NC Bench
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Run: 2026-02-16-01KHKAG71SDJ44P7X3069KANPG
Run Details
Model:
GPT-5 Mini
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
21.7s
Cost:
$0.003316
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
Night swallowed the coastal town. Fog licked the lamplight's edge. A body floated beneath pier. Red stained the wooden boards. Detective Hale arrived, coat drenched. He studied footprints leading away. Neighbors clustered, whispering dead names. Moonlight revealed a bloody note. It read only one sentence. Forgive me, it began simply. A single name was circled. Hale felt the wind shift. Footsteps approached from the darkness. He tightened grip around flashlight. A voice warned from behind. Hale spun, flashlight cutting silhouettes. Silence swallowed the threatening words. He noticed fingerprints on railing. One print matched the dead. Hale studied the circled name. It was her maiden name. A secret returned with tide.
created_at
"2026-02-16T13:34:01.532994+00:00"
2/16/2026, 1:34:01 PM
model
"openai/gpt-5-mini-2025-08-07"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2819
moderation_latency
(null)
generation_time
21568
tokens_prompt
46
tokens_completion
1107
native_tokens_prompt
41
native_tokens_completion
1653
native_tokens_completion_images
0
native_tokens_reasoning
1472
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
0.00331625
router
(null)
provider_responses
0
id
"resp_0cadef91651d966a0169931cb355d881908a43d67a54ae1e6f"
status
200
is_byok
false
latency
126
endpoint_id
"c4f66d01-20b0-4c27-a225-438ea22fda43"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5-mini-2025-08-07"
api_type
"completions"
id
"gen-1771248819-jhqSnYxKsEVNE7J7Sj2E"
upstream_id
"resp_0cadef91651d966a0169931cb355d881908a43d67a54ae1e6f"
total_cost
0.00331625
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
22
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
15
5
16
5
17
5
18
5
19
5
20
5
21
5