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Run: 2026-03-18-01KM09SM5EKH8S5F9A9VR2KQ0V
Run Details
Model:
GPT-5.4 Nano
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
1.9s
Cost:
$0.000186
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
84.45%
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
Midnight fell; rain tapped the manor windows like impatient fingers. Detective Lorna Vale arrived, hearing screams from the sealed library. Lady Hartwell lay still beside the shattered grandfather clock. Candles burned low, yet the room smelled faintly scorched. Guests whispered, claiming thunder struck, though no storms approached. The butler swore innocence, clutching keys to every door. On the floor, a torn note bore a single initial. Lorna examined ash smudges, finding no match among household records. The housekeeper cried, insisting her son vanished hours earlier. Outside, a carriage departed silently, leaving mud trails behind.
created_at
"2026-03-18T11:02:50.297Z"
3/18/2026, 11:02:50 AM
model
"openai/gpt-5.4-nano-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1110
moderation_latency
(null)
generation_time
1812
tokens_prompt
46
tokens_completion
172
native_tokens_prompt
41
native_tokens_completion
142
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
0.0001857
router
(null)
provider_responses
0
endpoint_id
"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id
"resp_00608cffceda86da0169ba865a5bfc8194924ee15291589efd"
is_byok
false
latency
217
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-1773831770-3WwfCjjJmt1QWVP0smB9"
upstream_id
"resp_00608cffceda86da0169ba865a5bfc8194924ee15291589efd"
total_cost
0.0001857
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
84.45%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
10
1
10
2
9
3
9
4
9
5
9
6
10
7
10
8
9
9
9