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Run: 2026-02-16-01KHK9JAHDKPN7SBY0ZQSRXY7X
Run Details
Model:
GPT-5 Mini
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
18.6s
Cost:
$0.003736
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
Fog swallowed the harbor, muffling footsteps along the slick dock. A copper lantern swung, painting ghosts on weathered cedar planks. Detective Marlowe lit a cigarette, watching ripples scatter moonlight quietly. Tonight's victim lay still, coat buttoned, eyes fixed upward composed. Blood darkened the collar, a neat, almost delicate stain there. No weapon was visible; only the whisper of furious struggle. Nearby footprints headed toward the bluff and then vanished suddenly. A woman in violet watched from a shadowed doorway, trembling. She held a telegram, edges soaked with seawater and dread. Marlowe crouched, noting the angle of throat wound carefully now. Something about the tilt smelled familiar: jasmine, rain, and gunpowder. He whispered the victim's name, as if summoning an echo.
created_at
"2026-02-16T13:17:38.999115+00:00"
2/16/2026, 1:17:38 PM
model
"openai/gpt-5-mini-2025-08-07"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2358
moderation_latency
(null)
generation_time
18395
tokens_prompt
46
tokens_completion
900
native_tokens_prompt
41
native_tokens_completion
1863
native_tokens_completion_images
0
native_tokens_reasoning
1664
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
0.00373625
router
(null)
provider_responses
0
id
"resp_078a3b4b73be884501699318dfe29c819695c8a5bdbc92e7c8"
status
200
is_byok
false
latency
167
endpoint_id
"c4f66d01-20b0-4c27-a225-438ea22fda43"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5-mini-2025-08-07"
api_type
"completions"
id
"gen-1771247839-bkw8jmEHN2LnhK30gEga"
upstream_id
"resp_078a3b4b73be884501699318dfe29c819695c8a5bdbc92e7c8"
total_cost
0.00373625
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
12
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