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Run: 2026-03-18-01KM07M7WWBREK3EV9ZCYHBJES
Run Details
Model:
GPT-5.4 Mini
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
1.1s
Cost:
$0.000535
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
Fog pressed against Blackthorn Manor as Inspector Vale arrived, noting the music had stopped abruptly, leaving only rain and silence. In the foyer, servants stood rigidly beneath chandeliers, while Lady Harrington clutched a letter opener, her knuckles white with terror. Then Vale saw Sir Julian lying beside the grand piano, one shoe missing, a crimson stain spreading across the marble. Nobody spoke when the widow whispered that the killer was still inside, and every locked door seemed to confirm it.
created_at
"2026-03-18T10:24:56.748Z"
3/18/2026, 10:24:56 AM
model
"openai/gpt-5.4-mini-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
401
moderation_latency
(null)
generation_time
1052
tokens_prompt
46
tokens_completion
133
native_tokens_prompt
41
native_tokens_completion
112
native_tokens_completion_images
0
native_tokens_reasoning
0
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
0.00053475
router
(null)
provider_responses
0
endpoint_id
"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id
"resp_07e9f30dab6948430169ba7d78cf548194a8911b158c1a5386"
is_byok
false
latency
182
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-1773829496-szxbtSjxulboFNOJtceR"
upstream_id
"resp_07e9f30dab6948430169ba7d78cf548194a8911b158c1a5386"
total_cost
0.00053475
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
4
wordCounts
0
20
1
20
2
20
3
20