NC Bench
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Run: 2026-02-16-01KHKA1KJ12MSS986YTRH1EZNX
Run Details
Model:
GPT-5.2
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
15.6s
Cost:
$0.010054
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 hammered Blackthorne Manor as midnight swallowed the gardens whole. Inside, candles guttered, painting corridors with nervous, wavering shadows tonight. Lady Ashford hosted twelve guests, all smiling too carefully indoors. Her violinist stopped abruptly, strings shrieking like distant sirens outside. A scream rose upstairs, then silence settled, heavy and final. Colonel Wren found the library locked, yet smelling of roses. When the door yielded, Lord Mercer lay facedown, unmoving there. No weapon showed, only ink stains on his fingertips alone. Detective Hale arrived soaked, studying each guest's trembling alibi quietly. He noticed one clock missing, and every watch running backward.
created_at
"2026-02-16T13:25:56.657639+00:00"
2/16/2026, 1:25:56 PM
model
"openai/gpt-5.2-20251211"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
7059
moderation_latency
(null)
generation_time
15476
tokens_prompt
46
tokens_completion
442
native_tokens_prompt
41
native_tokens_completion
713
native_tokens_completion_images
0
native_tokens_reasoning
560
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
0.01005375
router
(null)
provider_responses
0
id
"resp_0f4b57b8991e276a0169931ad49fcc819080c651377fa1733d"
status
200
is_byok
false
latency
149
endpoint_id
"f00142c2-6a93-49ce-9e36-5593b904ce3b"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5.2-20251211"
api_type
"completions"
id
"gen-1771248340-I3RxdtDpIP48aZnRnPtf"
upstream_id
"resp_0f4b57b8991e276a0169931ad49fcc819080c651377fa1733d"
total_cost
0.01005375
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