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Run: 2026-03-18-01KM0AMBGTFSANAYXBXW16XT1V
Run Details
Model:
GPT-5.4 Mini (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
10.7s
Cost:
$0.003689
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 black, and Detective Mara Vale found the body beneath the pier, waiting like a terrible answer. A single lantern swung overhead, turning the victim's silver cufflinks into accusing eyes that flashed whenever the water shifted below. Mara knelt, smelled salt and copper, then noticed three footprints in the mud, each made by a different shoe size. Behind her, the ferry horn moaned, and every dockworker suddenly found urgent reasons to stare anywhere except the corpse below. Mara rose, meeting the crew's silence with a smile that promised trouble, because the killer had already slipped inside somewhere.
created_at
"2026-03-18T11:17:26.186Z"
3/18/2026, 11:17:26 AM
model
"openai/gpt-5.4-mini-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
10447
moderation_latency
(null)
generation_time
10577
tokens_prompt
46
tokens_completion
609
native_tokens_prompt
41
native_tokens_completion
813
native_tokens_completion_images
0
native_tokens_reasoning
684
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
0.00368925
router
(null)
provider_responses
0
endpoint_id
"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id
"resp_0c78f5b000d9ac6c0169ba89c645488194b46cdfdb063a3737"
is_byok
false
latency
241
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-1773832646-s5vP5rpFoYaI6h5aqow9"
upstream_id
"resp_0c78f5b000d9ac6c0169ba89c645488194b46cdfdb063a3737"
total_cost
0.00368925
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