the next forty-eight hours. Someone with ties to the same people who tried to kill you last spring. And I could find another way. I could pull strings and call in favors and handle it myself." His mismatched eyes held hers. "But I don't want to do this without you. I don't want to do any of it without you anymore." The radiator clicked on, filling the silence with a metallic hum. Outside, Brick Lane
was coming
alive with the evening crowd—laughter, car horns, the distant thump of bass from some bar down the street. Inside Eva's flat, the world had narrowed to the space between them. Rory let out a slow breath. "Tell me about the girl." Something shifted in Lucien's expression—hope, maybe, fragile as spun glass. "Her name is Mira Okonkwo. Seventeen. She went missing three days ago, and the trail leads somewhere neither of us wants it to go." "Where?" "The Ashford family." He said the name like it tasted of ash. "Which means I need someone who can think sideways. Someone who doesn't play by any rules they recognize." "Flattery isn't going to fix things between us." "I know." He picked up his cane from Eva's desk, fingers wrapping around the ivory handle. "But I thought it might be a start." Rory looked at him—
really
looked, past the armor of his tailored suit and careful control—and saw the truth of it. He
was asking
, not maneuvering. Hoping, not
calculating
. It didn't erase what he'd done. It didn't rebuild the trust he'd broken. But it was a start. "There's a curry place downstairs," she said. "We can talk there."
"Is that a
yes?" "It's a maybe." She moved past him toward the door, close enough to catch that familiar scent of sandalwood and smoke. "But Lucien? If you keep things from me again—" "I won't." She paused with her hand on the first deadbolt. "Because if you do, I won't walk away next time. I'll make you regret it." The smile that crossed his face was small and genuine and something she'd never seen from him before. "I would expect nothing less." Rory turned the first lock, then the second, then the third. Behind her, Ptolemy meowed his goodbye as Lucien followed her into the hallway, and somewhere in the back of her mind, a voice that sounded like her mother
whispered that she
was making
a terrible mistake. But as they descended the narrow stairs toward the curry house below, and Lucien's shoulder brushed hers in the tight space, Rory found she didn't particularly care.
created_at
"2026-02-17T02:39:54.200489+00:00"
2/17/2026, 2:39:54 AM
model
"anthropic/claude-4.5-opus-20251124"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1742
moderation_latency
150
generation_time
53795
tokens_prompt
808
tokens_completion
2747
native_tokens_prompt
854
native_tokens_completion
2617
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
0.069695
router
(null)
provider_responses
0
id
"c02a2266-97b4-4af4-b673-cbbc14b113d5"
status
200
is_byok
false
latency
1742
endpoint_id
"de32581c-2e11-4f54-8d29-e8a6e19d3038"
provider_name
"Amazon Bedrock"
model_permaslug
"anthropic/claude-4.5-opus-20251124"
api_type
"completions"
id
"gen-1771295939-nHOjtycCs6aiRrhh8BMx"
upstream_id
"c02a2266-97b4-4af4-b673-cbbc14b113d5"
total_cost
0.069695
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
10
adverbTagCount
1
adverbTags
0
"Lucien said quietly [quietly]"
88.8641%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1796
totalAiIsmAdverbs
2
found
0
adverb
"really"
count
1
1
adverb
"very"
count
1
highlights
0
"really"
1
"very"
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)
72.1604%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1796
totalAiIsms
5
found
0
word
"flickered"
count
1
1
word
"velvet"
count
1
2
word
"calculating"
count
2
3
word
"dancing"
count
1
highlights
0
"flickered"
1
"velvet"
2
"calculating"
3
"dancing"
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
87
matches
0
"was nervous"
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
0
hedgeCount
0
narrationSentences
87
filterMatches
(empty)
hedgeMatches
(empty)
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
4
totalSentences
142
matches
0
"heard that voice"
1
"earn that back"
2
"\"Is that a"
3
"whispered that she"
100.0000%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
76
mean
23.32
std
21.71
cv
0.931
sampleLengths
0
11
1
74
2
2
3
49
4
9
5
26
6
6
7
22
8
69
9
7
10
58
11
6
12
20
13
37
14
5
15
3
16
2
17
29
18
6
19
1
20
2
21
43
22
77
23
12
24
4
25
4
26
25
27
4
28
3
29
20
30
18
31
1
32
22
33
30
34
72
35
4
36
6
37
50
38
16
39
39
40
9
41
28
42
21
43
18
44
56
45
1
46
42
47
28
48
17
49
51
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
0
totalSentences
87
matches
(empty)
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
3
totalVerbs
185
matches
0
"was coming"
1
"was asking"
2
"was making"
100.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
1112
adjectiveStacks
0
stackExamples
(empty)
adverbCount
38
adverbRatio
0.0341726618705036
lyAdverbCount
10
lyAdverbRatio
0.008992805755395683
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
142
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
142
mean
12.48
std
10.94
cv
0.877
sampleLengths
0
11
1
29
2
15
3
30
4
2
5
8
6
41
7
9
8
20
9
6
10
6
11
6
12
11
13
5
14
18
15
24
16
5
17
22
18
3
19
4
20
16
21
2
22
2
23
38
24
6
25
13
26
7
27
23
28
14
29
5
30
3
31
2
32
7
33
13
34
3
35
6
36
6
37
1
38
2
39
33
40
1
41
3
42
6
43
18
44
12
45
47
46
5
47
7
48
4
49
4
58.2160%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
14
diversityRatio
0.4084507042253521
totalSentences
142
uniqueOpeners
58
50.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
10
fancyCount
5
fancyTags
0
"she said, and moved to close the door (say, move close)"
1
"he observed (observe)"
2
"Lucien said quietly (say quietly)"
3
"pressed (pressed)"
4
"Rory said, and her voice had gone quiet in a way she hadn't intended (say, go does have not)"
92.3083%