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Run: 2026-03-09-01KKAC5YHBT2AS000YCA2PV7BA
Run Details
Model:
GPT-5.4 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
10.6s
Cost:
$0.011728
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 threaded silver needles through Blackthorn Manor's courtyard as Inspector Vale arrived, summoned before dawn by a trembling, half-coherent housemaid. The front door stood open, breathing candlelight onto the steps, while somewhere inside, a grandfather clock struck six reluctant chimes. In the library, Lord Pembroke reclined beneath shattered glass, his velvet smoking jacket darkened by blood and spilled burgundy everywhere. Only the portrait above him seemed unsurprised, its painted eyes fixed upon the fireplace where embers smoldered around charred paper. Vale removed his gloves slowly, noticing three teacups, one muddy footprint, and the widow's pearls scattered beneath the desk nearby. By sunrise, he knew the killer remained inside the manor, listening already for the first question nobody wished answered aloud.
created_at
"2026-03-09T22:41:13.781Z"
3/9/2026, 10:41:13 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
9629
moderation_latency
(null)
generation_time
10482
tokens_prompt
46
tokens_completion
379
native_tokens_prompt
41
native_tokens_completion
775
native_tokens_completion_images
0
native_tokens_reasoning
605
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
0.0117275
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_0ead3345ae31b2dc0169af4c89e27c819095314706bef121df"
is_byok
false
latency
235
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-1773096073-j5zFTRiqiZ2HKQXAQCvb"
upstream_id
"resp_0ead3345ae31b2dc0169af4c89e27c819095314706bef121df"
total_cost
0.0117275
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
6
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20