NC Bench
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Run: 2026-02-16-01KHKAD5GFPBCRJC0F1TVK9429
Run Details
Model:
GPT-5 Mini
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
24.3s
Cost:
$0.004130
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
Midnight rain tapped the windows. Candlelight carved shadows across carpet. He found her on floor. Blood pooled like stale wine. A photograph lay, edges damp. The portrait smiled despite everything. Police tape fluttered like ribbon. Neighbors whispered behind drawn curtains. Detective Marlowe crouched, studying scene. He smelled perfume and whiskey. There was a single footprint. It led toward the harbor. A clock stopped at midnight. Marlowe lit another cigarette, silently. He did not yet speak. Someone watched from the stairway. Footsteps retreated into shadowed hallway. The city held its breath. Secrets rustled beneath the wallpaper. A name echoed in mind. He tucked the photograph away. Questions piled like unopened mail. Night promised more dark revelations.
created_at
"2026-02-16T13:32:24.215679+00:00"
2/16/2026, 1:32:24 PM
model
"openai/gpt-5-mini-2025-08-07"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2815
moderation_latency
(null)
generation_time
24079
tokens_prompt
46
tokens_completion
873
native_tokens_prompt
41
native_tokens_completion
2060
native_tokens_completion_images
0
native_tokens_reasoning
1856
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
0.00413025
router
(null)
provider_responses
0
id
"resp_0fc264e0d65056e20169931c4f7c088190bc0d2823cdfafdf2"
status
200
is_byok
false
latency
155
endpoint_id
"c4f66d01-20b0-4c27-a225-438ea22fda43"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5-mini-2025-08-07"
api_type
"completions"
id
"gen-1771248719-oQGYS1NkKbv56oav75vG"
upstream_id
"resp_0fc264e0d65056e20169931c4f7c088190bc0d2823cdfafdf2"
total_cost
0.00413025
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
23
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
22
5