NC Bench
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Run: 2026-02-17-01KHMQG99Y6QP48M196373AQ7M
Run Details
Model:
Claude Opus 4.5
Test:
Bad Writing Habits
Scenario:
Literary fiction: old friends reunite
Duration:
58.9s
Cost:
$0.069445
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="4413" name="Silas Blackwood" aliases="Silas, Si, the Spymaster" pronouns="he/him" species="Human" storyRole="Mentor"> <eyeColor>hazel</eyeColor> <hair>grey-streaked auburn</hair> <height>6'1"</height> <age>58</age> <beard>neatly trimmed, matching his grey-streaked auburn hair</beard> <limp>slight limp in his left leg from an old knee injury</limp> <signetRing>silver signet ring, always worn on his right hand</signetRing> <description>Silas is a retired intelligence operative turned bar owner. He carries himself with quiet authority.</description> <backstory>Former MI6 field agent who retired after a botched operation in Prague left him with a permanent knee injury. He opened "The Raven's Nest" bar in Soho as a front for his network of contacts.</backstory> </character> <location id="854" name="The Raven's Nest" aliases="the Nest, Raven, Silas' bar" realm="Earth"> <signColor>distinctive green neon sign above the entrance</signColor> <secretRoom>hidden back room accessible through a bookshelf, used for clandestine meetings</secretRoom> <description>A dimly lit bar in Soho, London. The walls are covered with old maps and black-and-white photographs.</description> </location> </codex> Write a fully fleshed out scene of at least 1000 words in the literary fiction genre. Two old friends who haven't seen each other in years run into each other unexpectedly at a bar. One of them has changed significantly. Through their conversation and the tension between who they were and who they've become, reveal the weight of time and unspoken regret. 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 green neon sign buzzed overhead as Aurora pushed through the door of The Raven's Nest, shaking rain from her jacket. The familiar smell hit her first—oak and whiskey and something faintly like old paper, the accumulated scent of decades of secrets traded in low voices. She'd lived above this place for eight months now, but she still wasn't used to the way it could
feel
like stepping backward through time. The dinner rush at Golden Empress had run late, and her feet ached from hours of
navigating
London's rain-slicked streets on her delivery bike. All she wanted was a quiet corner, maybe one of Silas's better whiskeys if he
was feeling
generous, and the particular kind of solitude that only a crowded room could provide. She was halfway to her usual spot at the end of the bar when she saw him. He sat alone at a table beneath one of Silas's old maps—this one of Prague, she'd noticed before, with a small red pin stuck somewhere near the river. His hair was shorter than she remembered, cropped close to his skull in a way that made his face
look
older, more angular. He'd grown a beard, neatly trimmed, threaded with early grey despite the fact that he couldn't be more than thirty. But it was his posture that stopped her—the careful way he held himself, shoulders curved inward as if bracing against a wind that wasn't there.
Marcus
Chen
had always been the most confident person she'd ever known. She stood frozen in the middle of the bar, caught between the door and the life she'd built in its absence. Around her, conversations continued their gentle murmur, glasses clinked, someone laughed at something that wasn't particularly funny. The world kept moving while she
tried to
remember how to breathe. He
look
ed up. For a moment, neither of them moved. Aurora watched recognition dawn across his features, watched it transform into something more complicated—surprise, certainly, but underneath it a
flicker
of what might have been fear. Or hope. She'd never been good at reading
Marcus
, not
really
. That had been part of the problem. "Rory." He said her name like it was a word he'd forgotten the meaning of and was only now remembering. "Christ. Rory Carter." She made herself walk toward him, each step a small act of courage. "
Marcus
. I didn't expect—" She stopped, because what could she possibly say? I didn't expect you to be here. I didn't expect you to be alive. I didn't expect to
feel
anything at all. "Sit down," he said, and then, as if remembering himself: "Please. If you want." She sat. Up close, the changes were more pronounced. There were lines around his eyes that hadn't been there before, and a scar she didn't recognize running along his jaw, disappearing into the edge of his beard. His hands, wrapped around a glass of something amber, were rougher than she remembered. Working hands, now. She thought of the smooth, ink-stained fingers that had once turned pages of law texts beside her in the Cardiff library, and something in her chest turned over. "What are you doing here?" she asked. The question felt inadequate, but it was the only one she had. "I could ask you the same thing." He attempted a smile, but it didn't quite reach his eyes. "Last I heard, you were still in Cardiff. Something about finishing your law degree." "Last you heard was three years ago." The words landed harder than she'd intended.
Marcus
flinched, and she watched him absorb the blow with that new stillness of his. The
Marcus
she'd known would have deflected, would have turned her accusation into a joke, would have slid past the discomfort with the easy charm that had always been his first defense. This
Marcus
just nodded. "I know," he said quietly. "I'm sorry." Aurora reached up and rubbed absently at the crescent-shaped scar on her left wrist, a childhood habit she'd never broken. "You disappeared. Right after graduation. Vanished like you'd never existed.
Sarah
said you'd gone abroad, but she didn't know where. James thought maybe—" She stopped herself. "It doesn't matter what James thought." "James always did think the worst of me." "Can you blame him?"
Marcus
look
ed down at his drink. In the dim light of the bar, surrounded by Silas's collection of old photographs and memories, he
look
ed like just another ghost. "No," he said. "I can't." Behind the bar, she could see Silas polishing glasses with his usual
methodical
attention, his silver signet ring catching the light. He
was watching
them—of course he was, Silas watched everything—but when Aurora caught his eye, he simply inclined his head and turned away. Whatever this was, he
was leaving
it to her. "You
look
different,"
Marcus
said. "So do you." "I mean—" He made a vague gesture that encompassed her entirely. "You
look
like you're actually here. Present. You used to always seem like you were somewhere else, thinking about the next thing, the better thing. Now you
look
like you've stopped running." The accuracy of it stung. Aurora thought about her flat upstairs, small and cluttered with secondhand books and the accumulated debris of a life she was still learning to live. She thought about the delivery bag in the back room, about the routes through London she'd memorized, about the way Yu-Fei always packed extra dumplings for her at the end of a long shift. It wasn't the life she'd planned. It wasn't the life anyone had planned for her. But it was hers. "I stopped running," she said. "About eight months ago. I live upstairs, actually. Work at a restaurant down the street." Something
flickered
across his face—surprise, maybe, or judgment, or the ghost of both. "You left law school?" "I left a lot of things." She met his eyes steadily, daring him to say what she knew he
was thinking
. Aurora Carter, who was supposed to be a barrister by now, who was supposed to be making her father proud, who was supposed to be everything she'd been raised to be. Aurora Carter, delivering fried rice on a bicycle and sleeping in a flat the size of her mother's walk-in closet. But
Marcus
just nodded
slowly
, as if he understood. And maybe,
look
ing at him now—at the calluses on his hands and the grey in his beard and the way he held himself like someone who'd learned to take up less space—maybe he did. "I was in the military," he said. "After I left. Just for a year and a half—they medically discharged me after—" He touched the scar on his jaw, an unconscious gesture. "Anyway. After that, I tried a few things. Construction. Fishing boats up in Scotland for a while. Now I drive lorries. Long-haul stuff, mostly. It's quiet." Aurora
tried to
reconcile this with the
Marcus
she'd known—ambitious, driven, destined for the diplomatic corps or maybe Parliament. The
Marcus
who'd stayed up all night arguing about international law, who'd had opinions about everything and the vocabulary to defend them. The
Marcus
who'd once told her, with the absolute certainty of youth, that he was going to change the world. "What happened?" she asked, and then immediately wished she hadn't. It was too big a question for a chance encounter in a Soho bar. It was the kind of question that required years to answer.
Marcus
was quiet for a long moment. Around them, the bar continued its gentle hum—the clink of glasses, the murmur of voices, the creak of old floorboards under uncertain feet. Aurora watched Silas's slight limp as he moved behind the counter, and she wondered how many other people in this room
were carrying
wounds that didn't show. "I woke up one day,"
Marcus
finally said, "and I realized I couldn't remember who I was supposed to be anymore. Everything I'd worked for, everything I'd planned—it was like
look
ing at a photograph of someone else's life. And I thought, if I don't leave now, I never will. So I left." "Without telling anyone." "I didn't know how to explain it. I didn't have the words." He wrapped his hands more
tightly
around his glass, and Aurora noticed they
were trembling
slightly
. "I think I was afraid that if I
tried to
explain, someone would talk me out of it. And I wasn't strong enough to stay." Aurora thought about Evan. About the flat in Cardiff she'd shared with him, about the way he'd
slowly
dismantled her confidence piece by piece until she couldn't remember what it felt like to trust her own judgment. About the night Eva had called from London—just checking in, she'd said, but there had been something in her voice, a lifeline thrown across the distance—and Aurora had packed a bag and left while Evan was at work. No note. No explanation. Just gone. "I understand," she said, and meant it.
Marcus
look
ed up at her, and for the first time since she'd sat down, she saw something of the person she'd known in his eyes. Not the ambition or the charm, but something underneath—a vulnerability he'd always kept
carefully
hidden, protected by layers of wit and confidence and careful deflection. "I'm sorry I didn't say goodbye," he said. "I'm sorry I wasn't there when you needed—" "You didn't know I needed anything." "I should have. We were friends, Rory. We were—" He stopped, and she watched him struggle with words he'd never learned to say. "I should have known." The
weight
of everything
unspoken
hung between them. Three years of silence. The people they'd been, and the people they'd become, and the vast distance between the two. Aurora thought about all the things she might have said to him, once—about Evan, about her father's disappointment, about the nights she'd spent wondering if she'd made the right choice. She thought about the comfort she might have found in his voice, if only he'd been there to offer it. But he hadn't been. And she'd survived anyway. "I forgive you," she said, and
was surprised
to find she meant it.
Marcus
blinked. "Just like that?" "Just
like that." She
reached across the table and touched his hand briefly—rough with calluses, warm despite the cold rain outside. "We were kids,
Marcus
. We didn't know how to be people yet. We still don't, not
really
. But we're trying." He
let out a breath
that sounded like it had
been held
for years. "Yeah," he said. "We're trying." Silas appeared at their table with two glasses of his better whiskey, setting them down without comment before disappearing back behind the bar. Aurora caught his eye and nodded her thanks. He'd always had a gift for knowing when people needed fortification. "To trying,"
Marcus
said, raising his glass. Aurora clinked hers against it. The whiskey was smooth, warming a path down her chest, and she let herself
feel
the simple pleasure of being alive, being here, being present in this moment with someone who'd known her before she'd learned to know herself. Outside, the rain continued to fall. Inside The Raven's Nest, time moved strangely, the way it always did in places
weight
ed with history and secrets and the accumulated debris of human lives. And two people who'd once been friends, and then been strangers, began the slow, uncertain work of becoming something new.
created_at
"2026-02-17T02:41:07.120704+00:00"
2/17/2026, 2:41:07 AM
model
"anthropic/claude-4.5-opus-20251124"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1363
moderation_latency
(null)
generation_time
58832
tokens_prompt
867
tokens_completion
2849
native_tokens_prompt
914
native_tokens_completion
2595
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
0.069445
router
(null)
provider_responses
0
id
"msg_01STjBgtxi3i6tQsKwtEeRKR"
status
200
is_byok
false
latency
1363
endpoint_id
"be883404-eb42-4b2d-b6e4-c7daa3aa8d62"
provider_name
"Anthropic"
model_permaslug
"anthropic/claude-4.5-opus-20251124"
api_type
"completions"
id
"gen-1771296007-ZrxjlZOgwglSRqyrt1CC"
upstream_id
"msg_01STjBgtxi3i6tQsKwtEeRKR"
total_cost
0.069445
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
Evaluation details
Result
Evaluator
Details
Meta Data
66.6667%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
15
adverbTagCount
3
adverbTags
0
"he said, and then, as if remembering himself [then]"
1
"he said quietly [quietly]"
2
"Marcus finally said [finally]"
63.5036%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1918
totalAiIsmAdverbs
7
found
0
adverb
"carefully"
count
1
1
adverb
"slightly"
count
1
2
adverb
"slowly"
count
2
3
adverb
"tightly"
count
1
4
adverb
"really"
count
2
highlights
0
"carefully"
1
"slightly"
2
"slowly"
3
"tightly"
4
"really"
40.0000%
AI-ism character names
Target: 0 AI-default names (16 tracked, −20% each)
codexExemptions
0
"Blackwood"
found
0
"Chen"
1
"Marcus"
2
"Sarah"
100.0000%
AI-ism location names
Target: 0 AI-default location names (33 tracked, −20% each)
codexExemptions
(empty)
found
(empty)
68.7174%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1918
totalAiIsms
6
found
0
word
"flickered"
count
1
1
word
"flicker"
count
1
2
word
"methodical"
count
1
3
word
"unspoken"
count
1
4
word
"weight"
count
1
5
word
"navigating"
count
1
highlights
0
"flickered"
1
"flicker"
2
"methodical"
3
"unspoken"
4
"weight"
5
"navigating"
100.0000%
Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches
1
maxInWindow
1
found
0
label
"let out a breath"
count
1
highlights
0
"let out a breath"
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
1
narrationSentences
109
matches
0
"was surprised"
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
2
hedgeCount
2
narrationSentences
109
filterMatches
0
"look"
1
"feel"
hedgeMatches
0
"tried to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
1
totalSentences
130
matches
0
"like that.\" She"
100.0000%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
54
mean
35.07
std
25.71
cv
0.733
sampleLengths
0
71
1
55
2
17
3
96
4
12
5
50
6
3
7
51
8
23
9
47
10
14
11
2
12
80
13
19
14
32
15
7
16
58
17
7
18
52
19
8
20
4
21
33
22
53
23
5
24
3
25
43
26
83
27
20
28
17
29
72
30
43
31
57
32
61
33
35
34
57
35
52
36
3
37
53
38
81
39
7
40
50
41
16
42
6
43
27
44
78
45
8
46
13
47
5
48
41
49
19
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
3
totalSentences
109
matches
0
"was supposed was supposed was supposed been raised"
1
"was surprised"
2
"been held"
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
6
totalVerbs
281
matches
0
"was feeling"
1
"was watching"
2
"was leaving"
3
"was thinking"
4
"were carrying"
5
"were trembling"
88.8416%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
1547
adjectiveStacks
1
stackExamples
0
"smooth, ink-stained fingers"
adverbCount
71
adverbRatio
0.04589528118939883
lyAdverbCount
25
lyAdverbRatio
0.01616031027795734
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
130
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
130
mean
14.57
std
10.31
cv
0.707
sampleLengths
0
21
1
25
2
25
3
24
4
31
5
17
6
28
7
23
8
20
9
25
10
12
11
21
12
17
13
12
14
3
15
7
16
26
17
2
18
9
19
7
20
20
21
3
22
13
23
12
24
7
25
7
26
8
27
14
28
2
29
7
30
28
31
14
32
3
33
28
34
7
35
12
36
18
37
14
38
7
39
7
40
15
41
32
42
4
43
5
44
2
45
20
46
26
47
6
48
8
49
4
47.4359%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
15
diversityRatio
0.35384615384615387
totalSentences
130
uniqueOpeners
46
75.0000%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
15
fancyCount
6
fancyTags
0
"he said, and then, as if remembering himself (say, remember)"
1
"he said quietly (say quietly)"
2
"Marcus finally said (finally say)"
3
"she said, and meant it (say, mean)"
4
"she said, and was surprised to find she meant it (say, surprise find mean)"
5
"Marcus said, raising his glass (say, raise)"
85.3038%