NC Bench
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Run: 2026-02-17-01KHMR62VZXQVYA8TVHNGD1040
Run Details
Model:
Claude Haiku 4.5
Test:
Bad Writing Habits
Scenario:
Fantasy: entering an ancient ruin
Duration:
23.5s
Cost:
$0.011262
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="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
# Passage Through the Oak Gate The standing stones appeared without warning, ancient
sentinels
rising from the undergrowth of Richmond Park like teeth in the earth. Rory stopped dead, her breath misting in the cold December air, and the others drew up beside her—Nyx a careful shadow against the dying winter light, Isolde gliding forward with that unnerving grace that made no sound. "Well," Rory said, her fingers brushing the Heartstone pendant at her throat. It pulsed faintly, a rhythm like a second heartbeat. "This is it?" The oaks were massive, easily three hundred years old, their bark twisted and weathered into patterns that almost looked deliberate. Almost looked like language. They formed a rough circle, but their trunks
seemed to
lean inward, creating a natural gateway that made Rory's blue eyes narrow. The space between them
shimmered
—barely visible, a distortion like heat rising from summer pavement, except wrong. The air had a thickness to it, as if the atmosphere itself
was resisting
. "The Veil is thin here," Isolde said, her voice like wind through those ancient oaks. She didn't turn to face them, her silver hair catching what remained of the daylight. "Step between the stones, and you leave your world behind. Step between, and you enter the in-between places." "Cryptic as always." Rory managed a smile, though her mouth was dry. She'd known what to expect—Isolde had warned her, in her maddeningly roundabout way. But knowing and seeing were different things. The shimmering distortion made her eyes water. Her scar itched, a phantom memory of old pain. Nyx drifted closer to the stones, incorporeal at the moment, their form little more than a suggestion of humanoid shadow. Those faintly glowing violet eyes caught the strange light. "I have not walked this way since before your Christ was born, Carter. The Veil has changed. Or perhaps we have." Their voice, that whisper-thin thing, carried no emotion Rory could identify. "Time moves differently here," Isolde continued, finally turning to face them. Her pale lavender eyes held something infinite. "You must remember: one hour within the Grove may be minutes to those waiting beyond, or days. The Veil answers to its own rules, and it has not answered to mortal clocks for a
very
long time." Rory nodded, absorbing this. She'd worked deli
very
routes through London for six months now; she understood the principle of variable distance, at least in metaphor. But this—this was something else entirely. She pulled the Fae-Forged blade from her jacket, just to feel its familiar
weight
. The moonsilver was cold against her palm, cold as it always was, luminescent even in the fading daylight. "Ready?" she asked, though the question wasn't
really
directed at anyone. Mostly she
was asking
herself. No one answered. In that silence, she took a breath and stepped toward the standing stones. The moment her foot crossed the threshold, the world tilted. It wasn't painful, but it was profoundly disorienting—as if she'd stepped from summer into autumn into spring all at once. Her stomach
lurched
. Colors drained from the park behind her, grays and browns bleeding away like watercolor in rain. The shimmer became solid, a wall of luminescence that wrapped around her, and then— She stumbled forward and gasped. The Fae Grove revealed itself in layers. First came the light—not the thin, brittle light of winter London, but something warm and golden, like perpetual autumn afternoon. The sky above was a cream-white that wasn't quite cloud,
seemed to
hold its own luminescence. Rory's eyes adjusted and she
saw that the
white was actually the canopy of enormous trees, their leaves a thousand shades of green and gold and copper, and they
seemed to
exist in all seasons simultaneously. Wildflowers bloomed e
very
where. E
very
where. She knelt to look at them and found blossoms she had no names for—flowers that
seemed to
shift color as you looked at them, petals that had a subtle luminescence of their own. The grass beneath her fingers was impossibly soft, almost
velvet
. And it was warm. Despite it being winter, the air held the warmth of high summer, though without the
oppressive
heat. Rory breathed in and caught scents that made her
think
of honey and rain and something like electricity. Nyx emerged from the shimmer behind her, solidifying into their true form—that towering silhouette of living shadow, seven feet of darkness that nevertheless moved with precision and grace. Even here, in a place of light and impossible growth, the Shade's presence felt correct somehow. Shadow belonged in all places. Isolde simply walked through as if crossing a threshold in her own home, which, Rory realized, she was. "Don't touch the flowers yet," Isolde said, and there was actual warning in her voice now, not riddling tone. "They are beautiful, yes. But beauty in the Fae realm demands a price, and the prices are rarely coins." She moved deeper into the clearing, her feet making no marks in the soft earth. "Come. There is much to show you before the Veil shifts again." Rory stood, brushing dirt from her jeans—Earth dirt, real dirt, though it felt unreal now. E
very
thing felt unreal. She kept the Fae blade ready, not because she expected combat, but because holding it was like holding a anchor to purpose. She'd come here for a reason. Not just to see this impossible place, but to find something in it. Something Isolde had only hinted at. The clearing opened up as they walked, which shouldn't have been possible from where they'd entered—the space revealed itself like the petals of one of those impossible flowers. A stream wound through the grove, its water so clear that Rory could count the pebbles on its bed, and they glowed faintly with their own luminescence. Beyond that, the forest deepened, and Rory realized the Grove wasn't a simple clearing at all. It was vast. Architecturally impossible from the outside, but here, in this place where time bent to different rules, the distances stretched in ways that made sense and didn't simultaneously. "How long can we stay?" Rory asked. "As long as we need to," Isolde replied. "Or as long as the Veil allows. It weakens and strengthens with the solstices. You came at the winter solstice for good reason—the barrier is permeable now in ways it won't be again for six months. We are between darkness and return. The dead hours. An excellent time for secrets." Nyx moved to the stream, bending—that strange, boneless motion of the Shade—and
seemed to
look at their reflection. Of course, there was no reflection. But they stared at the water anyway, and when they spoke, their voice carried something almost like wonder. "I remember this. I remember walking these paths when I was still flesh. Before the ritual. Before I became... this." "Aldric," Isolde said, not unkindly. "You were Aldric then. But you are Nyx now. And Nyx does not suffer the
weight
that Aldric did." The Shade said nothing, but their form
seemed to
solidify further, becoming more dense, more present. Rory watched and said nothing. Some conversations didn't need her input. She turned in a slow circle, taking it all in. The Heartstone pendant pulsed against her collarbone—no longer faint now, but with a steady, insistent rhythm. It thrummed with warmth. Somewhere in this Grove, somewhere in this impossible place between worlds, answers waited. She could feel it in the pulse of the stone, in the charged air, in the way the wildflowers
seemed to
watch as she passed. "Where are we actually going?" she asked. Isolde smiled,
enigmatic
as always. "Where we have always been going, Aurora Carter. To the heart of the question you've been too afraid to ask. To the reason that pendant chooses to speak with your pulse instead of merely hanging silent around your neck." The Grove deepened around them, more beautiful and stranger with each step, and Rory followed Isolde and Nyx into the verdant impossible, the Fae blade cold and ready in her hand.
created_at
"2026-02-17T02:52:25.790001+00:00"
2/17/2026, 2:52:25 AM
model
"anthropic/claude-4.5-haiku-20251001"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
389
moderation_latency
(null)
generation_time
23371
tokens_prompt
1590
tokens_completion
2056
native_tokens_prompt
1757
native_tokens_completion
1901
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
0.011262
router
(null)
provider_responses
0
id
"msg_01Af98rm5mN3bacbwdkNoirs"
status
200
is_byok
false
latency
389
endpoint_id
"41d2915a-92e6-4993-b537-210b4e10cba8"
provider_name
"Anthropic"
model_permaslug
"anthropic/claude-4.5-haiku-20251001"
api_type
"completions"
id
"gen-1771296721-pXD2zk3JY2XU553MHoLi"
upstream_id
"msg_01Af98rm5mN3bacbwdkNoirs"
total_cost
0.011262
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
Evaluation details
Result
Evaluator
Details
Meta Data
96.2963%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
9
adverbTagCount
1
adverbTags
0
"Isolde continued, finally turning to face them [finally]"
85.1522%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1347
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)
40.6088%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1347
totalAiIsms
8
found
0
word
"enigmatic"
count
1
1
word
"sentinels"
count
1
2
word
"lurched"
count
1
3
word
"shimmered"
count
1
4
word
"oppressive"
count
1
5
word
"velvet"
count
1
6
word
"weight"
count
2
highlights
0
"enigmatic"
1
"sentinels"
2
"lurched"
3
"shimmered"
4
"oppressive"
5
"velvet"
6
"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
81
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
1
hedgeCount
7
narrationSentences
81
filterMatches
0
"think"
hedgeMatches
0
"seemed to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
1
totalSentences
89
matches
0
"saw that the"
100.0000%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
30
mean
44.3
std
26.25
cv
0.593
sampleLengths
0
6
1
57
2
24
3
76
4
48
5
48
6
61
7
55
8
63
9
16
10
16
11
10
12
53
13
5
14
79
15
86
16
49
17
18
18
65
19
65
20
101
21
7
22
58
23
62
24
24
25
27
26
68
27
7
28
44
29
31
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
0
totalSentences
81
matches
(empty)
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
2
totalVerbs
177
matches
0
"was resisting"
1
"was asking"
92.5163%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
1071
adjectiveStacks
0
stackExamples
(empty)
adverbCount
52
adverbRatio
0.04855275443510738
lyAdverbCount
19
lyAdverbRatio
0.017740429505135387
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
89
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
89
mean
14.93
std
9.99
cv
0.669
sampleLengths
0
26
1
37
2
12
3
9
4
3
5
20
6
4
7
22
8
16
9
14
10
15
11
15
12
18
13
12
14
13
15
7
16
7
17
9
18
20
19
9
20
32
21
11
22
7
23
37
24
4
25
21
26
6
27
14
28
18
29
11
30
5
31
3
32
13
33
10
34
20
35
3
36
16
37
14
38
5
39
7
40
20
41
16
42
36
43
3
44
1
45
33
46
10
47
4
48
17
49
18
84.6442%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
3
diversityRatio
0.5280898876404494
totalSentences
89
uniqueOpeners
47
91.6667%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
9
fancyCount
3
fancyTags
0
"Rory said, her fingers brushing the Heartstone pendant at her throat (say, brush)"
1
"Isolde continued, finally turning to face them (continue, finally turn face)"
2
"Isolde said, and there was actual warning in her voice now, not riddling tone (say, be does not riddle)"
93.5814%