NC Bench
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Run: 2026-02-16-01KHKARXA9GGQM89DM5RB5ZD5P
Run Details
Model:
GPT-5 Mini
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
20.3s
Cost:
$0.003142
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 dragged footprints across cobblestones. Lamp flickered by the doorway. Something heavy lay under coat. Crimson stain scored his shirt. Neighbors whispered behind curtained windows. Clock stopped dead at midnight. Footsteps approached, then suddenly halted. She opened the door slowly. Her face was pale, unreadable. Detective knelt beside the body. He listened to the silence. Something metallic glinted near fingers. Paper fluttered, a torn photograph. Names scratched into the glass. The rain kept faithful rhythm.
created_at
"2026-02-16T13:38:45.351469+00:00"
2/16/2026, 1:38:45 PM
model
"openai/gpt-5-mini-2025-08-07"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2771
moderation_latency
(null)
generation_time
20131
tokens_prompt
46
tokens_completion
810
native_tokens_prompt
41
native_tokens_completion
1566
native_tokens_completion_images
0
native_tokens_reasoning
1408
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
0.00314225
router
(null)
provider_responses
0
id
"resp_0cc2ff98d83ecab50169931dd046748197b6eafdd7b692521e"
status
200
is_byok
false
latency
167
endpoint_id
"c4f66d01-20b0-4c27-a225-438ea22fda43"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5-mini-2025-08-07"
api_type
"completions"
id
"gen-1771249104-yF54Bw4ujsEu5dLaFCjn"
upstream_id
"resp_0cc2ff98d83ecab50169931dd046748197b6eafdd7b692521e"
total_cost
0.00314225
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