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Run: 2026-02-16-01KHKA8SRP478PDYRRRDSZ8Z03
Run Details
Model:
GPT-5.1
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
15.5s
Cost:
$0.011301
Provider:
OpenAI
Model input
User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain hammered the station roof as Detective Mara Quinn arrived. The last train had left, but one passenger remained tonight. He sat upright, eyes open, throat sliced to cartilage cleanly. Fluorescent lights flickered, painting everyone sickly shades of suspicion inside. Mara noted blood spatter patterns, delicate constellations across cracked tiles. The station master hovered nearby, twisting keys like nervous rosary. Outside, thunder drowned sirens, trapping them inside a temporary world. She checked pockets, finding no wallet, just a damp ticket. Its ink had bled, except for two legible words tonight. Mara glanced up, catching the security camera's single dead eye. Someone had planned darkness, then counted on the storm's noise. Footsteps approached cautiously, echoing like apologies along the platform length. Anxious officers arrived late, dripping rainwater, already rehearsing excuses quietly. Mara raised a hand, preserving silence like fragile crime glass. Somewhere beneath metal tracks, a phone vibrated, unheard, still ringing. The dead man's screen glowed, displaying her own unanswered number.
created_at
"2026-02-16T13:29:53.043892+00:00"
2/16/2026, 1:29:53 PM
model
"openai/gpt-5.1-20251113"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
12866
moderation_latency
(null)
generation_time
15312
tokens_prompt
46
tokens_completion
403
native_tokens_prompt
41
native_tokens_completion
1125
native_tokens_completion_images
0
native_tokens_reasoning
880
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
0.01130125
router
(null)
provider_responses
0
id
"resp_0e36e255bacdccda0169931bc0597c81948001b37f7828f48b"
status
200
is_byok
false
latency
157
endpoint_id
"764eb97f-8bab-4326-b29b-7a8799b00a70"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5.1-20251113"
api_type
"completions"
id
"gen-1771248576-zMGHNSsi2315kcMNGODV"
upstream_id
"resp_0e36e255bacdccda0169931bc0597c81948001b37f7828f48b"
total_cost
0.01130125
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
16
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10
10
10
11
10
12
10
13
10
14
10
15
10