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Run: 2026-02-16-01KHKAF7BVEWWKQEGHY8A7WKR8
Run Details
Model:
GPT-5.1
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
36.5s
Cost:
$0.032921
Provider:
OpenAI
Model input
User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 5 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain hammered the rusted trainyard. Floodlights smeared halos across puddles. Detective Mara Kline pulled in. Sirens whimpered, finally fading behind. Uniforms clustered near warehouse nine. Yellow tape fluttered like flags. The air reeked of brine. Harbor fog draped everything inwards. Mara tasted diesel on breath. Her shoes soaked through instantly. Lieutenant Briggs stomped toward her. He looked older in sodium. Eyes red, jaw wired tight. He muttered, 'You picked nights.' Mara shrugged rain off collar. She said, 'What have we?' Briggs pointed at the doorway. Guard found him during rounds. Wouldn't answer, started screaming instead. So yeah, fun evening patrol. They ducked beneath sagging tape. Concrete steps led into black. Inside, generators hummed like insects. Water dripped somewhere, steady metronome. The warehouse tasted of pennies. Mara followed the copper smell. It thickened near loading bay. Techs crouched, photographing every shadow. A body lay between crates. Skin waxy, suit darkly soaking. One hand reached toward rafters. Eyes stared beyond corrugated ceiling. Throat opened into a grin. Blood crawled along warped grooves. Mara's pen clicked by reflex. She knelt, ignoring damp knees. Briggs hovered, cracking knuckles softly. He said, 'Name's Victor Harlow.' Dock manager, night shift supervisor. Everyone around here owes him. Mara inspected the ruined throat. Cuts clean, almost loving work. No hesitation marks, no struggle. She glanced at his shoes. Polished leather, barely dotted crimson. He never saw this coming. Briggs asked, 'Robbery gone wrong?' Wallet's here, watch still ticking. Chain of gold, untouched, gleaming. Mara scanned the distant corners. A camera blinked above office. Red light dead, lens crusted. She sniffed, catching faint perfume. Wrong note in this place. Metal, salt, oil, then jasmine. Briggs squinted toward the catwalks. Footprints up there, barely visible. Fresh, rain hasn't washed them. Mara rose, joints complaining quietly. Get them dusted, she ordered. And find me the guard. Nobody screams like that innocently. Outside, rain swallowed distant sirens. The harbor kept its silence. Inside, the questions started multiplying.
created_at
"2026-02-16T13:33:44.579008+00:00"
2/16/2026, 1:33:44 PM
model
"openai/gpt-5.1-20251113"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4087
moderation_latency
(null)
generation_time
35940
tokens_prompt
46
tokens_completion
1448
native_tokens_prompt
41
native_tokens_completion
3287
native_tokens_completion_images
0
native_tokens_reasoning
2725
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
"completed"
usage
0.03292125
router
(null)
provider_responses
0
id
"resp_0910e3c3253ca86f0169931c92e4e88190a6893e4092c3a4e8"
status
200
is_byok
false
latency
152
endpoint_id
"764eb97f-8bab-4326-b29b-7a8799b00a70"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5.1-20251113"
api_type
"completions"
id
"gen-1771248786-a2ki0lZqlU6rvFKLER8F"
upstream_id
"resp_0910e3c3253ca86f0169931c92e4e88190a6893e4092c3a4e8"
total_cost
0.03292125
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
100.0000%
Matches word count
n/a
neededClean
false
sentences
65
wordCounts
0
5
1
5
2
5
3
5
4
5
5
5
6
5
7
5
8
5
9
5
10
5
11
5
12
5
13
5
14
5
15
5
16
5
17
5
18
5
19
5
20
5
21
5
22
5
23
5
24
5
25
5
26
5
27
5
28
5
29
5
30
5
31
5
32
5
33
5
34
5
35
5
36
5
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5
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5
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5
40
5
41
5
42
5
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5
44
5
45
5
46
5
47
5
48
5
49
5
50
5
51
5
52
5
53
5
54
5
55
5
56
5
57
5
58
5
59
5
60
5
61
5
62
5
63
5
64
5