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Run: 2026-02-16-01KHKA14K5S42JAJ0H79X9MH2P
Run Details
Model:
GPT-5 Mini
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
33.6s
Cost:
$0.005532
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
Midnight rain polished the cobbles; streetlamps pooled yellow sorrow, while Officer Hale discovered a body behind the bakery shutters alone. Her coat clung to ruined lace; a single glove lay twisted, fingers pointing uselessly toward the alley's yawning dark mouth. Shoppers' shutters flicked like bees as the rumor raced ahead, reckless and gleaming, gathering people in lantern-lit knots by curiosity. The victim's face was blank, as if sleep had stolen the expression that once mapped a thousand smiles and regrets. Detective Marlow knelt, cigarette trembling in hand, eyes narrowing against rain and something sharper: suspicion's old, familiar ache and memory. He traced a faint shoeprint with gloved finger, imagining the last steps, the hurry, and the deliberate pause before leaving.
created_at
"2026-02-16T13:25:59.453755+00:00"
2/16/2026, 1:25:59 PM
model
"openai/gpt-5-mini-2025-08-07"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2127
moderation_latency
(null)
generation_time
33419
tokens_prompt
46
tokens_completion
1048
native_tokens_prompt
41
native_tokens_completion
2761
native_tokens_completion_images
0
native_tokens_reasoning
2560
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
0.00553225
router
(null)
provider_responses
0
id
"resp_075a531b1f3063480169931ac54bf08190a5c26234f230d0f5"
status
200
is_byok
false
latency
153
endpoint_id
"c4f66d01-20b0-4c27-a225-438ea22fda43"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5-mini-2025-08-07"
api_type
"completions"
id
"gen-1771248325-gbs7e0M9Yaqvb75wnBzz"
upstream_id
"resp_075a531b1f3063480169931ac54bf08190a5c26234f230d0f5"
total_cost
0.00553225
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
93.4422%
Matches word count
n/a
neededClean
false
sentences
6
wordCounts
0
20
1
20
2
21
3
20
4
20
5
20