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Run: 2026-03-18-01KM08HYM0ED4WAGKXEBND94FK
Run Details
Model:
GPT-5.4 Nano
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
1.2s
Cost:
$0.000194
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
92.22%
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
Detective Mara Voss arrived at Larkspur Manor before sunrise. A silence hung among gardens, yet alarms had already sounded. Wealthy patrons gathered, whispering, while servants avoided direct eye contact. The victim, Sir Edwin Harrow, lay motionless beside fountains. I noted a perfume trail, interrupted abruptly near his pocket watch. Rain began softly, masking footprints that circled the locked pavilion. Mara examined his hands, finding sand and dark wax residue. From within, a violin melody played without any visible musician. The housekeeper trembled, insisting someone entered through the portrait gallery. Mara requested names, while the butler produced a trembling alibi.
created_at
"2026-03-18T10:41:10.287Z"
3/18/2026, 10:41:10 AM
model
"openai/gpt-5.4-nano-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
472
moderation_latency
(null)
generation_time
1110
tokens_prompt
46
tokens_completion
182
native_tokens_prompt
41
native_tokens_completion
149
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
0.00019445
router
(null)
provider_responses
0
endpoint_id
"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id
"resp_0b51452696d126bd0169ba814656c08193b2a86b93563dbbde"
is_byok
false
latency
201
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-1773830470-gRCmYjS75FdJMCbiQlQ5"
upstream_id
"resp_0b51452696d126bd0169ba814656c08193b2a86b93563dbbde"
total_cost
0.00019445
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
92.22%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
9
1
10
2
10
3
9
4
11
5
10
6
10
7
10
8
10
9
10