NC Bench
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Run: 2026-02-17-01KHMMKQX1VXRGHYR4X3168SJF
Run Details
Model:
Claude 3.7 Sonnet
Test:
Bad Writing Habits
Scenario:
Romance: separated couple reunites
Duration:
48.2s
Cost:
$0.040542
Provider:
Anthropic
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
Aurora almost knocked over her cup of tea when the knocking came. Three sharp raps against the wood, authoritative and unmistakable. Eva wasn't due back for hours, and no one else knew she was here. She set the mug down beside her stack of textbooks and padded toward the door in sock-clad feet. The old floorboards creaked beneath her
weight
. The curry scent from the restaurant below had
see
ped into e
very
thing—the walls, the furniture, her clothes. It wasn't unpleasant, just persistent, like most things in this part of London. Aurora peered through the peephole and her heart stuttered. She'd
recognize that platinum
blond hair anywhere. Her fingers hesitated over the first deadbolt, then the second, then the third. Each click felt like a countdown to something inevitable. She pulled open the door just enough to reveal herself, but not enough to be an invitation. "Lucien." His name came out steadier than she expected. He stood in the narrow hallway, immaculate in a charcoal suit that looked like it cost more than three months of her deli
very
job salary. One hand rested on his ivory-handled cane, the other hung at his side. He looked exactly as she remembered, yet somehow more. More intense. More present. More e
very
thing. "Aurora." His voice rolled over her name with that slight French accent that used to make her stomach flip. "May I come in?" She hesitated. "How did you know I was here?" The corner of his mouth twitched upward. "Information is my currency, chérie. You know this." Aurora's fingers tensed on the door frame. "That's not an answer." "Your friend's cat has a
very
distinctive meow. I heard it in the background when you called Silas about your shift tomorrow." His heterochromatic eyes—one amber, one black—met hers directly. "The rest was simple deduction." Of course it was. Nothing was ever simple with Lucien. "Eva isn't home," she said. "I didn't come to
see
Eva." The words hung between them, heavy with implication. Aurora swallowed and stepped back, opening the door wider. It wasn't forgiveness or even acceptance—just
acknowledgment that whatever
conversation they needed to have wouldn't be had in a hallway that smelled of curry and old carpet. Lucien stepped inside, his cane tapping
lightly
against the floor. Ptolemy appeared from beneath the cluttered coffee table, stretching languorously before padding over to wind around Lucien's ankles. "Traitor," Aurora muttered to the cat. Lucien smiled, just
slightly
, as he surveyed the cramped space. Books
were stacked
on e
very
surface, research notes pinned to walls, and scrolls tucked into the most unlikely places. Eva's organizational system was comprehensible only to her. "You look well," he said, turning back to Aurora. She crossed her arms over her chest,
suddenly
aware of her worn jeans and oversized Cardiff University sweatshirt. Her hair
was pulled
back in a messy ponytail, and she hadn't bothered with makeup. Six months ago, she would have died before letting Lucien
see
her like this. "What do you want?" She aimed for cold but landed somewhere near wary. Lucien set his cane against the wall and unbuttoned his suit jacket with elegant fingers. "To
see
you. To talk." "We did plenty of talking last time." Aurora moved to the kitchenette, needing distance. She busied herself with the electric kettle. "Tea?" "Please." She grabbed a mug from the drying rack—one of Eva's with a pentagram and the words 'Witches Brew' emblazoned on it—and dropped in a tea bag. The mundane task helped steady her nerves. "I've missed you," Lucien said quietly. The words sliced through her
carefully
constructed defenses. Aurora kept her back to him, watching the kettle, refusing to let him
see
how those three simple words affected her. "You made your choice," she finally said. "Half-demon, remember? 'Too dangerous to get attached.' Your words, not mine." "I was wrong." Aurora turned, leaning against the counter. "Were you? Because I remember you being quite convinced. Something about your father's enemies and keeping me safe." Lucien moved toward her, stopping at a respectful distance. In the small flat, that still put him close enough that she could smell his cologne—something expensive and subtle that reminded her of rainy nights and whispered promises. "The situation has changed." He held her gaze. "I've eliminated certain... threats." "Eliminated." Aurora let the word hang. "Do I want to know what that means?" "Probably not." At least he was honest. That had always been Lucien's contradictory nature—a dealer in secrets and shadows who rarely lied to her face. The kettle clicked off. Aurora poured water over the tea bag, watching the dark color bloom and spread. She handed him the mug without meeting his eyes. "Thank you." His fingers brushed hers in the exchange, sending an unwelcome jolt through her system. Ptolemy jumped onto the counter beside Aurora, purring loudly. She stroked the tabby absently, grateful for the distraction. "He remembers me," Lucien observed, sipping his tea. "Cats are drawn to danger." Aurora finally looked up at him. "Why are you
really
here, Lucien? After six months of silence?" Lucien set down his mug and reached into his inner jacket pocket. He withdrew a small
velvet
pouch and placed it on the counter between them. "What is this?" she asked, not touching it. "Protection." He nudged the pouch toward her. "Something I should have given you long ago." Curiosity—always her weakness where Lucien
was concerned
—got the better of her. Aurora picked up the pouch and loosened the drawstring. A pendant slid out onto her palm—a deep blue stone wrapped in
intricate
silver wirework. "Lapis lazuli," Lucien explained. "The silver is mixed with iron and blessed salt. It will shield you from magical tracking and most minor hexes." Aurora stared at the pendant. "Why now?" "Because I was wrong to push you away." His voice dropped lower. "Because I thought I was protecting you by keeping my distance, but I've come to realize that was arrogance." She closed her fingers around the pendant. "And what am I supposed to do with this information?" "Whatever you want." Lucien stepped closer, close enough that she had to tilt her head
slightly
to maintain eye contact. "I'm not asking for forgiveness, Aurora. I'm asking for a chance to explain properly. To start again, perhaps." "Start again," she repeated, the words bitter on her tongue. "After you walked away without looking back?" "I looked back e
very
day." His mismatched eyes held hers, intense and unblinking. "E
very
single day." Aurora felt the familiar pull between them—the gravity that had drawn her to him from their first meeting at Silas's bar. It would be so easy to fall back into orbit around him. Too easy. "I have a life now," she said. "A job. I'm finally moving forward after Evan. I can't just—" "I know about the threats," Lucien interrupted. "The notes left at your deli
very
job. The man who followed you home last Tuesday." Aurora stiffened. "How—" "As I said, information is my currency." His expression hardened. "Someone is watching you, Aurora. Someone connected to your ex." The revelation knocked the air from her lungs. She'd felt eyes on her recently but had convinced herself it was paranoia. The legacy of an abusive relationship—always looking over your shoulder, always waiting for the other shoe to drop. "Evan is in Cardiff," she said, but uncertainty crept into her voice. "His cousin isn't." Lucien's hand moved toward hers but stopped short of touching her. "I'm not here to disrupt your life. I'm here because you may be in danger, and regardless of what happened between us, I will not stand by and allow that." Aurora set the pendant on the counter and rubbed her left wrist, thumb tracing the small crescent-shaped scar there—a reminder of another time she'd underestimated danger. The
weight
of Lucien's words settled over her. "So this is professional concern?" She
tried to
keep her tone light. "Just another day for London's supernatural fixer?" Something flashed in his eyes—frustration, perhaps, or hurt. "No, Aurora. This is me, unable to stay away from the woman I—" He stopped himself, jaw tightening. "This is personal. Entirely personal." The silence that followed was electric. Ptolemy, sensing the tension, jumped down and disappeared into Eva's bedroom. "I don't know what you want me to say," Aurora finally whispered. "Say you'll let me help." Lucien's voice was equally soft. "Say you'll wear the pendant. Say you'll call me if anything feels wrong." He paused, swallowing visibly. "Say you don't hate me for leaving." "I never hated you." Aurora looked down at her hands. "I wanted to. It would have been easier." "Nothing about us was ever easy." The ghost of a smile touched his lips. Aurora picked up the pendant again, feeling its
weight
. Six months of anger, hurt, and longing
churned
inside her. She'd spent so much energy trying to forget Lucien Moreau, only for him to appear at Eva's door like he'd never left. "If I wear this," she said
slowly
, "it doesn't mean anything. It doesn't mean I forgive you or that I'm ready to pick up where we left off." Lucien nodded. "I understand." "And if I call you, it's because I need help, not because..." She trailed off, unable to finish the thought. "Of course." He reached for his cane, straightening his posture. "I should go. I've intruded on your evening long enough." Aurora watched him prepare to leave, and something tightened in her chest. Words bubbled up before she could stop them. "Why did you
really
come tonight, Lucien? The truth." He paused, hand on his cane, looking more vulnerable than she'd ever
see
n him. The
carefully
constructed
facade
of the untouchable fixer cracked just enough for her to glimpse the man beneath. "Because I needed to
see
your face," he admitted. "Because I heard a rumor of danger and the thought of you hurt was... unbearable." He met her gaze directly. "Because six months was too long." Aurora's throat tightened. Despite e
very
thing, despite the pain and the anger, something inside her recognized the truth in his words. It
resonated
with her own sleepless nights and the times she'd caught herself looking for platinum blond hair in crowds. "It was," she agreed
softly
.
created_at
"2026-02-17T01:50:23.565021+00:00"
2/17/2026, 1:50:23 AM
model
"anthropic/claude-3-7-sonnet-20250219"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
553
moderation_latency
(null)
generation_time
48116
tokens_prompt
808
tokens_completion
2709
native_tokens_prompt
854
native_tokens_completion
2532
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
0.040542
router
(null)
provider_responses
0
id
"msg_01YJxRXDQL19F6midACjvCdH"
status
200
is_byok
false
latency
553
endpoint_id
"1347c8dc-12f5-47df-8355-3ec7e80a8c67"
provider_name
"Anthropic"
model_permaslug
"anthropic/claude-3-7-sonnet-20250219"
api_type
"completions"
id
"gen-1771292975-8lDY5qt4ShfQmplzOT6D"
upstream_id
"msg_01YJxRXDQL19F6midACjvCdH"
total_cost
0.040542
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
Evaluation details
Result
Evaluator
Details
Meta Data
8.3333%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
16
adverbTagCount
6
adverbTags
0
"he said, turning back to Aurora [back]"
1
"Lucien said quietly [quietly]"
2
"she finally said [finally]"
3
"Aurora finally whispered [finally]"
4
"she said slowly [slowly]"
5
"she agreed softly [softly]"
35.9721%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1718
totalAiIsmAdverbs
11
found
0
adverb
"carefully"
count
2
1
adverb
"lightly"
count
1
2
adverb
"slightly"
count
2
3
adverb
"slowly"
count
1
4
adverb
"softly"
count
1
5
adverb
"suddenly"
count
1
6
adverb
"really"
count
2
7
adverb
"very"
count
1
highlights
0
"carefully"
1
"lightly"
2
"slightly"
3
"slowly"
4
"softly"
5
"suddenly"
6
"really"
7
"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)
53.4342%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1718
totalAiIsms
8
found
0
word
"facade"
count
1
1
word
"churned"
count
1
2
word
"resonated"
count
1
3
word
"velvet"
count
1
4
word
"intricate"
count
1
5
word
"weight"
count
3
highlights
0
"facade"
1
"churned"
2
"resonated"
3
"velvet"
4
"intricate"
5
"weight"
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
120
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
2
hedgeCount
1
narrationSentences
120
filterMatches
0
"see"
hedgeMatches
0
"tried to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
2
totalSentences
157
matches
0
"recognize that platinum"
1
"acknowledgment that whatever"
100.0000%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
78
mean
21.78
std
12.86
cv
0.591
sampleLengths
0
35
1
54
2
16
3
39
4
9
5
53
6
23
7
9
8
15
9
11
10
35
11
10
12
5
13
6
14
44
15
28
16
6
17
37
18
9
19
47
20
13
21
20
22
22
23
1
24
33
25
6
26
29
27
18
28
3
29
24
30
37
31
12
32
14
33
2
34
23
35
27
36
16
37
18
38
8
39
22
40
26
41
8
42
15
43
35
44
24
45
7
46
31
47
17
48
38
49
17
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
3
totalSentences
120
matches
0
"were stacked"
1
"was pulled"
2
"was concerned"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
0
totalVerbs
218
matches
(empty)
85.1270%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
1181
adjectiveStacks
0
stackExamples
(empty)
adverbCount
66
adverbRatio
0.0558848433530906
lyAdverbCount
25
lyAdverbRatio
0.021168501270110076
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
157
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
157
mean
10.82
std
6.37
cv
0.588
sampleLengths
0
12
1
9
2
14
3
18
4
7
5
16
6
13
7
9
8
7
9
13
10
9
11
17
12
9
13
25
14
13
15
9
16
2
17
2
18
2
19
19
20
4
21
2
22
7
23
7
24
8
25
7
26
4
27
30
28
5
29
4
30
6
31
5
32
6
33
8
34
9
35
27
36
10
37
18
38
6
39
10
40
19
41
8
42
9
43
18
44
15
45
14
46
13
47
15
48
5
49
14
61.5711%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
10
diversityRatio
0.40764331210191085
totalSentences
157
uniqueOpeners
64
0.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
16
fancyCount
13
fancyTags
0
"Aurora muttered to the cat (mutter)"
1
"he said, turning back to Aurora (say, turn)"
2
"Lucien said quietly (say quietly)"
3
"she finally said (finally say)"
4
"Lucien observed, sipping his tea (observe, sip)"
5
"Lucien explained (explain)"
6
"she repeated, the words bitter on her tongue (repeat)"
7
"Lucien interrupted (interrupt)"
8
"she said, but uncertainty crept into her voice (say, creep)"
9
"Aurora finally whispered (finally whisper)"
10
"she said slowly (say slowly)"
11
"he admitted (admit)"
12
"she agreed softly (agree softly)"
79.0846%