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Run: 2026-03-18-01KM0A2N3E970DG41REX0T38D1
Run Details
Model:
GPT-5.4 Nano (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
4.5s
Cost:
$0.001103
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
The rain polished Marrowick Pier until lamplight shimmered like evidence, and everyone pretended not to notice the body there tonight. Captain Ellery Graves stood rigid, watching constables circle, while his niece insisted the scream came from inside the warehouse earlier. Detective Mara Voss arrived with a notebook, smelling of smoke, and asked who had keys to the dock shed first. Beneath the overturned boat, the victim wore a silver signet, yet no one recalled the owner before this storm began. Only Dr. Lorne Sable offered a timeline, claiming he treated Graves days ago for bruised hands at midnight quietly too. Mara lifted the signet carefully, noticing a fresh scratch shaped like a hook on slate beside the victim's cold thumb.
created_at
"2026-03-18T11:07:46.171Z"
3/18/2026, 11:07:46 AM
model
"openai/gpt-5.4-nano-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3931
moderation_latency
(null)
generation_time
4349
tokens_prompt
46
tokens_completion
192
native_tokens_prompt
41
native_tokens_completion
876
native_tokens_completion_images
0
native_tokens_reasoning
710
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
0.0011032
router
(null)
provider_responses
0
endpoint_id
"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id
"resp_07dc7a47f8f6ac0a0169ba8782405c81979484b8b03f7be5d5"
is_byok
false
latency
204
model_permaslug
"openai/gpt-5.4-nano-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-1773832066-URBv5ZooJoOXyRPaxC9Y"
upstream_id
"resp_07dc7a47f8f6ac0a0169ba8782405c81979484b8b03f7be5d5"
total_cost
0.0011032
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
6
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20