NC Bench
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Run: 2026-02-16-01KHK96026KFAFTXM235T69873
Run Details
Model:
GPT-5.2
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
11.1s
Cost:
$0.008332
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
Fog clung to Alderwick Pier. The lighthouse blinked, slow, indifferent. Marian Vale arrived before dawn. Her boots whispered on planks. A gull screamed, then vanished. She found a lantern burning. Beside it lay Colonel Strath. His throat wore a ribbon. The ribbon was navy silk. Marian pocketed it, trembling slightly. Footprints circled, then stopped abruptly. Someone watched from misty shadows. A clockwork locket ticked nearby. It carried her name inside. Marian exhaled, counting suspects silently.
created_at
"2026-02-16T13:10:47.184098+00:00"
2/16/2026, 1:10:47 PM
model
"openai/gpt-5.2-20251211"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4954
moderation_latency
(null)
generation_time
10827
tokens_prompt
46
tokens_completion
467
native_tokens_prompt
41
native_tokens_completion
590
native_tokens_completion_images
0
native_tokens_reasoning
456
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
0.00833175
router
(null)
provider_responses
0
id
"resp_066663e90240e3d7016993174bec548193b8effd4b450e9c27"
status
200
is_byok
false
latency
146
endpoint_id
"f00142c2-6a93-49ce-9e36-5593b904ce3b"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5.2-20251211"
api_type
"completions"
id
"gen-1771247435-sUKjcdeNQQw2OdIhJtQl"
upstream_id
"resp_066663e90240e3d7016993174bec548193b8effd4b450e9c27"
total_cost
0.00833175
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