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Run: 2026-03-09-01KK9PT2KW2RSTPHXKXWD0AK89
Run Details
Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
18.0s
Cost:
$0.013782
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 polished the cobblestones outside Blackthorn Manor, where every window glowed except the library, dark as a sealed confession tonight. When Inspector Vale arrived, the butler stood barefoot in the foyer, holding a silver tray and trembling above it silently. On the tray lay a fountain pen, a bloodied cufflink, and a note reading, I knew you yesterday too well. Vale crossed the threshold and smelled gunpowder, lilies, and brandy, scents that clung together like conspirators sharing one breath tonight. The victim sat upright behind the mahogany desk, eyes open, throat dark, as if death had interrupted a verdict midword. Only the grandfather clock moved, dragging each second across the room while seven silent portraits watched the inspector begin listening.
created_at
"2026-03-09T16:27:44.646Z"
3/9/2026, 4:27:44 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
16530
moderation_latency
(null)
generation_time
17833
tokens_prompt
46
tokens_completion
199
native_tokens_prompt
41
native_tokens_completion
912
native_tokens_completion_images
0
native_tokens_reasoning
747
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
0.0137825
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_068a685f42a1dd1d0169aef500bebc81958292ab75deed56f1"
is_byok
false
latency
154
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-1773073664-hWtLWkli224hmvl4ka9e"
upstream_id
"resp_068a685f42a1dd1d0169aef500bebc81958292ab75deed56f1"
total_cost
0.0137825
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