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Run: 2026-02-16-01KHKB46HVEVA9N59DAYTEPRYB
Run Details
Model:
GPT-5 Mini
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
35.2s
Cost:
$0.003594
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
Fog clung to the cobblestones as Mrs. Hawthorne discovered the body draped awkwardly beneath the gaslamp's jaundiced light at midnight. Neighbors gathered behind lace curtains, whispering theories while policemen measured footprints and circled the stain like vultures over prey silently. Detective Ames arrived smelling of pipe tobacco, trench coat soaked, eyes scanning faces for lies, alibis, and terrified confessions quickly. The victim's ledger lay open on the sidewalk, its ledger entries smeared, inked promises cancelled by a single invisible hand. A silver cufflink caught moonlight; police notes listed no witnesses, but someone had whispered names into the dead man's ear. Rain began soft as a curtain, erasing footprints, washing secrets down gutters where gossip waits, sharp and patient like knives.
created_at
"2026-02-16T13:45:09.983182+00:00"
2/16/2026, 1:45:09 PM
model
"openai/gpt-5-mini-2025-08-07"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
30420
moderation_latency
(null)
generation_time
35048
tokens_prompt
46
tokens_completion
204
native_tokens_prompt
41
native_tokens_completion
1792
native_tokens_completion_images
0
native_tokens_reasoning
1600
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
0.00359425
router
(null)
provider_responses
0
id
"resp_011ef11e34f3819f0169931f423450819486d41e1ba7d6a8a7"
status
200
is_byok
false
latency
145
endpoint_id
"c4f66d01-20b0-4c27-a225-438ea22fda43"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5-mini-2025-08-07"
api_type
"completions"
id
"gen-1771249474-2z2JKWNsWkHAEiZo9skS"
upstream_id
"resp_011ef11e34f3819f0169931f423450819486d41e1ba7d6a8a7"
total_cost
0.00359425
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
6
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20