Run: 2026-02-18-01KHQ93AQAZ3RA00AQGJJ112RE

Run Details

Duration:
38.2s
Cost:
$0.023982
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> <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> </codex> Write a fully fleshed out scene of at least 1000 words in the horror genre. A character is alone in a strange, isolated place at night. They came here for a reason, but something feels off from the moment they arrive. The wrongness builds slowly — sounds that shouldn't be there, things that move at the edge of vision, a growing certainty that they are not alone. Build tension through restraint, not through gore. Use the codex entries above as your world reference for the character and setting. Only include the prose of the scene without any markdown or commentary.

Model response

AI
The standing stones were wrong. Rory had been to the grove a dozen times now, enough to know the particular way the ancient oaks arranged themselves at the boundary — the slight lean of the westernmost trunk, the moss that clung to the north-facing stone in a shape that, if you were tired or imaginative, resembled a sleeping face. She knew the way the air changed at the threshold, that subtle pressure shift like stepping into a room where someone had just stopped talking. She knew all of it. She'd catalogued it the way she catalogued everything that made her uneasy: methodically, thoroughly, until understanding blunted the edge of fear. But standing at the tree line with Richmond Park dark and empty behind her, she knew the grove was wrong tonight. She couldn't have said precisely how. The oaks stood where they always stood. The clearing beyond them was full of wildflowers, pale and luminous in the October dark — moonflowers and something white she'd never learned the name of, blooming obliviously as they always did regardless of season. The air had done its familiar pressure-shift thing when she crossed the boundary. Everything was exactly as it should be. Everything was exactly as it should be, and her hindbrain was screaming. She pressed two fingers against her sternum, feeling for the Heartstone through the thin fabric of her jacket. It was there. Warm — warmer than it should have been from body heat alone, but not the pulse-and-flare she'd come to associate with something genuinely wrong. Not a portal. Just warmth. She let out a slow breath and stepped fully into the grove. The wildflowers rustled around her ankles. There was no wind. Rory went still. She waited. The flowers settled. Somewhere far outside the grove, a fox called — that sharp, almost human shriek that still made her flinch no matter how many times she heard it. The sound died, and the silence that followed was very large. She'd come because Isolde had sent word. Or something that wore Isolde's handwriting had sent word — a note slipped under the flat door, the familiar looping script asking her to come to the grove tonight, that there was something Rory needed to see. Something about the pendant's origin. Something Isolde claimed she'd finally found. Rory had almost not come. She started across the clearing, keeping her footfalls soft out of old habit, the habit of a person who had learned that quiet was usually safer. The heart of the grove was marked by a flat stone — a natural thing, she'd been assured, nothing placed — and she made for it now, using it as an anchor point in the dark. She was halfway across when she heard the sound. It was low. Lower than low, really — less a sound she heard than a sound she felt, a subsonic tremor that moved up through the soles of her boots and settled somewhere behind her back teeth. It lasted perhaps three seconds and then stopped. Rory stopped with it. She turned a slow circle, scanning the tree line. The grove's canopy was dense enough to block most of the ambient glow from the distant city, and what light reached her came from a partial moon and the flowers themselves — that faint, sourceless luminescence that she'd stopped trying to explain. Shadows pooled between the oaks. Deep shadows. The kind that could hold anything. Nothing moved. She turned back toward the flat stone and kept walking. The second sound was different. Higher. It might have been wind — would have been wind, if there had been any wind — a long, thin note that rose and then bent, like something trying to approximate a melody it had only heard once and only partially remembered. It came from her left, from the direction of the oldest oak, the one with the hollow in its base. Rory did not look at the hollow. This was a decision she made consciously, deliberately, in the span of about half a second: if there was something in the hollow, looking at it would accomplish nothing except confirming that there was something in the hollow. She already knew there was something in the hollow. The Heartstone had shifted from warm to hot against her sternum, and that was confirmation enough. She reached the flat stone and turned so her back was to it. The hollow was at her ten o'clock. She kept her eyes at twelve, at the far edge of the tree line, and she watched. For a while, nothing. The flower-light. The motionless trees. A silence so complete it had texture. Then, at the very periphery of her vision, something moved. It was not a large movement. It was not dramatic. A shadow separated slightly from the shadow of the hollow's edge — an inch, maybe two — and then was still again. As if something had leaned forward to look at her and then thought better of it. Her mouth had gone very dry. "Isolde," she said. Her voice came out level. She was unreasonably proud of this. Nothing answered. "I know you left that note," she said. "I'd like to talk about what you found." The shadow at the hollow shifted again. Still subtle. Still that unbearable almost-movement, the thing that was somehow worse than a charge or a lunge would have been — the patience of it. The suggestion of something that had time. That had all the time it could ever need. The Heartstone pulsed once, sharply, and she felt it like a small fist against her ribs. No portal, she thought. So what, then? She became aware, with the particular cold clarity that came to her when fear burned itself down to something usable, that she could not see the boundary stones anymore. She could see the oaks, or shapes that were oak-shaped, but the familiar lean of the westernmost trunk was gone. The moss face on the northern stone was gone. The boundary she'd crossed to enter the grove was simply — absent. Replaced by undifferentiated dark. The grove was larger than it had been. Or she was somewhere in it that she hadn't been before. She pressed her thumbnail into the crescent scar on her left wrist, an old grounding habit, feeling the familiar ridge of it. Real. She was real. She was here. The something in the hollow breathed out — long and slow, a sound like silk pulled across stone — and Rory made herself stand very still and think.
created_at"2026-02-18T02:26:44.949484+00:00" 2/18/2026, 2:26:44 AM
model"anthropic/claude-4.6-sonnet-20260217"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency637
moderation_latency(null)
generation_time38099
tokens_prompt812
tokens_completion1622
native_tokens_prompt839
native_tokens_completion1431
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"stop"
usage0.023982
router(null)
provider_responses
0
id"msg_015SBVH11yVdjPdC1y3atRUf"
status200
is_byokfalse
latency636
endpoint_id"6d408764-7dd7-4626-bb87-a6cc1589bc86"
provider_name"Anthropic"
model_permaslug"anthropic/claude-4.6-sonnet-20260217"
api_type"completions"
id"gen-1771381566-n7YVWexQ90oxg7RzPUVU"
upstream_id"msg_015SBVH11yVdjPdC1y3atRUf"
total_cost0.023982
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"

Evaluation details

Result Evaluator Details Meta Data
100.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags2
adverbTagCount0
adverbTags(empty)
dialogueSentences3
tagDensity0.667
leniency1
rawRatio0
effectiveRatio0
58.49% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount1084
totalAiIsmAdverbs9
found
0
adverb"precisely"
count1
1
adverb"very"
count4
2
adverb"really"
count1
3
adverb"deliberately"
count1
4
adverb"slightly"
count1
5
adverb"sharply"
count1
highlights
0"precisely"
1"very"
2"really"
3"deliberately"
4"slightly"
5"sharply"
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)
49.26% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount1084
totalAiIsms11
found
0
word"familiar"
count4
1
word"pulse"
count1
2
word"warmth"
count1
3
word"silence"
count2
4
word"scanning"
count1
5
word"pulsed"
count1
6
word"silk"
count1
highlights
0"familiar"
1"pulse"
2"warmth"
3"silence"
4"scanning"
5"pulsed"
6"silk"
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
emotionTells0
narrationSentences90
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount0
hedgeCount0
narrationSentences90
filterMatches(empty)
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences91
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
maxSentenceWordsSeen54
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords1094
ratio0
matches(empty)
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions7
unquotedAttributions0
matches(empty)
100.00% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions16
wordCount1079
uniqueNames6
maxNameDensity0.65
worstName"Rory"
maxWindowNameDensity1.5
worstWindowName"Isolde"
discoveredNames
Richmond1
Park1
October1
Heartstone3
Isolde3
Rory7
persons
0"Heartstone"
1"Isolde"
2"Rory"
places
0"Richmond"
1"Park"
2"October"
globalScore1
windowScore1
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences57
glossingSentenceCount0
matches(empty)
100.00% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches0
per1kWords0
wordCount1094
matches(empty)
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount1
totalSentences91
matches
0"learned that quiet"
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs40
mean27.35
std24.64
cv0.901
sampleLengths
05
179
226
382
47
512
650
712
810
93
1043
1155
125
1362
149
1545
164
1764
182
1910
2068
217
2263
2313
2424
2516
2610
2748
286
2914
302
3116
3249
3316
347
3574
368
3711
3829
3928
93.57% Passive voice overuse
Target: ≤2% passive sentences
passiveCount3
totalSentences90
matches
0"was marked"
1"been assured"
2"was gone"
3"was gone"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount1
totalVerbs179
matches
0"was screaming"
0.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount17
semicolonCount0
flaggedSentences13
totalSentences91
ratio0.143
matches
0"Rory had been to the grove a dozen times now, enough to know the particular way the ancient oaks arranged themselves at the boundary — the slight lean of the westernmost trunk, the moss that clung to the north-facing stone in a shape that, if you were tired or imaginative, resembled a sleeping face."
1"The clearing beyond them was full of wildflowers, pale and luminous in the October dark — moonflowers and something white she'd never learned the name of, blooming obliviously as they always did regardless of season."
2"Warm — warmer than it should have been from body heat alone, but not the pulse-and-flare she'd come to associate with something genuinely wrong."
3"Somewhere far outside the grove, a fox called — that sharp, almost human shriek that still made her flinch no matter how many times she heard it."
4"Or something that wore Isolde's handwriting had sent word — a note slipped under the flat door, the familiar looping script asking her to come to the grove tonight, that there was something Rory needed to see."
5"The heart of the grove was marked by a flat stone — a natural thing, she'd been assured, nothing placed — and she made for it now, using it as an anchor point in the dark."
6"Lower than low, really — less a sound she heard than a sound she felt, a subsonic tremor that moved up through the soles of her boots and settled somewhere behind her back teeth."
7"The grove's canopy was dense enough to block most of the ambient glow from the distant city, and what light reached her came from a partial moon and the flowers themselves — that faint, sourceless luminescence that she'd stopped trying to explain."
8"It might have been wind — would have been wind, if there had been any wind — a long, thin note that rose and then bent, like something trying to approximate a melody it had only heard once and only partially remembered."
9"A shadow separated slightly from the shadow of the hollow's edge — an inch, maybe two — and then was still again."
10"Still that unbearable almost-movement, the thing that was somehow worse than a charge or a lunge would have been — the patience of it."
11"The boundary she'd crossed to enter the grove was simply — absent."
12"The something in the hollow breathed out — long and slow, a sound like silk pulled across stone — and Rory made herself stand very still and think."
88.34% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1069
adjectiveStacks0
stackExamples(empty)
adverbCount57
adverbRatio0.05332086061739944
lyAdverbCount20
lyAdverbRatio0.018709073900841908
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences91
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences91
mean12.02
std11.26
cv0.936
sampleLengths
05
154
225
35
421
521
66
77
835
913
107
1112
1218
133
1424
153
162
1712
186
194
203
212
223
2327
2411
257
2637
275
286
295
3026
3136
329
333
3434
358
364
379
3842
395
402
416
422
4310
445
451
4642
4720
487
4938
43.22% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats14
diversityRatio0.3516483516483517
totalSentences91
uniqueOpeners32
84.39% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount2
totalSentences79
matches
0"Somewhere far outside the grove,"
1"Then, at the very periphery"
ratio0.025
73.16% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount29
totalSentences79
matches
0"She knew the way the"
1"She knew all of it."
2"She'd catalogued it the way"
3"She couldn't have said precisely"
4"She pressed two fingers against"
5"It was there."
6"She let out a slow"
7"She'd come because Isolde had"
8"She started across the clearing,"
9"She was halfway across when"
10"It was low."
11"It lasted perhaps three seconds"
12"She turned a slow circle,"
13"She turned back toward the"
14"It might have been wind"
15"It came from her left,"
16"She already knew there was"
17"She reached the flat stone"
18"She kept her eyes at"
19"It was not a large"
ratio0.367
54.94% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount64
totalSentences79
matches
0"The standing stones were wrong."
1"Rory had been to the"
2"She knew the way the"
3"She knew all of it."
4"She'd catalogued it the way"
5"She couldn't have said precisely"
6"The oaks stood where they"
7"The clearing beyond them was"
8"The air had done its"
9"Everything was exactly as it"
10"Everything was exactly as it"
11"She pressed two fingers against"
12"It was there."
13"She let out a slow"
14"The wildflowers rustled around her"
15"Rory went still."
16"The flowers settled."
17"The sound died, and the"
18"She'd come because Isolde had"
19"Something about the pendant's origin."
ratio0.81
63.29% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount1
totalSentences79
matches
0"As if something had leaned"
ratio0.013
40.82% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences35
technicalSentenceCount5
matches
0"Rory had been to the grove a dozen times now, enough to know the particular way the ancient oaks arranged themselves at the boundary — the slight lean of the we…"
1"She'd catalogued it the way she catalogued everything that made her uneasy: methodically, thoroughly, until understanding blunted the edge of fear."
2"She started across the clearing, keeping her footfalls soft out of old habit, the habit of a person who had learned that quiet was usually safer."
3"Still that unbearable almost-movement, the thing that was somehow worse than a charge or a lunge would have been — the patience of it."
4"She became aware, with the particular cold clarity that came to her when fear burned itself down to something usable, that she could not see the boundary stones…"
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags2
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags2
fancyCount0
fancyTags(empty)
dialogueSentences3
tagDensity0.667
leniency1
rawRatio0
effectiveRatio0
84.9827%