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Run: 2026-03-18-01KM0ARY6MKC1XRDP00201C873
Run Details
Model:
GPT-5.4 Nano
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
2.0s
Cost:
$0.000199
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
3.18%
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
The clock tower chimed midnight as rain polished cobblestones outside Marrowick Manor, where guests waited anxiously inside. Detective Elara Voss arrived quietly, carrying a notebook, while butler Finch watched every shadow with practiced suspicion. On the drawing-room rug lay Sir Alistair, face pale, eyes open, and a silver letter-opener clenched tightly. The housekeeper screamed once, then trembled; Doctor Halden declared him dead, yet offered no clear cause immediately. Guests gathered in uneasy circles, arguing over keys, wagers, and who last saw the victim before dinner. A single footprint, muddy and fresh, led from the library, stopping beside the window latch, untouched by cleaning.
created_at
"2026-03-18T11:19:56.384Z"
3/18/2026, 11:19:56 AM
model
"openai/gpt-5.4-nano-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1135
moderation_latency
(null)
generation_time
1555
tokens_prompt
46
tokens_completion
181
native_tokens_prompt
41
native_tokens_completion
153
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
0.00019945
router
(null)
provider_responses
0
endpoint_id
"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id
"resp_07611454781baabc0169ba8a5c755081938bb0a1b366b5d992"
is_byok
false
latency
214
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-1773832796-q7cIB1HSF2MZIxCvwvRg"
upstream_id
"resp_07611454781baabc0169ba8a5c755081938bb0a1b366b5d992"
total_cost
0.00019945
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
3.18%
Matches word count
n/a
neededClean
false
sentences
6
wordCounts
0
17
1
17
2
17
3
17
4
17
5
18