NC Bench
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Run: 2026-02-16-01KHK9W91DAEWES0GY1TCS4PCR
Run Details
Model:
GPT-5.2
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
13.5s
Cost:
$0.011034
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 pressed against Harbor Street, muffling footsteps at midnight sharp. Detective Mara Quinn watched the lighthouse blink, once, twice, then. A scream dissolved quickly, swallowed by waves and distant engines. She found the pier gate open, chain snapped cleanly tonight. On wet planks lay Councilman Hargrove, face down, unmoving still. His silver pocketwatch ticked loudly, stopped exactly at twelve minutes. A single glove rested nearby, stitched with crimson initial M. Mara crouched, smelling cordite, brine, and expensive cologne mingled here. Footprints led toward town, but ended beside a moored skiff. Behind her, someone whispered, 'Detective,' and clicked a safety off.
created_at
"2026-02-16T13:23:00.417151+00:00"
2/16/2026, 1:23:00 PM
model
"openai/gpt-5.2-20251211"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4883
moderation_latency
(null)
generation_time
13328
tokens_prompt
46
tokens_completion
436
native_tokens_prompt
41
native_tokens_completion
783
native_tokens_completion_images
0
native_tokens_reasoning
620
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
0.01103375
router
(null)
provider_responses
0
id
"resp_06ee907d82da94f20169931a2604288196b1ce204ccd669f79"
status
200
is_byok
false
latency
171
endpoint_id
"f00142c2-6a93-49ce-9e36-5593b904ce3b"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5.2-20251211"
api_type
"completions"
id
"gen-1771248165-xhOLVdqcjQKqDEk4h4Dc"
upstream_id
"resp_06ee907d82da94f20169931a2604288196b1ce204ccd669f79"
total_cost
0.01103375
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