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Run: 2026-03-06-01KK1J425JJ76K4GP37X6Z884X
Run Details
Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
3.2s
Cost:
$0.001618
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
58.71%
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
By midnight, Blackthorn Manor crouched beneath freezing rain, its windows glowing like watchful eyes above the cliffs and crashing sea. Inside, twelve guests circled the fire in practiced laughter, while somewhere upstairs, a clock ticked with dreadful insistence. Lady Corven raised her glass for a toast, but the lights failed suddenly, drowning the room in startled silence. When brightness returned, her body lay across the Persian rug, crimson spreading outward, and every smiling face had changed.
created_at
"2026-03-06T12:31:53.53Z"
3/6/2026, 12:31:53 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
428
moderation_latency
(null)
generation_time
3141
tokens_prompt
46
tokens_completion
128
native_tokens_prompt
41
native_tokens_completion
101
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
0.0016175
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_0ec238242d5e46810169aac93995208197b642ade43bcf441c"
is_byok
false
latency
261
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-1772800313-NQxF2UYgyR8TCKDqDjkC"
upstream_id
"resp_0ec238242d5e46810169aac93995208197b642ade43bcf441c"
total_cost
0.0016175
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
58.71%
Matches word count
n/a
neededClean
false
sentences
4
wordCounts
0
20
1
18
2
19
3
19