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Run: 2026-03-18-01KM08RSBG3V86A2E3NVERFS6J
Run Details
Model:
GPT-5.4 Nano (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
13.5s
Cost:
$0.001274
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
At dawn, the ferry docked beside Marrowgate, where fog clung to lamplight and secrets waited beneath weathered planks all morning. Detective Lila Hart stepped from her coat, noticing lilies scattered in a spiral around the dead fisher by icehouse door. His eyes were filmed over, yet the tide line smelled sweet, like cloves, not salt from someone standing nearby yesterday. A clerk whispered that Marrowgate's mayor hosted last night's charity, then vanished after midnight without luggage into private carriage house. Lila crouched, reading a chalked symbol on his wrist: a broken compass, pointing nowhere while wind tugged receipts from pockets. When she asked for prints, the constable produced gloves stained violet, matching the lilies that reappeared, miraculously, after every rain. Tonight, she promised, the killer would speak through patterns, because Marrowgate kept accounting for every lie in ink, and silence.
created_at
"2026-03-18T10:44:54.27Z"
3/18/2026, 10:44:54 AM
model
"openai/gpt-5.4-nano-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
13203
moderation_latency
(null)
generation_time
13372
tokens_prompt
46
tokens_completion
808
native_tokens_prompt
41
native_tokens_completion
1013
native_tokens_completion_images
0
native_tokens_reasoning
811
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
0.00127445
router
(null)
provider_responses
0
endpoint_id
"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id
"resp_0bc6856e2da14c920169ba822651b08195bbe50dd634eb847d"
is_byok
false
latency
187
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-1773830694-Bg9HG8mGxJQdKlT8UlUZ"
upstream_id
"resp_0bc6856e2da14c920169ba822651b08195bbe50dd634eb847d"
total_cost
0.00127445
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
7
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20