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Run: 2026-02-16-01KHKAGZE3VTYZHW26CAWQD3MC
Run Details
Model:
GPT-5
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
43.2s
Cost:
$0.025191
Provider:
OpenAI
Model input
User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain hammered the old train station roof as midnight passengers clustered beneath flickering lamps, whispering about missed connections and ghosts. Detective Mara Quinn stepped from the last carriage, coat dripping, eyes narrowed, measuring the room before anyone noticed her arrival. A scream rode the wind down the platform, raw and rising, curdling chatter into silence and tightening every spine there. Porter Elias staggered from the ticket booth, face ashen, pointing past track three where a body sprawled beneath advertisements peeling. The businessman lay immaculate except his throat, which gaped like a second mouth, red smile shadowed by a fallen hat. Steam from a parked engine drifted over him, softening edges, while the station clock wheezed midnight again like tired testimony. Mara knelt, resisting the urge to touch, and sent the porter sprinting for constables, her gaze harvesting unsettled faces nearby. A blood bead clung to the victim's earlobe, drying to rust, while his cuff showed a thumbprint smeared in ink. Two travelers argued quietly about luggage ownership, each insisting ignorance of the trunk between them, its brass corners newly scratched. Mara noticed the arrival board frozen on delayed, cities stalled, as though the murderer had paused time to exit unseen.
created_at
"2026-02-16T13:34:48.117222+00:00"
2/16/2026, 1:34:48 PM
model
"openai/gpt-5-2025-08-07"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
19387
moderation_latency
(null)
generation_time
42529
tokens_prompt
46
tokens_completion
1021
native_tokens_prompt
41
native_tokens_completion
2514
native_tokens_completion_images
0
native_tokens_reasoning
2240
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
0.02519125
router
(null)
provider_responses
0
id
"resp_04d8df9994f3e46b0169931ccc52a88193b44a666eb50d79a4"
status
200
is_byok
false
latency
155
endpoint_id
"7c2f859a-7890-4e8e-b1de-1cd1c0a800b4"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5-2025-08-07"
api_type
"completions"
id
"gen-1771248844-kyEdGnpIe2FwwTE0ZUEz"
upstream_id
"resp_04d8df9994f3e46b0169931ccc52a88193b44a666eb50d79a4"
total_cost
0.02519125
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
10
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20
8
20
9
20