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Run: 2026-02-16-01KHK9VEZRBSHFMAFSJKZAYSFZ
Run Details
Model:
GPT-5.1
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
29.8s
Cost:
$0.016311
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 erased footprints along pier. Yellow tape fluttered, snapping warnings. Detective Mara Quinn studied everything. The body rocked with waves. Harbor lights painted bruises silver. Paramedics waited, already too late. Seagulls jeered above the sirens. Mara crouched beside the corpse. Male, thirties, dressed for celebration. Glitter clung to his knuckles. A party wristband encircled tightly. No wallet, no phone, nothing. His eyes stared past everything. Mara noted lividity, checked pulse. A jagged wound marred temple. Not from waves, she thought. Officer Diaz hovered behind her. He smelled of rain, diesel. Coasties found him near midnight. Floating face-down, wedged against pylons. Thought he was another drunk. Dock cameras were cut earlier. Mara's pen stopped mid-scribble suddenly. Cut by whom, and why? Diaz shifted, boots dripping seawater. He offered coffee, she refused. Her eyes mapped surrounding boats. Most cabins dark, curtains closed. Except one yacht glowing warmly. Music drifted, soft and wrong. Someone still celebrated the festival. Someone not asking about screams. Mara rose, raincoat whispering plastic. She told Diaz, 'Secure everything.' Then she walked toward yacht. Behind her, waves erased blood.
created_at
"2026-02-16T13:22:49.486531+00:00"
2/16/2026, 1:22:49 PM
model
"openai/gpt-5.1-20251113"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
27294
moderation_latency
(null)
generation_time
29687
tokens_prompt
46
tokens_completion
352
native_tokens_prompt
41
native_tokens_completion
1626
native_tokens_completion_images
0
native_tokens_reasoning
1312
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
0.01631125
router
(null)
provider_responses
0
id
"resp_043c57e839f27e730169931a0b58c0819092ae6135eb1e145d"
status
200
is_byok
false
latency
205
endpoint_id
"764eb97f-8bab-4326-b29b-7a8799b00a70"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5.1-20251113"
api_type
"completions"
id
"gen-1771248139-OTx75AzXc3Pu9YqSkxCa"
upstream_id
"resp_043c57e839f27e730169931a0b58c0819092ae6135eb1e145d"
total_cost
0.01631125
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
98.7711%
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
6
20
5
21
5
22
6
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