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Run: 2026-03-18-01KM07HM5NHHN0MJXB6BX814ZK
Run Details
Model:
GPT-5.4 Mini (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
11.0s
Cost:
$0.003451
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 silver lines across Blackthorn Manor as Inspector Vale climbed the steps, summoned by a scream no one repeated. Inside, candlelight trembled over shattered glass, and the household stood frozen around the library door, each face carefully innocent tonight. Vale noticed the lock intact, the window latched, and a single crimson glove lying beside the body, still warm beneath. When the maƮtre d' whispered the victim's name, every guest turned toward the portrait above the mantel, ashen and silent. Inspector Vale smiled thinly, because the murderer had already made one mistake, and the storm outside would soon confess everything.
created_at
"2026-03-18T10:23:31.008Z"
3/18/2026, 10:23:31 AM
model
"openai/gpt-5.4-mini-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
10528
moderation_latency
(null)
generation_time
10615
tokens_prompt
46
tokens_completion
631
native_tokens_prompt
41
native_tokens_completion
760
native_tokens_completion_images
0
native_tokens_reasoning
630
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
0.00345075
router
(null)
provider_responses
0
endpoint_id
"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id
"resp_02aebd64d9bcdcf90169ba7d230f988190bf8b6dc32375cab4"
is_byok
false
latency
244
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-1773829411-cmlEc4i2wQUw1aIFzs6q"
upstream_id
"resp_02aebd64d9bcdcf90169ba7d230f988190bf8b6dc32375cab4"
total_cost
0.00345075
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