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Run: 2026-02-16-01KHKA6SRHVEAJ2C1AG3W090TH
Run Details
Model:
GPT-5
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
43.5s
Cost:
$0.027181
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 pinned shadows to cobblestones. The town clock chimed midnight. Detective Mora studied shuttered windows. A scream severed the silence. Footsteps scattered like startled pigeons. The gaslights trembled, eyes narrowed. She tasted copper and fog. An umbrella lay, ribs broken. Crimson threaded the gutter’s run. A glove pointed toward thirteen. Curtains twitched, then stilled flat. Mora knocked; the door sighed. Warmth fled the narrow hallway. Photographs watched from tilted frames. The parlor smelled of violets. A metronome ticked, unkindly patient. On velvet, a locket gleamed. Inside, hair coiled like questions. The grandfather clock swallowed time. Someone breathed beneath the stairs. Mora whispered, "Come out, please." A hinge wept, slow tears. The tenant emerged, shaking petals. Blood flecked her white slippers. "He promised," she said, trembling. Thunder interrupted further practiced denials. Mora lifted the hallway carpet. A blade clinked beneath boards. Embossing spelled a family name. Portrait eyes refused to blink. Secrets gathered like waiting crows. Outside, sirens braided with rain. Somewhere, a phone rang unanswered. The metronome finally stopped ticking. Silence stood, holding the knife.
created_at
"2026-02-16T13:29:14.812295+00:00"
2/16/2026, 1:29:14 PM
model
"openai/gpt-5-2025-08-07"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4608
moderation_latency
(null)
generation_time
43332
tokens_prompt
46
tokens_completion
949
native_tokens_prompt
41
native_tokens_completion
2713
native_tokens_completion_images
0
native_tokens_reasoning
2432
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
0.02718125
router
(null)
provider_responses
0
id
"resp_0e403a0b91c209e10169931b7ed18c819795ff137f7ed21453"
status
200
is_byok
false
latency
155
endpoint_id
"7c2f859a-7890-4e8e-b1de-1cd1c0a800b4"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5-2025-08-07"
api_type
"completions"
id
"gen-1771248510-8Okz5lmXBu9oL1BpfZ1L"
upstream_id
"resp_0e403a0b91c209e10169931b7ed18c819795ff137f7ed21453"
total_cost
0.02718125
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
35
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
23
5
24
5
25
5
26
5
27
5
28
5
29
5
30
5
31
5
32
5
33
5
34
5