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Run: 2026-03-18-01KM0AMAS59K7Z9NTC0J62PEYV
Run Details
Model:
GPT-5.4 Nano (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
6.1s
Cost:
$0.000806
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain tapped the manor windows as the orchestra finished tuning. Detective Mara Voss arrived, coat dripping, to question the host. In the foyer, candles flickered beside a shattered grandfather clock. Sir Alden claimed the victim vanished during the final toast. Guests murmured, clutching programs printed with the late magistrate's seal. Then, beneath portraits, a scream rose and echoed silently tonight. Mara followed footsteps to the library, where silence waited patiently. The body lay sprawled, ink-stained fingers still gripping a key. A single rose rested near his chest, freshly broken stem. Mara noticed the clock's hands stopped exactly at midnight forever.
created_at
"2026-03-18T11:17:25.426Z"
3/18/2026, 11:17:25 AM
model
"openai/gpt-5.4-nano-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
5856
moderation_latency
(null)
generation_time
6003
tokens_prompt
46
tokens_completion
433
native_tokens_prompt
41
native_tokens_completion
638
native_tokens_completion_images
0
native_tokens_reasoning
490
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
0.0008057
router
(null)
provider_responses
0
endpoint_id
"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id
"resp_09137f1dfa181a750169ba89c57d9c8195a0d785525989e5b6"
is_byok
false
latency
241
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-1773832645-Vt4AOHEtq1iGBddDVyeC"
upstream_id
"resp_09137f1dfa181a750169ba89c57d9c8195a0d785525989e5b6"
total_cost
0.0008057
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
10
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10