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Run: 2026-03-18-01KM0ANWZXXDQ9GFBEW4VGS7SZ
Run Details
Model:
GPT-5.4 Nano (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
7.1s
Cost:
$0.001299
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 dusk, Detective Mara Quinn entered Blackwood Manor, where rain tapped windows like fingers on glass for her weary investigation. Inside, the housekeeper whispered that Lord Harren lay dead upstairs, and the butler barred every corridor with silent, shaking hands. Mara climbed the stairs, noting overturned chairs below, and a faint scent of lilac clinging to wallpaper near landing door. In the study, Harren's eyes stared wide, while a silver candlestick cooled beside a broken clock stopped exactly at midnight. Four guests stood behind her, arguing softly over alibis, each refusing to meet her gaze beneath portraits drenched in candlelight. Mara opened her notebook, promising justice, then asked who had served the final brandy to Harren before lights went out.
created_at
"2026-03-18T11:18:16.84Z"
3/18/2026, 11:18:16 AM
model
"openai/gpt-5.4-nano-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
6816
moderation_latency
(null)
generation_time
6976
tokens_prompt
46
tokens_completion
317
native_tokens_prompt
41
native_tokens_completion
1033
native_tokens_completion_images
0
native_tokens_reasoning
866
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
0.00129945
router
(null)
provider_responses
0
endpoint_id
"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id
"resp_008c2e4c86a9e6bf0169ba89f8e6788196811a9ba8389e80f5"
is_byok
false
latency
163
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-1773832696-NgHZ11yJpdq7g5Ou27qa"
upstream_id
"resp_008c2e4c86a9e6bf0169ba89f8e6788196811a9ba8389e80f5"
total_cost
0.00129945
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