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Run: 2026-03-06-01KK1HC4PXP51EPVJCZW2EQEQY
Run Details
Model:
GPT-5.4
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
4.8s
Cost:
$0.002203
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
89.63%
Matches word count
(details)
Model input
User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain glazed Blackthorn Manor as mourners gathered beneath iron lanterns. Lady Vale arrived late, her veil snagged on bramble thorns. Inside, the grandfather clock coughed midnight, though supper had ended. A violin whispered upstairs, where no musician had slept. Servants exchanged glances, then lowered eyes toward polished floorboards. Detective Rowan Pike noticed mud staining the marble foyer. No carriage should have crossed the washed-out eastern bridge tonight. Then Aunt Eugenia screamed, dropping her silver gospel onto tiles. In the library, Lord Halberd slumped beside extinguished embers, lifeless. A chess king rested inside his open, bloodless hand.
created_at
"2026-03-06T12:18:49.701Z"
3/6/2026, 12:18:49 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
527
moderation_latency
(null)
generation_time
4740
tokens_prompt
46
tokens_completion
173
native_tokens_prompt
41
native_tokens_completion
140
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
0.0022025
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_0f8507d6fcaf37c70169aac629c7a08196b1d435759712bbee"
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-1772799529-66knbP963Or8FnEVqs7g"
upstream_id
"resp_0f8507d6fcaf37c70169aac629c7a08196b1d435759712bbee"
total_cost
0.0022025
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
89.63%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
10
1
10
2
10
3
9
4
9
5
9
6
10
7
10
8
10
9
9