NC Bench
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Run: 2026-02-16-01KHKAERBHPZZ7DERX4NHDZ3VG
Run Details
Model:
GPT-5.2
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
12.0s
Cost:
$0.009858
Provider:
OpenAI
Model input
User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 5 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain stitched the harbor night. Detective Mara Voss arrived alone. A scream died behind warehouses. Docklights flickered like guilty eyes. She followed bootprints through salt. The pier smelled of copper. Someone lay beneath tarps quietly. Mara lifted one corner carefully. A businessman stared upward, unblinking. His throat wore a key. In his fist, sand glittered. A note whispered, 'Find Lark'. Footsteps retreated across puddles nearby. Mara pocketed the wet note. Then the tide swallowed secrets.
created_at
"2026-02-16T13:33:04.320755+00:00"
2/16/2026, 1:33:04 PM
model
"openai/gpt-5.2-20251211"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
5395
moderation_latency
(null)
generation_time
11873
tokens_prompt
46
tokens_completion
409
native_tokens_prompt
41
native_tokens_completion
699
native_tokens_completion_images
0
native_tokens_reasoning
569
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
0.00985775
router
(null)
provider_responses
0
id
"resp_0503bded094ffac60169931c8386648195a20a011351ff8582"
status
200
is_byok
false
latency
156
endpoint_id
"f00142c2-6a93-49ce-9e36-5593b904ce3b"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5.2-20251211"
api_type
"completions"
id
"gen-1771248771-jNwjigglMmllK8DzpkS1"
upstream_id
"resp_0503bded094ffac60169931c8386648195a20a011351ff8582"
total_cost
0.00985775
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
15
wordCounts
0
5
1
5
2
5
3
5
4
5
5
5
6
5
7
5
8
5
9
5
10
5
11
5
12
5
13
5
14
5