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Run: 2026-03-18-01KM08594546FY6XF62VSEXT8N
Run Details
Model:
GPT-5.4 Mini (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
10.8s
Cost:
$0.003644
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 as Detective Mara Vale stepped from her car, already knowing someone was dead. The lighthouse bell had stopped at midnight, and now its silence pressed against the docks like a held breath there. A body lay beneath the fishing nets, face turned to the rain, one hand clutching a brass room key firmly. Mara knelt beside him, noticing the puncture wound hidden under seawater, and the impossible detail everyone else had missed completely. Inside the darkened inn, a piano played one uncertain note, and Mara knew the killer was still listening upstairs closely.
created_at
"2026-03-18T10:34:15.06Z"
3/18/2026, 10:34:15 AM
model
"openai/gpt-5.4-mini-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
10407
moderation_latency
(null)
generation_time
10610
tokens_prompt
46
tokens_completion
580
native_tokens_prompt
41
native_tokens_completion
803
native_tokens_completion_images
0
native_tokens_reasoning
674
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
0.00364425
router
(null)
provider_responses
0
endpoint_id
"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id
"resp_06fb3ee66b823cc20169ba7fa71f888197b5727952908bd59f"
is_byok
false
latency
193
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-1773830055-qObrrBr4GfpnWm52KWtT"
upstream_id
"resp_06fb3ee66b823cc20169ba7fa71f888197b5727952908bd59f"
total_cost
0.00364425
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