NC Bench
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Run: 2026-02-16-01KHKA67GHJGWGCV8BTEZJ00E7
Run Details
Model:
GPT-5.2
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
12.5s
Cost:
$0.010712
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 St. Brigid's pier, drowning the lighthouse bell tonight. Detective Mara Quinn arrived late, coat heavy with saltwater spray. Fishermen watched silently, faces pale beneath yellow docklamps flickering overhead. A body lay curled inside the net shed, unseen until. Mara knelt close, noting rope burns and missing wedding ring. Captain Doyle swore the victim, Jonah Pike, feared nobody here. Yet Jonah's ledger vanished, along with keys to locker seven. From the fog, a harmonica moaned, then abruptly stopped cold. Mara followed that silence, tasting blood in the wind already. Somewhere nearby, someone held their breath, counting her footsteps carefully.
created_at
"2026-02-16T13:28:25.127001+00:00"
2/16/2026, 1:28:25 PM
model
"openai/gpt-5.2-20251211"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
11271
moderation_latency
(null)
generation_time
12434
tokens_prompt
46
tokens_completion
179
native_tokens_prompt
41
native_tokens_completion
760
native_tokens_completion_images
0
native_tokens_reasoning
604
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
0.01071175
router
(null)
provider_responses
0
id
"resp_0a1881be61aee18a0169931b6c21708193892e3ae68d6c029b"
status
200
is_byok
false
latency
176
endpoint_id
"f00142c2-6a93-49ce-9e36-5593b904ce3b"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5.2-20251211"
api_type
"completions"
id
"gen-1771248492-A73ydS522rm2bD6Ax3cx"
upstream_id
"resp_0a1881be61aee18a0169931b6c21708193892e3ae68d6c029b"
total_cost
0.01071175
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