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Run: 2026-03-18-01KM08ESTJMK716J16MMD7PB5A
Run Details
Model:
GPT-5.4 Mini (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
6.7s
Cost:
$0.002456
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 manor's windows as Eleanor arrived, clutching the letter that had summoned her to Blackthorn House at midnight. Inside, candles trembled along the corridor, and the servants stood silent, their eyes lowered, as if expecting someone already dead. At the stair's base, Sir Malcolm lay sprawled beneath the shattered clock, his gloved hand still gripping a silver key. Eleanor heard the house breathe around her, and when the front door slammed, she realized the killer had just returned.
created_at
"2026-03-18T10:39:27.071Z"
3/18/2026, 10:39:27 AM
model
"openai/gpt-5.4-mini-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
6209
moderation_latency
(null)
generation_time
6362
tokens_prompt
46
tokens_completion
399
native_tokens_prompt
41
native_tokens_completion
539
native_tokens_completion_images
0
native_tokens_reasoning
432
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
0.00245625
router
(null)
provider_responses
0
endpoint_id
"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id
"resp_0d332ca07ea4484c0169ba80df21148190849433b9fef3024f"
is_byok
false
latency
205
model_permaslug
"openai/gpt-5.4-mini-20260317"
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-1773830367-yAfzhLYxiT7LUVK0Abeq"
upstream_id
"resp_0d332ca07ea4484c0169ba80df21148190849433b9fef3024f"
total_cost
0.00245625
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
4
wordCounts
0
20
1
20
2
20
3
20