NC Bench
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Run: 2026-02-16-01KHK99PADJ9VFND82XQ6GQA2R
Run Details
Model:
GPT-5 Mini
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
16.3s
Cost:
$0.002606
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 soaked the cobblestones beneath the gaslight's wavering orange glow. Detective Rowan arrived, hat dripping, coat heavy with wet dread. They found her sprawled, fingers curled around a jeweled locket. No visible wound, only a pale face and closed eyes. A smear of blood stained the hem of her gown. Neighbors whispered behind curtains; candles flickered like guilty little secrets. Rowan pocketed a single glove, already imagining the tangled motives. Somewhere a clock chimed three; footsteps receded into sodden night.
created_at
"2026-02-16T13:12:53.86948+00:00"
2/16/2026, 1:12:53 PM
model
"openai/gpt-5-mini-2025-08-07"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2090
moderation_latency
(null)
generation_time
16182
tokens_prompt
46
tokens_completion
766
native_tokens_prompt
41
native_tokens_completion
1298
native_tokens_completion_images
0
native_tokens_reasoning
1152
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
0.00260625
router
(null)
provider_responses
0
id
"resp_08dfe4e8bb00381401699317c507548197bf67fe2195e8beef"
status
200
is_byok
false
latency
139
endpoint_id
"c4f66d01-20b0-4c27-a225-438ea22fda43"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5-mini-2025-08-07"
api_type
"completions"
id
"gen-1771247556-OohMwW9HaT5rzjjEPsLE"
upstream_id
"resp_08dfe4e8bb00381401699317c507548197bf67fe2195e8beef"
total_cost
0.00260625
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
8
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10