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Run: 2026-03-09-01KK9QHWBDFFHAAFG8TXP0X94M
Run Details
Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
2m 17s
Cost:
$0.010767
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain stitched silver needles through Blackmere Hall before dawn arrived. Inside, grandfather clocks argued softly while portraits watched the corridors. Mara Finch unlocked the library and smelled oranges, smoke, fear. A fire guttered low, illuminating boots protruding beyond the desk. She stepped closer, hearing china tremble somewhere above her head. Lord Wren lay crumpled, one cuff soaked darkly, throat open. On the carpet, chess pieces formed a broken white circle. The window stood unlatched, yet rain touched nothing indoors whatsoever. Then the telephone rang once, and everyone downstairs began lying.
created_at
"2026-03-09T16:42:46.443Z"
3/9/2026, 4:42:46 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
14435
moderation_latency
(null)
generation_time
14573
tokens_prompt
46
tokens_completion
422
native_tokens_prompt
41
native_tokens_completion
711
native_tokens_completion_images
0
native_tokens_reasoning
585
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
0.0107675
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_0e220d03b4eac7ae0169aef88685cc8196a9229ca731c58707"
is_byok
false
latency
221
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-1773074566-eP47YZtPNWEM857mPoOg"
upstream_id
"resp_0e220d03b4eac7ae0169aef88685cc8196a9229ca731c58707"
total_cost
0.0107675
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
9
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10