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Run: 2026-02-16-01KHK9N5XT28NVER0SNWQAZYKC
Run Details
Model:
GPT-5
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
1m 14s
Cost:
$0.038311
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 the harbor black. Sirens tangled with gulls' cries. Detective Mara Lake arrived late. Her umbrella bled thin stripes. The pier lamps flickered nervous. Officers guarded a cordoned rectangle. Wet chalk outlined unseen absence. A fisherman watched, knuckles whitening. Mara addressed the shivering fisherman. He nodded, eyes on water. His net snagged something earlier. Thought it debris, not her. Mara crouched beside the sheets. The body waited, quiet accusation. Lotus tattoo circled one ankle. A ring gleamed, cracked glass. Lipstick smeared like sunset rust. Tide whispered private, sibilant secrets. She tagged the scattered footprints. Two sizes, hurried, overlapping directions. Camera flashed; gulls recoiled skyward. The harbormaster approached, smelling diesel. Storm's rising, he warned flatly. Mara studied the broken railing. Fresh splinters pointed seaward, accusing. Boat lights bobbed like lanterns. Somewhere, a dog barked twice. Radio crackled names and addresses. Identify her, someone asked softly. Mara lifted the chipped necklace. Letters hid beneath dark grime. She rubbed, revealing barely initials. L and V, entwined carelessly. The fisherman crossed himself quickly. You knew her, Mara pressed. He swallowed, then looked away. Worked nights at Vesper Lounge. Sang Thursdays, drank after closing. Fought last week with manager. Over tips, and something else. Waves thudded against barnacled pilings. Mara pocketed the fragile necklace. Rain thickened, cloaking every breath. Somewhere, footsteps retreated, then stopped.
created_at
"2026-02-16T13:20:08.155099+00:00"
2/16/2026, 1:20:08 PM
model
"openai/gpt-5-2025-08-07"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3657
moderation_latency
(null)
generation_time
73537
tokens_prompt
46
tokens_completion
1650
native_tokens_prompt
41
native_tokens_completion
3826
native_tokens_completion_images
0
native_tokens_reasoning
3456
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
0.03831125
router
(null)
provider_responses
0
id
"resp_06e7f4f3d0d24cae016993193d71708197815a7aa57c0b9af8"
status
200
is_byok
false
latency
123
endpoint_id
"7c2f859a-7890-4e8e-b1de-1cd1c0a800b4"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5-2025-08-07"
api_type
"completions"
id
"gen-1771247933-h67ytnfMLkgvhaB70iG6"
upstream_id
"resp_06e7f4f3d0d24cae016993193d71708197815a7aa57c0b9af8"
total_cost
0.03831125
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
44
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
36
5
37
5
38
5
39
5
40
5
41
5
42
5
43
5