Run: 2026-05-29-01KSSKB81156FRD402X7GR18G7

Run Details

Model:
Claude Opus 4.8 (Reasoning)
Test:
Bad Writing Habits
Scenario:
Fantasy: entering an ancient ruin
Duration:
41.1s
Cost:
$0.070150
Provider:
Anthropic

Evaluation summary

Score Evaluator
Details Link
100.00% Adverbs in dialogue tags (details)
95.31% AI-ism adverb frequency (details)
100.00% AI-ism character names (details)
100.00% AI-ism location names (details)
81.24% AI-ism word frequency (details)
100.00% Cliché density (details)
100.00% Emotion telling (show vs. tell) (details)
100.00% Filter word density (details)
100.00% Gibberish response detection (details)
100.00% Markdown formatting overuse (details)
100.00% Missing dialogue indicators (quotation marks) (details)
66.67% Name drop frequency (details)
94.44% Narrator intent-glossing (details)
100.00% "Not X but Y" pattern overuse (details)
100.00% Overuse of "that" (subordinate clause padding) (details)
100.00% Paragraph length variance (details)
100.00% Passive voice overuse (details)
100.00% Past progressive (was/were + -ing) overuse (details)
11.49% Em-dash & semicolon overuse (details)
100.00% Purple prose (modifier overload) (details)
100.00% Repeated phrase echo (details)
100.00% Sentence length variance (details)
83.52% Sentence opener variety (details)
0.00% Adverb-first sentence starts (details)
100.00% Pronoun-first sentence starts (details)
6.30% Subject-first sentence starts (details)
0.00% Subordinate conjunction sentence starts (details)
68.97% Technical jargon density (details)
98.68% Useless dialogue additions (details)
100.00% Dialogue tag variety (said vs. fancy) (details)
83.5541% Overall

Model input

System
You are an expert fiction writer. Always keep the following rules in mind: - Write in past tense and use General English spelling, grammar, and colloquialisms/slang. - Write in active voice - Always follow the "show, don't tell" principle. - Avoid adverbs and cliches and overused/commonly used phrases. Aim for fresh and original descriptions. - Convey events and story through dialogue. - Mix short, punchy sentences with long, descriptive ones. Drop fill words to add variety. - Skip "he/she said said" dialogue tags and convey people's actions or face expressions through their speech - Avoid mushy dialog and descriptions, have dialogue always continue the action, never stall or add unnecessary fluff. Vary the descriptions to not repeat yourself. - Put dialogue on its own paragraph to separate scene and action. - Reduce indicators of uncertainty like "trying" or "maybe" When writing text: - NEVER conclude the scene on your own, follow the beat instructions very closely. - NEVER end with foreshadowing. - NEVER write further than what I prompt you with. - AVOID imagining possible endings, NEVER deviate from the instructions. - STOP EARLY if the continuation contains what was required in the instructions. You do not need to fill out the full amount of words possible.
User/Human
Take into account the following glossary of characters/locations/items/lore... when writing your response: <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> Continue the story using the following instructions: <instructions> 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. </instructions>

Model response

AI
The standing stones rose out of the bracken like teeth, each one a slab of weathered oak gone grey and hard as iron. Rory pressed her palm against the nearest and felt it hum. "That's not normal," she said. "Wood shouldn't feel like that." "Nothing past this line is normal." Nyx flowed alongside her, their shadow-form thinning where the late sun struck it, then pooling thick again in the gaps between trunks. "Cross it slow. The Grove notices guests." Eva hung back at Rory's shoulder, one hand fisted in her jacket. "Notices? It's a clearing in a park. We took the number 65 bus to get here." "And yet." Nyx slid between two stones without disturbing a single fern. Rory followed. The air changed the instant she passed the boundary, thick and sweet, like stepping from a cold room into a greenhouse. Behind her the noise of Richmond Park—dog walkers, distant traffic, the drone of a plane stacking for Heathrow—cut off as cleanly as a closed door. She turned. The stones still stood, but the world beyond them had gone soft and uncertain, the trees smeared like wet paint. "Eva. Come on." Eva stepped through, swore under her breath, and went quiet. The clearing opened in front of them, wider than it had any right to be. Grass too green, threaded with wildflowers that had no business sharing a season—snowdrops nodding beside foxgloves, primrose tangled with autumn crocus, all of it blooming at once. The light came from everywhere and nowhere. No sun overhead, just a low gold radiance that lay along every blade and petal. "It's warm," Eva said. "It was October out there. My breath was fogging." "Time runs its own way in here." Nyx drifted to the centre of the clearing and stopped, head tilting as though listening. "An hour in the Grove might be ten minutes on the bus route. Or three days. Don't count on getting any of it back." Rory knelt and touched a foxglove. The bell of it curled toward her finger, slow, deliberate, the way a cat leaned into a hand. She pulled back. "Did you see that?" "They like you." A new voice, threaded with amusement, came from the far edge where the trees grew thick and silver-barked. "Most things do, until they learn better." Isolde stepped out of the shadow between two birches. She left no mark in the grass—no bent stem, no flattened blade, as if she weighed nothing at all. Her hair caught the gold light and threw it back as cold silver. Pale lavender eyes moved over the three of them and settled on Rory. "You found the stones." "Nyx found them." Rory got to her feet. "I just held on." "Holding on is the whole of it." Isolde's mouth curved. "Come. You'll want to see before the light shifts. It only shows certain things while it's kind." She turned and walked deeper. Rory glanced at Eva, who gave a small helpless shrug, and they went after her. The deeper they moved, the stranger the Grove grew. The wildflowers gave way to a stream that ran uphill, water sliding over pale stones with a sound like soft laughter. Rory crouched beside it. The current pulled the wrong way, climbing the slope toward a low rise crowned with white blossom. "Don't drink it," Isolde said, without looking back. "Not because it would harm you. Because you would never want to leave." "Good to know." Eva edged away from the bank. A sound moved through the trees then—a long, belling note, half birdsong and half struck glass. Rory's skin prickled. The Heartstone pendant at her throat gave a faint throb of warmth, then settled. "What was that?" "The Grove breathing." Isolde paused at the foot of the rise. "You feel it answer you, don't you? The stone at your neck." Rory's hand went to the pendant. "It pulses near portals. There's no portal here." "Isn't there?" Isolde tipped her head toward the blossoming tree at the crest. "Everything thin is a kind of door. This place sits between. One step too far in the wrong direction and you're somewhere the bus does not go." Nyx had gone very still beside the stream, their violet eyes fixed on a patch of empty air. "She's right. The Veil's gauze-thin here. I can see straight through it." They lifted one shadow-hand, and the space in front of it shimmered, a faint distortion like heat off summer tarmac. "There. And there. Tears, all stitched loose." Eva squinted. "I don't see anything." "You wouldn't." Nyx let their hand fall. "Be glad." They climbed the rise. At the top, the blossoming tree spread its branches over a flat grey stone worn smooth as a tabletop, and around the stone the air sang faintly, that same glass-and-birdsong note held low and continuous. Petals drifted down without falling, hanging in the warm light, turning slow circles. Rory stopped under the branches and forgot, for a moment, to be afraid. The petals brushed her cheek, her hair, cool as snow and weightless. Above her the blossom went up and up, far higher than the tree's own height, branches losing themselves in a haze of white and gold. "Oh," she breathed. "Oh, that's—" "Wonderful," Isolde finished. "And the most dangerous thing in the Grove. Wonder makes you forget the way back." She set her hand on the grey stone. "This is where I see. Sit, all of you. Mind the petals don't settle in your hair—they take root if you stay too long, and then you stay forever, which suits no one but the tree." Eva sat down hard, brushing frantically at her shoulders. "Nope. Off. Get off." Rory lowered herself to the stone's edge, slower, watching the petals drift past her knees. The Fae blade rode cold against her hip, a small hard certainty in a place that felt made of dreams. She pressed her wrist to it, felt the chill bite through, and used it to keep herself anchored. "All right," she said. "We're here. We're sitting. Tell us what we came to hear." Isolde's pale eyes caught the gold light and held it. The singing in the branches dropped lower, expectant. "You came to hear about the door," she said. "But first—listen to what the Grove has already told you, and didn't think to ask."
created_at"2026-05-29T10:09:14.795Z" 5/29/2026, 10:09:14 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4150
moderation_latency(null)
generation_time41098
tokens_prompt1816
tokens_completion1644
native_tokens_prompt2695
native_tokens_completion2267
native_tokens_completion_images(null)
native_tokens_reasoning77
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"end_turn"
service_tier"default"
usage0.07015
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_012BJJYhMUrkgo56yyiC7kFA"
is_byokfalse
latency1599
model_permaslug"anthropic/claude-4.8-opus-20260528"
provider_name"Anthropic"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.16.0; linux; x64))"
http_referer(null)
request_id"req-1780049354-Nfp7nPfhlOK8D9xXrQOy"
session_id(null)
api_type"completions"
id"gen-1780049354-nsKSHEepDrZb3H2wJJXr"
upstream_id"msg_012BJJYhMUrkgo56yyiC7kFA"
total_cost0.07015
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags19
adverbTagCount2
adverbTags
0"Nyx flowed alongside [alongside]"
1"Eva edged away [away]"
dialogueSentences43
tagDensity0.442
leniency0.884
rawRatio0.105
effectiveRatio0.093
95.31% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1066
totalAiIsmAdverbs1
found
0
adverb"very"
count1
highlights
0"very"
100.00% AI-ism character names
Target: 0 AI-default names (17 tracked, −20% each)
codexExemptions(empty)
found(empty)
100.00% AI-ism location names
Target: 0 AI-default location names (33 tracked, −20% each)
codexExemptions(empty)
found(empty)
81.24% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1066
totalAiIsms4
found
0
word"throb"
count1
1
word"warmth"
count1
2
word"shimmered"
count1
3
word"chill"
count1
highlights
0"throb"
1"warmth"
2"shimmered"
3"chill"
100.00% Cliché density
Target: ≤1 cliche(s) per 800-word window
totalCliches0
maxInWindow0
found(empty)
highlights(empty)
100.00% Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells1
narrationSentences63
matches
0"felt the chill"
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount0
narrationSentences63
filterMatches(empty)
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences87
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen37
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1059
ratio0
matches(empty)
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions8
unquotedAttributions0
matches(empty)
66.67% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions37
wordCount731
uniqueNames10
maxNameDensity1.64
worstName"Rory"
maxWindowNameDensity3
worstWindowName"Rory"
discoveredNames
Nyx5
Eva7
Rory12
Richmond1
Park1
Heathrow1
Isolde7
Grove1
Heartstone1
Fae1
persons
0"Nyx"
1"Eva"
2"Rory"
3"Heathrow"
4"Isolde"
5"Grove"
places
0"Richmond"
1"Park"
globalScore0.679
windowScore0.667
94.44% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences45
glossingSentenceCount1
matches
0"as though listening"
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches1
per1kWords0.944
wordCount1059
matches
0"no one but"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences87
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs39
mean27.15
std19.52
cv0.719
sampleLengths
034
110
235
328
412
570
63
710
864
913
1046
1127
124
1328
1454
154
1612
1727
1820
1951
2021
219
2233
233
2423
2514
2640
2757
286
299
3052
3150
325
3362
3413
3553
3615
3718
3824
100.00% Passive voice overuse
Target: ≤2% passive sentences
passiveCount0
totalSentences63
matches(empty)
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount0
totalVerbs125
matches(empty)
11.49% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount5
semicolonCount0
flaggedSentences4
totalSentences87
ratio0.046
matches
0"Behind her the noise of Richmond Park—dog walkers, distant traffic, the drone of a plane stacking for Heathrow—cut off as cleanly as a closed door."
1"Grass too green, threaded with wildflowers that had no business sharing a season—snowdrops nodding beside foxgloves, primrose tangled with autumn crocus, all of it blooming at once."
2"She left no mark in the grass—no bent stem, no flattened blade, as if she weighed nothing at all."
3"A sound moved through the trees then—a long, belling note, half birdsong and half struck glass."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount741
adjectiveStacks0
stackExamples(empty)
adverbCount25
adverbRatio0.033738191632928474
lyAdverbCount3
lyAdverbRatio0.004048582995951417
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences87
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences87
mean12.17
std8.12
cv0.667
sampleLengths
023
111
25
35
428
57
612
716
812
92
1021
1125
122
1320
143
1510
1615
1727
187
1915
204
219
2222
2324
246
2518
263
274
2821
297
309
3119
3213
3313
344
358
364
3710
3817
395
4015
419
4221
434
4417
458
4613
479
4816
493
83.52% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats4
diversityRatio0.5287356321839081
totalSentences87
uniqueOpeners46
0.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount0
totalSentences54
matches(empty)
ratio0
100.00% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount8
totalSentences54
matches
0"She pulled back."
1"She left no mark in"
2"Her hair caught the gold"
3"She turned and walked deeper."
4"They lifted one shadow-hand, and"
5"They climbed the rise."
6"She set her hand on"
7"She pressed her wrist to"
ratio0.148
6.30% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount49
totalSentences54
matches
0"The standing stones rose out"
1"Rory pressed her palm against"
2"Nyx flowed alongside her, their"
3"Eva hung back at Rory's"
4"Nyx slid between two stones"
5"The air changed the instant"
6"The stones still stood, but"
7"Eva stepped through, swore under"
8"The clearing opened in front"
9"Grass too green, threaded with"
10"The light came from everywhere"
11"Nyx drifted to the centre"
12"Rory knelt and touched a"
13"The bell of it curled"
14"She pulled back."
15"A new voice, threaded with"
16"Isolde stepped out of the"
17"She left no mark in"
18"Her hair caught the gold"
19"Rory got to her feet"
ratio0.907
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences54
matches(empty)
ratio0
68.97% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences29
technicalSentenceCount3
matches
0"Grass too green, threaded with wildflowers that had no business sharing a season—snowdrops nodding beside foxgloves, primrose tangled with autumn crocus, all of…"
1"The wildflowers gave way to a stream that ran uphill, water sliding over pale stones with a sound like soft laughter."
2"The Fae blade rode cold against her hip, a small hard certainty in a place that felt made of dreams."
98.68% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags19
uselessAdditionCount1
matches
0"Isolde said, without looking back"
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags6
fancyCount1
fancyTags
0"she breathed (breathe)"
dialogueSentences43
tagDensity0.14
leniency0.279
rawRatio0.167
effectiveRatio0.047
83.5541%