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Run: 2026-03-09-01KKACBP7HNZA0SSQCYCRKRP2G
Run Details
Model:
GPT-5.4 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
16.5s
Cost:
$0.015973
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 worried the manor windows while guests assembled beneath the chandelier, pretending warmth, though every polished surface reflected suspicion already. At precisely eight, Lady Wren dismissed the musicians, and silence entered first, gloved and smiling, before the body appeared upstairs. No one admitted hearing the scream, yet everyone remembered the clock's bronze raven striking once, then choking mid-note above them. When the butler opened the library door, candlelight revealed Sir Alistair collapsed beside the atlas, one hand blackened with poison. His other hand clutched a torn photograph showing all seven guests, although someone had carefully scratched out one face entirely. Inspector Vale arrived through thunder and mud, surveyed the room once, and remarked that murder had excellent timing tonight indeed. Then he noticed the extinguished fireplace, untouched brandy, and a fresh rose petal hidden inside Alistair's left shoe that night. By the time lightning whitened the hall again, every guest had acquired an alibi, and none had improved one bit.
created_at
"2026-03-09T22:44:21.885Z"
3/9/2026, 10:44:21 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
14772
moderation_latency
(null)
generation_time
16098
tokens_prompt
46
tokens_completion
274
native_tokens_prompt
41
native_tokens_completion
1058
native_tokens_completion_images
0
native_tokens_reasoning
848
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
0.0159725
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_00ad1cb562e5c92d0169af4d462a808197a98a74f95e16e750"
is_byok
false
latency
337
model_permaslug
"openai/gpt-5.4-20260305"
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-1773096261-75NQyF5awAp5zZ8rR4Ia"
upstream_id
"resp_00ad1cb562e5c92d0169af4d462a808197a98a74f95e16e750"
total_cost
0.0159725
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
8
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20