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Run: 2026-03-18-01KM07T1P8EAY55MNEGKEDM2VX
Run Details
Model:
GPT-5.4 Mini
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
1.4s
Cost:
$0.000742
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
59.36%
Matches word count
(details)
Model input
User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain needled the windows of Blackmere Manor, and Inspector Vale arrived to find the guesthouse candle still burning downstairs. Inside, the servants whispered, the clocks had stopped at eleven, and Lady Ashford’s body lay beneath the grand staircase. A silver letter opener rested near her hand, yet the blood on its hilt looked too fresh for a suicide. Vale noticed three muddy footprints crossing the marble, each smaller than the last, leading toward the library’s locked door. When the housekeeper swore nobody had entered that room, a faint tapping sounded from within, like fingernails on wood. Vale turned the handle slowly, and the room answered with silence, a shattered vase, and one missing portrait.
created_at
"2026-03-18T10:28:07Z"
3/18/2026, 10:28:07 AM
model
"openai/gpt-5.4-mini-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
451
moderation_latency
(null)
generation_time
1238
tokens_prompt
46
tokens_completion
186
native_tokens_prompt
41
native_tokens_completion
158
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
0.00074175
router
(null)
provider_responses
0
endpoint_id
"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id
"resp_0841beb341de7e7a0169ba7e3715bc8197a9868de06b58a8b4"
is_byok
false
latency
235
model_permaslug
"openai/gpt-5.4-mini-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-1773829687-ETM6812X34VJvYhbACUt"
upstream_id
"resp_0841beb341de7e7a0169ba7e3715bc8197a9868de06b58a8b4"
total_cost
0.00074175
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
59.36%
Matches word count
n/a
neededClean
false
sentences
6
wordCounts
0
19
1
19
2
20
3
19
4
19
5
18