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Run: 2026-02-16-01KHKB0XEH5677JS2JY66EX079
Run Details
Model:
GPT-5.1
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
37.8s
Cost:
$0.024791
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 sleepy town. Neon flickered over deserted harborfront. Detective Mara Quinn watched silently. The sirens wailed behind her. Blue lights stained puddled asphalt. She tugged up her collar. November wind sliced through wool. Crime tape fluttered like bunting. Harbor patrol boats bobbed restlessly. Onlookers clustered by the railings. Voices hushed as Mara approached. Officer Delgado lifted the tape. "Evening, Detective. Nasty one tonight." Mara stepped past, boots crunching. Broken glass glittered among gravel. The body lay beside moorings. Male, mid-thirties, expensively dressed tonight. Rain collected in his eyes. Blood trailed toward the water. A silver watch ticked faintly. Mara crouched, studying each detail. Wallet untouched, phone missing entirely. Delgado shifted, breathing behind her. "Harbormaster says nobody heard anything." Mara noted the silent warehouses. Dark windows watched like jurors. Somewhere, rope creaked against pilings. She smelled oil, salt, diesel. "You ran him through dispatch?" "Name's Lucas Vane, investment consultant." Delgado checked notes, brow furrowing. "Lives uptown, near the promenade." Mara's gaze drifted toward darkness. A yacht engine coughed nearby. Rain blurred footprints across planks. Only one set approached Lucas. None turned away from him. "No struggle, no witness, nothing." Delgado swallowed, eyes on water. "You think this was random?" Mara studied the flawless suit. Fingers brushed a damp cufflink. Its emblem matched the harbormaster's. Outside, the tide kept rising.
created_at
"2026-02-16T13:43:25.395242+00:00"
2/16/2026, 1:43:25 PM
model
"openai/gpt-5.1-20251113"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
24908
moderation_latency
(null)
generation_time
37588
tokens_prompt
46
tokens_completion
990
native_tokens_prompt
41
native_tokens_completion
2474
native_tokens_completion_images
0
native_tokens_reasoning
2080
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
0.02479125
router
(null)
provider_responses
0
id
"resp_0f9f4be211057fbf0169931ed68c1c8196b761ebcc41912c6b"
status
200
is_byok
false
latency
154
endpoint_id
"764eb97f-8bab-4326-b29b-7a8799b00a70"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5.1-20251113"
api_type
"completions"
id
"gen-1771249366-1q5Go3GHKEmNkTUdBQP7"
upstream_id
"resp_0f9f4be211057fbf0169931ed68c1c8196b761ebcc41912c6b"
total_cost
0.02479125
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
99.4973%
Matches word count
n/a
neededClean
false
sentences
44
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
6
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
37
5
38
5
39
5
40
5
41
5
42
5
43
5