NC Bench
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Run: 2026-02-16-01KHKB0GW600S3G48XM18EJXRA
Run Details
Model:
GPT-5.2
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
14.4s
Cost:
$0.011076
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 clung to Marrow Street when Inspector Vale arrived alone. A brass key swung from his glove, still warm somehow. Constables waited silently outside Number Nine, curtains drawn tight inside. From within came no music, only ticking and whispered prayers. Vale entered, smelling coal smoke, roses, and something metallic nearby. On the parlor rug lay Miriam Hodge, eyes open, unblinking. Her teacup stood upright, yet its surface held no steam. A letter rested beneath her hand, sealed with blue wax. Someone had written three names, then scratched out the fourth. Vale pocketed the key, wondering which door it truly opened.
created_at
"2026-02-16T13:42:48.357737+00:00"
2/16/2026, 1:42:48 PM
model
"openai/gpt-5.2-20251211"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4916
moderation_latency
(null)
generation_time
13916
tokens_prompt
46
tokens_completion
565
native_tokens_prompt
41
native_tokens_completion
786
native_tokens_completion_images
0
native_tokens_reasoning
639
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
0.01107575
router
(null)
provider_responses
0
id
"resp_0e4d7cfb8e6cf7c50169931ec9b25c819493922430d3263566"
status
200
is_byok
false
latency
151
endpoint_id
"f00142c2-6a93-49ce-9e36-5593b904ce3b"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5.2-20251211"
api_type
"completions"
id
"gen-1771249353-vI9KtXZrscFpkyoZUzpJ"
upstream_id
"resp_0e4d7cfb8e6cf7c50169931ec9b25c819493922430d3263566"
total_cost
0.01107575
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
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10