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Run: 2026-02-17-01KHMMJ1JFAP66E28DXWEZ4RXE
Run Details
Model:
Claude 3.7 Sonnet
Test:
Bad Writing Habits
Scenario:
Thriller: chase through city streets
Duration:
50.1s
Cost:
$0.039231
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="4416" name="Detective Harlow Quinn" aliases="Quinn, Detective Quinn, Harlow" pronouns="she/her" species="Human" storyRole="Antagonist"> <eyeColor>brown</eyeColor> <hair>closely cropped salt-and-pepper</hair> <height>5'9"</height> <age>41</age> <jawline>sharp jaw</jawline> <watch>worn leather watch on her left wrist</watch> <bearing>military precision</bearing> <description>A Metropolitan Police detective with 18 years of decorated service who suspects the clique is involved in criminal activity.</description> <backstory>She lost her partner, DS Morris, during a case three years ago under unexplained circumstances that had supernatural origins she doesn't yet understand.</backstory> </character> <character id="4417" name="Tomás Herrera" aliases="Tommy, Tomás, Herrera" pronouns="he/him" species="Human" storyRole="Support"> <eyeColor>warm brown</eyeColor> <hair>short curly dark brown</hair> <height>5'10"</height> <age>29</age> <skinTone>olive skin</skinTone> <scar>scar running along his left forearm from a knife attack</scar> <medallion>Saint Christopher medallion around his neck</medallion> <birthplace>Seville, Spain</birthplace> <description>A former paramedic who provides off-the-books medical care for the clique.</description> <backstory>Born in Seville, Spain. He moved to London to work for the NHS but lost his license after administering unauthorized treatments to supernatural patients.</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> <location id="856" name="The Veil Market" aliases="Veil Market, the Market, underground market" realm="Earth"> <currentLocation>abandoned Tube station beneath Camden</currentLocation> <entryRequirement>bone token</entryRequirement> <schedule>moves locations every full moon</schedule> <description>A hidden supernatural black market that sells enchanted goods, banned alchemical substances, and information.</description> </location> </codex> Write a fully fleshed out scene of at least 1000 words in the thriller genre. A detective is pursuing a suspect through rain-soaked city streets at night. The chase takes them from the street level down into an underground market. The detective must decide whether to follow the suspect into unfamiliar and potentially dangerous territory. 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
Rain lashed the Soho streets, turning neon reflections into abstract paintings on the pavement. Detective Harlow Quinn kept her breathing steady as she pursued the shadow slipping between late-night revelers. Three years of chasing whispers had finally materialized into something
tangible
—a suspect with actual connections to what
happened to
Morris. Quinn's leather shoes splashed through puddles as she maintained visual contact with her target. He was good—switching directions at crowded intersections, doubling back through alleyways—but Quinn was better. Eighteen years with the Met had taught her patience. The worn leather
watch
on her left wrist thumped against her pulse point with each stride, a reminder of time's constant march since Morris disappeared. The figure ahead darted
suddenly
leftward, disappearing down a narrow passage between buildings. Quinn accelerated, her jacket growing heavier with rain. The alley opened to a small courtyard where The Raven's Nest stood apart from the surrounding establishments, its green neon sign cutting through the downpour like a
beacon
. Her target yanked open the door and disappeared inside. Quinn slowed her approach, scanning the area with practiced precision. The Nest was known territory—a bar frequented by people who didn't want to be found, owned by a man who knew more than he should about the city's underbelly. She'd questioned Silas twice about Morris before hitting dead ends. Quinn entered, water dripping from her close-cropped salt-and-pepper hair. The bar's interior was dim, the walls adorned with yellowing maps and photographs that
seemed to
watch
patrons with judging eyes. Conversations quieted momentarily as regulars recognized her, then resumed at a lower volume. Her gaze swept the room—no sign of her target. Behind the bar, Silas pointedly ignored her, polishing the same glass for too long. Quinn approached, her shoes squeaking
slightly
on the worn floorboards. "Detective Quinn," Silas finally acknowledged with a tight smile. "Dreadful night to be out." "Where did he go?" Quinn asked, not bothering with pleasantries. Her sharp jawline tensed as she leaned across the bar. Silas shrugged. "Lots of 'hes' come through here. You'll need to be more specific." "Dark jacket, hood up, moved like he knows people are
watch
ing. Came in not thirty seconds ago." "Haven't seen anyone
like that," Silas
replied, eyes flicking briefly toward the far wall lined with bookshelves. Quinn caught the glance and nodded. "I'm sure you haven't." She pushed away from the bar and
navigated
between tables, approaching the bookshelves with measured steps. Her hand instinctively hovered near her concealed weapon as she examined the shelves. A decade ago, she might have missed it—the slight gap between the wall and one shelf, the worn path on the floorboards. Quinn gripped the edge of the shelf and pulled. It swung open with unexpected ease, revealing a narrow corridor beyond. She hesitated only briefly before stepping through, letting the bookshelf close behind her. The passage led downward via steep stone steps that spiraled into darkness. Quinn withdrew her phone, using its light to illuminate her descent. The air grew colder, carrying an unfamiliar metallic scent mixed with something earthier—like soil after rain. At the bottom of the stairs, she found herself facing a junction of old service tunnels. Faint lights glowed in the distance down one passage. Quinn followed them, moving
cautiously
now, aware that she had crossed some invisible boundary into territory the Met didn't officially acknowledge. The tunnel gradually widened, revealing ancient brick walls slick with moisture. Distant voices
echoed
ahead, growing louder as she approached. Quinn dimmed her phone light when she spotted the warm glow of actual lanterns. She emerged into a vast chamber that had once been part of London's abandoned Underground system. But what stretched before her now bore no resemblance to any Tube station she'd ever seen. Stalls and booths filled the space, creating narrow pathways through what
appeared to
be a bustling marketplace despite the late hour. The Veil Market. Quinn had heard whispers about it during her investigation into Morris's disappearance—an underground black market that supposedly traded in items that shouldn't exist. She'd dismissed it as criminal mythology. Yet here it stood, impossible to deny. Vendors hawked wares beneath strings of mismatched lights. Glass containers glowed with substances that moved of their own accord. A woman with too-sharp teeth measured powder on brass scales. A man with elaborate facial markings exchanged coins for what looked like dried herbs, but which writhed
slightly
in their paper packaging. Quinn's instincts screamed danger, but she forced herself forward, scanning the crowd for her target. The market-goers parted
slightly
as she moved through them, many averting their eyes. Her military bearing and the authority she carried in her posture marked her as an outsider as clearly as if she'd flashed her badge. "You don't belong here, Detective." Quinn spun around to find herself face to face with Tomás Herrera. She recognized him from surveillance photos—a person of interest in several cases involving unexplained medical miracles among London's homeless population. "Mr. Herrera," she acknowledged, noting the Saint Christopher medallion that caught the light against his olive skin. "I'm following a suspect." "Into the Market?" His warm brown eyes held concern rather than hostility. "That's not wise without protection or invitation." "I don't need protection," Quinn replied, though her hand instinctively moved closer to her weapon. "I need answers about what
happened to
my partner." Tomás glanced around, seemingly nervous. "DS Morris, yes? That was three years ago." Quinn's
eyes narrowed
. "You know about Morris?" "Everyone who frequents the Market
knows that story
." He absently traced the long scar running along his left forearm. "But chasing shadows here will only add your disappearance to the legends." A commotion erupted several stalls away. Quinn caught a glimpse of her target pushing through the crowd toward a far tunnel. "I have to go," she said, already moving to follow. Tomás caught her arm. "Wait. You can't just—" He sighed when she yanked free. "At least take this." He pressed something into her palm—a small token carved from what
appeared to
be bone. "It marks you as having business here. Without it, some vendors might take... offense." Quinn hesitated, then pocketed the token. "Why help me?" "Because I've seen what happens to unprepared visitors," he answered, his expression grim. "And contrary to what your files probably say about me, I don't like seeing people get hurt." Quinn nodded once before pursuing her target deeper into the market. The crowd thickened as she approached what
appeared to
be the market's center. Here, the goods became stranger—bottles containing what looked like miniature storms, jewelry that changed color as she passed, books bound in materials she couldn't identify. She spotted her target again, negotiating with a hooded vendor whose face remained in shadow despite the surrounding lights. The vendor handed over a small wooden box. As her target turned to leave, Quinn caught a clear view of his face for the first time. She froze. It couldn't be. The man had Morris's eyes, Morris's jawline—but something was wrong. The skin around his temples bore
intricate
patterns that
seemed to
shift when she
tried to
focus on them. And he moved with a fluidity that Morris, with his rugby player's bulk, had never possessed. The Morris-like figure noticed her staring and smiled—a cold, knowing expression. Then he turned and sprinted toward another exit tunnel. "Stop! Police!" Quinn called out, pushing through startled market-goers. The market erupted into chaos. Stalls toppled as people scrambled to protect their wares or flee. Lights
flickered
ominously overhead. Quinn kept her eyes fixed on her target as she pursued him into a narrow tunnel branching off from the main chamber. This passage was darker, illuminated only by phosphorescent fungi growing along the ceiling. The tunnel sloped upward, twisting through what must have been ancient sections of London's buried past. Quinn's breaths came quicker now, the air growing thin and stale. She emerged into a smaller chamber where multiple tunnels converged. Her target stood in the center, the wooden box open in his hands. Inside lay something that glowed with a blue-white light. "Morris?" she called out, her voice
echoing
. The figure looked up, and Quinn's certainty
wavered
. There was something off about the eyes now—too bright, too fixed. "Not quite, Detective Quinn." The voice was Morris's, but layered with something else, something that made the air vibrate strangely. "But close enough to lead you here." "What
happened to
him?" Quinn demanded, advancing
slowly
. "What
happened to
my partner?" "He saw too much. Asked too many questions." The figure closed the box, plunging the chamber into relative darkness. "As you're doing now." Quinn drew her weapon. "I'm taking you in for questioning." The figure laughed—a sound that
seemed to
come from everywhere at once. "Your authorities have no jurisdiction here, Detective. The Veil Market exists between your world and others. The rules you enforce stop at that bookshelf door." "I don't care about jurisdictions," Quinn replied, her grip steady despite the growing unease in her stomach. "I care about what
happened to
Morris." "Then you should turn around and leave with that question unanswered," the figure advised, backing toward one of the other tunnels. "Some knowledge destroys those who possess it." Quinn advanced another step. "I'm not leaving without answers." "Then you're not leaving at all." The figure smiled again—Morris's smile, but wrong somehow. He raised the box. "Last chance, Detective. Return to your rain-soaked streets and logical explanations. Or follow me and face what Morris faced." Quinn stood at the precipice of a choice she'd been working toward for three years. Everything about this place defied rational explanation. The market, this impostor wearing her partner's face, the strange undercurrent of power she could feel humming beneath her feet—none of it belonged in the London she patrolled. She thought of Tomás's warning, of the bone token in her pocket. She thought of Morris's empty desk that still remained untouched at the precinct. She thought of the reports she'd filed that disappeared, the witnesses who recanted, the evidence that vanished. Quinn raised her chin, decision made. She stepped forward into darkness, her worn leather
watch
ticking steadily against her wrist, counting down to whatever truth awaited.
created_at
"2026-02-17T01:49:29.666142+00:00"
2/17/2026, 1:49:29 AM
model
"anthropic/claude-3-7-sonnet-20250219"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
422
moderation_latency
(null)
generation_time
50011
tokens_prompt
914
tokens_completion
2817
native_tokens_prompt
917
native_tokens_completion
2432
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
0.039231
router
(null)
provider_responses
0
id
"msg_01Rdq1GN1Qrr8ohVSFpX1G8M"
status
200
is_byok
false
latency
422
endpoint_id
"1347c8dc-12f5-47df-8355-3ec7e80a8c67"
provider_name
"Anthropic"
model_permaslug
"anthropic/claude-3-7-sonnet-20250219"
api_type
"completions"
id
"gen-1771292919-26GSeJwiQOCWFDoOFmvJ"
upstream_id
"msg_01Rdq1GN1Qrr8ohVSFpX1G8M"
total_cost
0.039231
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
Evaluation details
Result
Evaluator
Details
Meta Data
14.2857%
Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags
14
adverbTagCount
5
adverbTags
0
"Silas finally acknowledged with a tight smile [finally]"
1
"Silas replied, eyes flicking briefly toward the far wall lined with bookshelves [briefly]"
2
"she acknowledged, noting the Saint Christopher medallion that caught the light against his olive skin [light]"
3
"Quinn replied, though her hand instinctively moved closer to her weapon [instinctively]"
4
"she said, already moving to follow [already]"
65.0757%
AI-ism adverb frequency
Target: <1% AI-ism adverbs (57 tracked)
wordCount
1718
totalAiIsmAdverbs
6
found
0
adverb
"cautiously"
count
1
1
adverb
"slightly"
count
3
2
adverb
"slowly"
count
1
3
adverb
"suddenly"
count
1
highlights
0
"cautiously"
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)
53.4342%
AI-ism word frequency
Target: <1% AI-ism words (140 tracked)
wordCount
1718
totalAiIsms
8
found
0
word
"tangible"
count
1
1
word
"beacon"
count
1
2
word
"flickered"
count
1
3
word
"wavered"
count
1
4
word
"intricate"
count
1
5
word
"echoed"
count
1
6
word
"echoing"
count
1
7
word
"navigated"
count
1
highlights
0
"tangible"
1
"beacon"
2
"flickered"
3
"wavered"
4
"intricate"
5
"echoed"
6
"echoing"
7
"navigated"
100.0000%
Cliche density
Target: ≤1 cliche(s) per 800-word window
totalCliches
1
maxInWindow
1
found
0
label
"eyes widened/narrowed"
count
1
highlights
0
"eyes narrowed"
100.0000%
Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells
0
narrationSentences
116
matches
(empty)
100.0000%
Filter word density
Target: ≤12% sentences with filter/hedge words
filterCount
2
hedgeCount
8
narrationSentences
116
filterMatches
0
"watch"
hedgeMatches
0
"happened to"
1
"seemed to"
2
"appeared to"
3
"tried to"
100.0000%
Overuse of "that" (subordinate clause padding)
Target: ≤10% sentences with "that" clauses
thatCount
2
totalSentences
139
matches
0
"like that,\" Silas"
1
"knows that story"
100.0000%
Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs
57
mean
29.7
std
15.87
cv
0.534
sampleLengths
0
50
1
62
2
49
3
58
4
43
5
33
6
14
7
20
8
14
9
17
10
17
11
10
12
51
13
33
14
39
15
46
16
34
17
53
18
32
19
58
20
52
21
5
22
32
23
21
24
19
25
24
26
13
27
7
28
31
29
21
30
10
31
47
32
9
33
30
34
49
35
45
36
5
37
45
38
20
39
9
40
42
41
40
42
32
43
7
44
19
45
27
46
13
47
23
48
10
49
37
100.0000%
Passive voice overuse
Target: ≤5% passive sentences
passiveCount
0
totalSentences
116
matches
(empty)
100.0000%
Past progressive (was/were + -ing) overuse
Target: ≤10% past progressive verbs
pastProgressiveCount
0
totalVerbs
275
matches
(empty)
100.0000%
Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount
1422
adjectiveStacks
0
stackExamples
(empty)
adverbCount
54
adverbRatio
0.0379746835443038
lyAdverbCount
26
lyAdverbRatio
0.01828410689170183
100.0000%
Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences
139
echoCount
0
echoWords
(empty)
100.0000%
Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences
139
mean
12.18
std
6.1
cv
0.501
sampleLengths
0
14
1
16
2
20
3
14
4
14
5
9
6
25
7
13
8
8
9
28
10
9
11
10
12
29
13
10
14
9
15
21
16
13
17
9
18
14
19
10
20
9
21
5
22
10
23
10
24
2
25
12
26
17
27
17
28
6
29
4
30
16
31
13
32
22
33
9
34
11
35
13
36
12
37
11
38
16
39
16
40
9
41
21
42
11
43
9
44
14
45
16
46
16
47
21
48
3
49
23
58.9928%
Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats
8
diversityRatio
0.38848920863309355
totalSentences
139
uniqueOpeners
54
14.2857%
Dialogue tag variety (said vs. fancy)
Target: ≤30% fancy dialogue tags
totalTags
14
fancyCount
9
fancyTags
0
"Silas finally acknowledged with a tight smile (finally acknowledge)"
1
"Silas replied, eyes flicking briefly toward the far wall lined with bookshelves (reply, flick briefly line)"
2
"she acknowledged, noting the Saint Christopher medallion that caught the light against his olive skin (acknowledge, note catch)"
3
"Quinn replied, though her hand instinctively moved closer to her weapon (reply, instinctively move)"
4
"she said, already moving to follow (say, already move follow)"
5
"sighed (sigh)"
6
"pressed (pressed)"
7
"demanded (demand)"
8
"the figure advised, backing toward one of the other tunnels (advise, back)"
82.7102%