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Run: 2026-03-09-01KK9Q3CQVZG7KB5QX6R1KQNTX
Run Details
Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
26.2s
Cost:
$0.025138
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 in black silk drifted through the foyer, pretending the storm outside mattered more. At half past ten, Lady Hargreave raised her glass, smiled at no one, and suddenly collapsed beside the grandfather clock. The violinist missed a note; then silence spread, cold and deliberate, as crimson threaded between the tiles beneath her slippers. Before anyone moved, the candles guttered, the doors slammed shut, and someone laughed softly from the unlit gallery above them. Inspector Vale, uninvited and inconveniently sober, stepped from pantry shadows, studying faces first and the sprawled corpse second that night. He bent once, touched the shattered stemware, and announced that the killer remained inside the room, listening in careful silence.
created_at
"2026-03-09T16:32:49.928Z"
3/9/2026, 4:32:49 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
25491
moderation_latency
(null)
generation_time
25623
tokens_prompt
46
tokens_completion
892
native_tokens_prompt
41
native_tokens_completion
1669
native_tokens_completion_images
0
native_tokens_reasoning
1509
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
0.0251375
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_0ecfc90b6bd316cf0169aef63200fc8195b3e3022a94029c5c"
is_byok
false
latency
185
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-1773073969-YrxfrigjHbUvmK7R53J3"
upstream_id
"resp_0ecfc90b6bd316cf0169aef63200fc8195b3e3022a94029c5c"
total_cost
0.0251375
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