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Run: 2026-02-16-01KHK9ADACDAZXH5RT2GKSWQ0Y
Run Details
Model:
GPT-5
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
1m 6s
Cost:
$0.042901
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 stitched darkness over Hawthorn. The mansion watched, windows unblinking. Detective Mara Quinn arrived late. Her coat dripped patient rivers. The butler's hands shook twice. He whispered, Master will not. Mara smelled copper, old wallpaper. A grandfather clock had stopped. Its hands severed at midnight. Footprints bloomed across Persian carpets. One set faced the door. Another vanished into lamplight silence. Thunder rehearsed excuses for screams. The library reeked of brandy. On velvet, a letter opener. Its tip wore choked crimson. No corpse, only practiced absence. Curtains breathed like guilty lungs. A portrait watched her accusations. It favored the missing heir. Mara cataloged everything, asked nothing. Silence filled in reluctant answers. She noticed damp ash prints. They circled the empty hearth. Wind bullied the back door. Its chain hung politely broken. An ambulance wailed without corpses. Neighbors gathered, clutching shared alibis. Someone wept, no tears came. Mara found the power switch. Light exposed a second message. Dust spelled help in footprints. Under it: three lonely matches. She pocketed two, left one. Upstairs, a hinge confessed softly. A shadow waited, breathing patience.
created_at
"2026-02-16T13:14:06.931329+00:00"
2/16/2026, 1:14:06 PM
model
"openai/gpt-5-2025-08-07"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3668
moderation_latency
(null)
generation_time
65863
tokens_prompt
46
tokens_completion
1844
native_tokens_prompt
41
native_tokens_completion
4285
native_tokens_completion_images
0
native_tokens_reasoning
3968
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
0.04290125
router
(null)
provider_responses
0
id
"resp_0c90989b7172b86501699317dca0e481969ac7e72b432063de"
status
200
is_byok
false
latency
146
endpoint_id
"7c2f859a-7890-4e8e-b1de-1cd1c0a800b4"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5-2025-08-07"
api_type
"completions"
id
"gen-1771247580-8rqrJMgVwvjY5YNEAwJy"
upstream_id
"resp_0c90989b7172b86501699317dca0e481969ac7e72b432063de"
total_cost
0.04290125
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
36
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
35
5