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Run: 2026-03-18-01KM08CWC36XD8KQKZ9H2SG6JJ
Run Details
Model:
GPT-5.4 Mini (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
10.1s
Cost:
$0.003442
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 stitched the harbor into silver threads, and Inspector Vale arrived just as the lighthouse bell began its mournful toll. At the end of the pier, a body lay beside the mooring posts, one hand clutching a torn invitation card. The guests clustered under black umbrellas, each pretending surprise while silently measuring who among them had motive enough tonight perhaps. Vale knelt, lifted the victim's wrist, and found a watch stopped at eleven seventeen, though the tide was rising fast. When he stood, the widow was smiling, and in her gloved fingers rested the missing knife, still wet with rain.
created_at
"2026-03-18T10:38:24.146Z"
3/18/2026, 10:38:24 AM
model
"openai/gpt-5.4-mini-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
9701
moderation_latency
(null)
generation_time
9897
tokens_prompt
46
tokens_completion
629
native_tokens_prompt
41
native_tokens_completion
758
native_tokens_completion_images
0
native_tokens_reasoning
627
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
0.00344175
router
(null)
provider_responses
0
endpoint_id
"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id
"resp_0dbf785e542a9baa0169ba80a0387881968af4acbbc7de6aea"
is_byok
false
latency
215
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-1773830304-4tdt2motGQVvjzDFFATp"
upstream_id
"resp_0dbf785e542a9baa0169ba80a0387881968af4acbbc7de6aea"
total_cost
0.00344175
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
5
wordCounts
0
20
1
20
2
20
3
20
4
20