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Run: 2026-03-18-01KM0ABRCM1BNRGDW3A6PRBJR1
Run Details
Model:
GPT-5.4 Mini (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
7.9s
Cost:
$0.004724
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 guests laughed too loudly, pretending the storm had not trapped them there. Inside the ballroom, candles trembled beside a grand piano, and every mirror reflected faces that already seemed guilty tonight, collectively. At midnight, the housekeeper screamed from the library, and the music stopped so abruptly that even thunder seemed to listen. When they found Lord Ashcombe sprawled beneath the portraits, a pearl-handled letter opener gleamed in his chest like a secret. Detective Mara Vale arrived before dawn, noting every shutter, stain, and alibi, while the corpse's hand still clutched a rose.
created_at
"2026-03-18T11:12:44.45Z"
3/18/2026, 11:12:44 AM
model
"openai/gpt-5.4-mini-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
7659
moderation_latency
(null)
generation_time
7806
tokens_prompt
46
tokens_completion
454
native_tokens_prompt
41
native_tokens_completion
1043
native_tokens_completion_images
0
native_tokens_reasoning
908
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
0.00472425
router
(null)
provider_responses
0
endpoint_id
"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id
"resp_0cca483c8e52a4850169ba88ac831c8190bc23f3083e50d1d1"
is_byok
false
latency
247
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-1773832364-bF9WzjPeUa1Y7tqRBtSr"
upstream_id
"resp_0cca483c8e52a4850169ba88ac831c8190bc23f3083e50d1d1"
total_cost
0.00472425
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