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Run: 2026-03-18-01KM099SR6FHA3AFS8Q02Q255N
Run Details
Model:
GPT-5.4 Mini (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
18.3s
Cost:
$0.013292
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
100.00%
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 pressed against the manor windows as Inspector Vale arrived, and his coat and thoughts were already damp with dread. The housekeeper opened the door without speaking, and the silence beyond her seemed rehearsed, deliberate, and strangely guilty already tonight. In the library, Lord Marrow lay slumped beside the fire, one hand reaching toward a shattered crystal decanter, already cold. Vale noticed the missing watch first, then the bloodless smile, then the chessboard set for a game unfinished by midnight. A silver letter opener glinted beneath Marrow's fingers, and beside it, a faint perfume lingered, expensive and unfamiliar to Vale. Outside, thunder rolled like a verdict, and Inspector Vale understood the murderer had stayed close enough to watch every move.
created_at
"2026-03-18T10:54:11.736Z"
3/18/2026, 10:54:11 AM
model
"openai/gpt-5.4-mini-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
17965
moderation_latency
(null)
generation_time
18161
tokens_prompt
46
tokens_completion
853
native_tokens_prompt
41
native_tokens_completion
2947
native_tokens_completion_images
0
native_tokens_reasoning
2790
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
0.01329225
router
(null)
provider_responses
0
endpoint_id
"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id
"resp_034faee62dedb21e0169ba8453c9488195bc2f40ae02deff33"
is_byok
false
latency
192
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-1773831251-QqAHhHVzYftxBQpVqBFs"
upstream_id
"resp_034faee62dedb21e0169ba8453c9488195bc2f40ae02deff33"
total_cost
0.01329225
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
6
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20