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Run: 2026-03-18-01KM08NWA0C0DWT6YEV69H84F8
Run Details
Model:
GPT-5.4 Nano
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
2.0s
Cost:
$0.000188
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
97.41%
Matches word count
(details)
Model input
User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Detectives arrived at dawn, where a museum exhibit lay shattered. The curator screamed softly, then collapsed beside the glass vitrine. Rain tapped windows, while guards checked keys and badge logs. Detective Vale examined footprints leading toward the locked gallery door. Forensics noted no blood, yet the victim's face smiled unnaturally. The curator insisted everyone attended; only one staffer vanished earlier. A clock chimed midnight, though witnesses swore it stopped. Inside the display, a locket held ash instead of jewels. Vale questioned the guard, who trembled when asked about footsteps. Above them, silence pressed down, like secrets sealed in stone.
created_at
"2026-03-18T10:43:18.987Z"
3/18/2026, 10:43:18 AM
model
"openai/gpt-5.4-nano-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1148
moderation_latency
(null)
generation_time
1852
tokens_prompt
46
tokens_completion
178
native_tokens_prompt
41
native_tokens_completion
144
native_tokens_completion_images
0
native_tokens_reasoning
0
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
0.0001882
router
(null)
provider_responses
0
endpoint_id
"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id
"resp_0d5ab35346e9959a0169ba81c710d881978913b6d5cb1e68dd"
is_byok
false
latency
227
model_permaslug
"openai/gpt-5.4-nano-20260317"
provider_name
"OpenAI"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer
(null)
api_type
"completions"
id
"gen-1773830598-CZsunCWORoq8T3ziJBdi"
upstream_id
"resp_0d5ab35346e9959a0169ba81c710d881978913b6d5cb1e68dd"
total_cost
0.0001882
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
97.41%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
9
7
10
8
10
9
10