Run: 2026-02-17-01KHMMSPS5FY91ED5E0D9SW485

Run Details

Duration:
54.3s
Cost:
$0.043434
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 last bus to central London had left hours ago, and Rory's phone had died ten minutes after she'd stepped into Richmond Park. Just her luck. Still, she pressed on, guided by nothing but moonlight and determination. The pendant nestled against her collarbone, its weight a small comfort. She'd never been one for late-night excursions to parks, but the note slipped under her door that morning had been specific: "Midnight. The old oak stones in Richmond Park. Bring the Heartstone. I have answers about your mother." It was signed with a single letter: J. Her mother's initial. Jennifer. Five years since her mother's disappearance, and this was the first real lead. Of course she'd come. Rory checked her watch. 11:47. The moon hung full and bright, casting long shadows across the expansive park. The night air carried an unseasonal chill for June, and she pulled her jacket tighter. Something about the moonlight made the landscape seem almost too sharp, too defined, like a photograph with the contrast turned up. "Standing stones," she muttered to herself, scanning the tree line ahead. "Oak standing stones. How hard can it be to find massive chunks of—" She stopped short as the tree line broke, revealing a clearing encircled by what looked like ancient, gnarled oak trunks twisted into standing-stone formations. They weren't on any park map she'd studied. Yet there they stood, seven of them, arranged in a loose circle around a small meadow carpeted with wildflowers that shouldn't be blooming this time of year. Rory approached slowly, that familiar itch of curiosity mixing with caution. Her father had always said her curiosity would be the death of her. But then, her father said a lot of things. As she passed between two of the oak formations, a subtle shift rippled through the air. The distant sounds of London—far-off sirens, the hum of traffic—vanished. In their place came the sound of rushing water from somewhere she couldn't see and a whispering rustle that seemed to circle the clearing. The pendant grew warm against her skin. "Hello?" Rory called out, her voice sounding oddly flat, as though the air itself swallowed the sound. "I got your note. I'm here." No response came but the continued whisper of...something. Not wind through leaves. Something else. Something with pattern and purpose. Rory reached the center of the clearing and checked her watch again. 11:52. She had time. She'd wait. The person would come. But as she stood there, something began to feel off. The wildflowers, vibrant despite the darkness, seemed to shift position when she wasn't looking directly at them. The whispers grew more distinct, still unintelligible but clearly not natural sounds. And the pendant—the Heartstone—pulsed with increasing warmth against her skin. Rory circled slowly, scanning the boundaries of the clearing. "This isn't funny," she called out, injecting more confidence into her voice than she felt. "If you know something about my mother, just come out and tell me." Movement caught her eye—a shadow slipping between two of the oak stones. Too fluid for a person. Too large for a fox or a deer. "Who's there?" Rory stepped back, instinctively moving toward the center of the clearing again. The Heartstone grew hot enough that she had to pull it away from her skin, holding it out by its silver chain. In the moonlight, the deep crimson gem pulsed with its own inner light, like a tiny, beating heart. A soft chuckle sounded from behind her. Rory spun around. Nothing. Another laugh, this time to her left. She pivoted again. "Stop it," she said firmly, falling back on the voice she'd used in mock trial competitions. Authoritative. Controlled. "Show yourself." The whispers intensified, and now she could almost make out words. Her name, perhaps. Other words she didn't recognize. The language sounded ancient, musical, and wrong in a way she couldn't articulate. Rory glanced at her watch. 11:58. But that couldn't be right. She'd arrived at 11:47, and it felt like she'd been standing here for at least twenty minutes. She tapped the watch face. It had to be wrong. The wildflowers began to sway, though there was no wind. Toward her. All of them, bending gently in her direction, as though curious. "This was a mistake," Rory muttered, turning to leave the way she'd come. But the oak stones looked different now—closer together, taller, more menacing in their twisted forms. She couldn't identify which pair she'd walked through. The pendant jerked in her hand, pulling toward a specific gap between two stones. Rory hesitated, then decided to trust it. She'd received the Heartstone three days after her mother vanished, delivered in a small wooden box with no note, no explanation. Just like today's message, it had been slipped under her door while she was out. She moved toward the gap the pendant seemed to be indicating, but as she approached, the ground trembled beneath her feet. The wildflowers shot up suddenly, growing taller, their stems thickening, blooms expanding to the size of dinner plates. They blocked her path in a riot of impossible colors. "No," Rory said firmly, as though addressing a misbehaving pet. "I'm leaving now." She changed direction, heading for a different gap, but the same thing happened—wildflowers erupting from the ground, growing with audible creaks and pops to form a barrier. The whispers had become a chorus now, rising and falling with unsettling harmony. And with terrible certainty, Rory knew she was not alone in this clearing. Something watched her. Many things, perhaps, studying her from just beyond the ring of oak stones. The Heartstone burned against her palm now, its crimson glow casting her hand in bloody light. She checked her watch again. 12:01. Midnight had come and gone. "I don't know what this is," she said to the empty air, to the watching presence she could feel but not see, "but I'm done playing games. Either show yourself or I'm finding my way out of here." A soft laugh answered her—the same one as before, but closer now. A woman's laugh, warm and familiar in a way that sent ice through Rory's veins. "Mom?" she whispered. The whispers stopped abruptly. The wildflowers froze their swaying. Even the pulsing of the Heartstone paused. For one long, breathless moment, everything was still. Then a figure stepped through the gap directly in front of Rory—the same one she'd initially entered through, she realized with a start. The figure was slender, feminine, backlit by moonlight so that Rory couldn't make out the face. "Aurora," the figure said, in a voice that was her mother's but somehow not—deeper, more resonant, with an echo that no human voice should have. "You came." "Mom?" Rory stepped forward, relief warring with confusion. "What is this place? Where have you been? Why—" "So many questions," the figure said with that same familiar laugh. "You always were curious. Too curious for your own good." The figure stepped fully into the clearing, and moonlight illuminated her face. It was Jennifer Carter—her delicate features, her kind eyes, her gentle smile. But there was something wrong with the proportions. Her eyes were slightly too large. Her smile extended a fraction too far. And her skin had a faint, luminescent quality, as though lit from within. Rory's relief curdled into dread. "You're not my mother." "I am and I am not," the figure said, tilting her head at an angle that looked painful. "I am what she became. What she chose to become. What you will become as well, now that you've brought the Heartstone back to the Grove." The wildflowers began to creep forward, their stems elongating across the ground like seeking tendrils. Rory stepped back. "I don't understand. What happened to my mom? What is this place?" "The Fae Grove has always been here, child. Hidden between worlds." The not-quite-Jennifer gestured expansively. "Your mother discovered it by accident. You came by invitation." Her smile widened further, revealing teeth that seemed too numerous, too sharp. "It's time you joined us. The court has been watching you for years." The Heartstone jerked violently in Rory's hand, pulling toward the figure. She clutched it tighter. "No," Rory said firmly. "Whatever this is, whatever happened to my mother—I'm not staying. And I'm not giving you this." She closed her fist around the pendant. The figure's expression hardened, the pretense of humanity dropping away further. "The Heartstone belongs to the Grove. As do you, daughter of Jennifer. The invitation was a courtesy. The choice is not yours to make." The wildflowers surged forward suddenly, wrapping around Rory's ankles. She tried to step back, but they held fast, their touch cold as ice through her jeans. The whispering voices returned, louder now, more insistent. "Let me go," Rory demanded, yanking at her legs. The small crescent scar on her left wrist caught the moonlight as she struggled. The not-Jennifer noticed it and hissed, actually hissed, drawing back. "Iron," she spat. "You've been marked by iron." Rory glanced at her scar—the result of falling against an iron fence when she was seven. Her mother had been distraught, far more than the minor injury had warranted. Understanding clicked into place. Fairy tales. Iron and fae. The pendant's warmth. With sudden clarity, Rory pressed the silver chain of the Heartstone against the wildflowers holding her legs. They recoiled with a sound like steam escaping a kettle. She broke free, stumbling backward. "Clever girl," the creature wearing her mother's face said, more curious than angry. "But silver won't help you leave the Grove. Once entered willingly, the way back must be earned." Rory's mind raced. The Heartstone. It had guided her to an entrance. Perhaps... She held the pendant out before her and turned in a slow circle. When she faced northeast, the crimson gem's pulsing intensified, its inner glow brightening. "There's always a way out," Rory said, backing toward the gap the pendant indicated. "And I'm going to find my real mother. The human one." The not-Jennifer's face twisted with something like regret. "Your mother made her choice, Aurora. Five years in the Fae realm—there is precious little humanity left in her now. There will be less in you, should you return." Rory reached the gap between the oak stones, the Heartstone pulling urgently now. "Watch me," she said. As she stepped through, the not-Jennifer called out one last time, in a voice that was almost entirely her mother's: "I'll be waiting, my darling. We have all the time in the world." The world lurched around Rory, reality bending like light through water. She stumbled forward, momentum carrying her through— —and fell onto damp grass in Richmond Park. Regular, mundane Richmond Park, with the distant sounds of London returning. Dawn light crept over the horizon. Her phone, when she checked it, showed 6:17 AM and a full battery. The Heartstone pendant hung quietly against her chest, cool once more, its inner glow dormant. But as Rory climbed shakily to her feet, she could have sworn it pulsed once—like a promise, or a warning.
created_at"2026-02-17T01:53:45.515028+00:00" 2/17/2026, 1:53:45 AM
model"anthropic/claude-3-7-sonnet-20250219"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency421
moderation_latency(null)
generation_time54239
tokens_prompt812
tokens_completion2902
native_tokens_prompt838
native_tokens_completion2728
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"
usage0.043434
router(null)
provider_responses
0
id"msg_01KWWv9WURuaPddZbJsw4g7N"
status200
is_byokfalse
latency421
endpoint_id"1347c8dc-12f5-47df-8355-3ec7e80a8c67"
provider_name"Anthropic"
model_permaslug"anthropic/claude-3-7-sonnet-20250219"
api_type"completions"
id"gen-1771293170-VGhObojaLem0077cPOQ2"
upstream_id"msg_01KWWv9WURuaPddZbJsw4g7N"
total_cost0.043434
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"

Evaluation details

Result Evaluator Details Meta Data
35.2941% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags17
adverbTagCount5
adverbTags
0"she said firmly, falling back on the voice she'd used in mock trial competitions [firmly]"
1"Rory said firmly, as though addressing a misbehaving pet [firmly]"
2"the figure said, in a voice that was her mother's but somehow not—deeper, more resonant, with an echo that no human voice should have [somehow more]"
3"Rory said firmly [firmly]"
4"the creature wearing her mother's face said, more curious than angry [more]"
67.7766% AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount1862
totalAiIsmAdverbs6
found
0
adverb"gently"
count1
1
adverb"slightly"
count1
2
adverb"slowly"
count2
3
adverb"suddenly"
count2
highlights
0"gently"
1"slightly"
2"slowly"
3"suddenly"
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)
78.5177% AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount1862
totalAiIsms4
found
0
word"lurched"
count1
1
word"trembled"
count1
2
word"weight"
count1
3
word"echo"
count1
highlights
0"lurched"
1"trembled"
2"weight"
3"echo"
100.0000% Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches0
maxInWindow0
found(empty)
highlights(empty)
100.0000% Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells0
narrationSentences154
matches(empty)
100.0000% Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount4
hedgeCount8
narrationSentences154
filterMatches
0"watch"
hedgeMatches
0"seemed to"
1"began to"
2"tried to"
100.0000% Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount0
totalSentences171
matches(empty)
91.4694% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs63
mean29.21
std13.73
cv0.47
sampleLengths
048
150
217
354
424
559
633
750
87
923
1019
1122
1249
1337
1425
1514
1640
1711
1810
1920
2032
2138
2223
2336
2457
2549
2613
2727
2842
2927
3038
3127
323
3324
3439
3527
3617
3721
3858
399
4044
4118
4212
4350
4415
4527
4635
4734
4823
4918
100.0000% Passive voice overuse
Target: ≤5% passive sentences
passiveCount2
totalSentences154
matches
0"was signed"
1"been slipped"
100.0000% Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount1
totalVerbs271
matches
0"wasn't looking"
86.4206% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1531
adjectiveStacks0
stackExamples(empty)
adverbCount85
adverbRatio0.05551926845199216
lyAdverbCount24
lyAdverbRatio0.015676028739386023
100.0000% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences171
echoCount0
echoWords(empty)
100.0000% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences171
mean10.76
std7.5
cv0.697
sampleLengths
023
13
211
311
446
53
61
713
84
94
101
1113
1215
1321
1411
1513
1624
178
1827
1911
2013
219
2216
2310
2424
257
2617
276
288
294
302
315
3212
331
343
352
364
3710
3817
3912
4010
419
4215
4313
4412
455
468
4714
4822
4918
54.0918% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats13
diversityRatio0.3712574850299401
totalSentences167
uniqueOpeners62
0.0000% Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags17
fancyCount14
fancyTags
0"she muttered to herself, scanning the tree line ahead (mutter scan)"
1"she called out, injecting more confidence into her voice than she felt (call out, inject feel)"
2"she said firmly, falling back on the voice she'd used in mock trial competitions (say firmly, fall back use)"
3"Rory muttered, turning to leave the way she'd come (mutter, turn leave come)"
4"Rory said firmly, as though addressing a misbehaving pet (say firmly, address)"
5"she said to the empty air, to the watching presence she could feel but not see (say feel does not see)"
6"whispered (whisper)"
7"the figure said, in a voice that was her mother's but somehow not—deeper, more resonant, with an echo that no human voice should have (say, be be have)"
8"the figure said, tilting her head at an angle that looked painful (say, tilt look)"
9"Rory said firmly (say firmly)"
10"Rory demanded, yanking at her legs (demand, yank)"
11"she spat (spit)"
12"the creature wearing her mother's face said, more curious than angry (wear say)"
13"Rory said, backing toward the gap the pendant indicated (say, back indicate)"
83.1512%