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Run: 2026-03-06-01KK1GDWWF84K9TBVMHWVCZ6D0
Run Details
Model:
GPT-5.4
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
4.8s
Cost:
$0.002352
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
65.92%
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 hammered Blackthorn Manor as guests arrived shivering, unaware that before dawn one among them would lie murdered upstairs. At supper, silver gleamed beneath candlelight while Lady Vale smiled too brightly, concealing dread behind practiced laughter and jeweled fingers. A telegram rested unopened beside her plate, its sender unnamed, its message heavy enough to silence every servant nearby. When the clock struck nine, the library doors swung open, and Colonel Ashcroft entered carrying mud, whiskey, and fear. No one noticed the missing portrait then, nor the faint red smear darkening the banister toward the locked east wing. Only the butler paused, listening hard, as something soft thudded overhead and the chandelier trembled above their wine.
created_at
"2026-03-06T12:02:18.646Z"
3/6/2026, 12:02:18 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
514
moderation_latency
(null)
generation_time
4740
tokens_prompt
46
tokens_completion
193
native_tokens_prompt
41
native_tokens_completion
150
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
0.0023525
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_05ea8e4496fe27210169aac24ab4c8819496214c4247eadcbb"
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-1772798538-QZkuoVSH0vwUxwBTOmLC"
upstream_id
"resp_05ea8e4496fe27210169aac24ab4c8819496214c4247eadcbb"
total_cost
0.0023525
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
65.92%
Matches word count
n/a
neededClean
false
sentences
6
wordCounts
0
19
1
20
2
19
3
19
4
20
5
18