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Run: 2026-03-09-01KKAC2BDXA49S4E29556CHCY2
Run Details
Model:
GPT-5.4 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
8.2s
Cost:
$0.009132
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 worried the stained windows of Blackthorn Hall as guests gathered beneath chandeliers, pretending the storm outside was merely atmospheric. At the stroke of eleven, Lady Winterrose raised her glass, smiling too brightly, while the butler locked every door himself. No one noticed the violinist stop playing until a single scream severed the toast and sent crystal trembling on tables. Lady Winterrose lay across the Persian carpet, throat opened neatly, her ruby necklace broken like punctuation marking some terrible secret. Inspector Vale, arriving late and soaked through, removed his gloves, surveyed the silent room, and asked who had left first.
created_at
"2026-03-09T22:39:15.911Z"
3/9/2026, 10:39:15 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
7436
moderation_latency
(null)
generation_time
8111
tokens_prompt
46
tokens_completion
167
native_tokens_prompt
41
native_tokens_completion
602
native_tokens_completion_images
0
native_tokens_reasoning
474
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
0.0091325
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_0beae1f9dac932f80169af4c13fb508196b9749f056d65ab93"
is_byok
false
latency
212
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-1773095955-DFSmqUXCqDaazEcYuwKv"
upstream_id
"resp_0beae1f9dac932f80169af4c13fb508196b9749f056d65ab93"
total_cost
0.0091325
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
5
wordCounts
0
20
1
20
2
20
3
20
4
20