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Run: 2026-03-06-01KK1H3RH1C7KZWSFP8E358NYA
Run Details
Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
5.3s
Cost:
$0.002142
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 polished Blackthorn Manor while mourners gathered beneath lowering clouds. Inside, grandfather clocks counted silences between whispers and clinking glasses. Lady Vale welcomed everyone warmly, though her smile never reached. At dinner, candles trembled whenever the locked library door rattled. Professor Wren joked about ghosts, then spilled wine across maps. No one laughed when the butler announced midnight had arrived. A scream sliced upward from the cellar, sharp as winter. They found Jasper Crowe crumpled beside barrels, throat neatly opened. In his stiffening hand rested Lady Vale's missing emerald brooch. Above them, the clocks resumed ticking, patient as hidden witnesses.
created_at
"2026-03-06T12:14:15.081Z"
3/6/2026, 12:14:15 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
505
moderation_latency
(null)
generation_time
5231
tokens_prompt
46
tokens_completion
180
native_tokens_prompt
41
native_tokens_completion
136
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
0.0021425
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_0e0e7421bf7735900169aac5172750819585fca0b16721c874"
is_byok
false
latency
186
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-1772799255-SLhguTyFWHukD0LvgkK0"
upstream_id
"resp_0e0e7421bf7735900169aac5172750819585fca0b16721c874"
total_cost
0.0021425
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
10
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10