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Run: 2026-03-18-01KM08XZ9VC23VKQ2W6NAPGV6Q
Run Details
Model:
GPT-5.4 Nano (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
9.0s
Cost:
$0.001162
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
Rain sheeted the manor windows as Inspector Hale arrived, noting the clock stopped exactly three minutes past midnight for him. In the foyer, Lady Marrow stood pale, while servants whispered about a scream from the east library before the storm. Carpet tracks led to a shattered portrait, and beneath it lay Anton Quill, still warm, strangely smiling with clasped hands. Hale knelt beside the body, smelling gunpowder on a fallen key, engraved with a stag crest from the study door. Across the hall, a music box clicked once, then fell silent, as if someone wanted witnesses gone without making noise. Lady Marrow insisted she heard nothing, yet her gloves bore fresh mud from the garden path where only servants walked.
created_at
"2026-03-18T10:47:44.202Z"
3/18/2026, 10:47:44 AM
model
"openai/gpt-5.4-nano-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
8655
moderation_latency
(null)
generation_time
8874
tokens_prompt
46
tokens_completion
287
native_tokens_prompt
41
native_tokens_completion
923
native_tokens_completion_images
0
native_tokens_reasoning
764
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
0.00116195
router
(null)
provider_responses
0
endpoint_id
"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id
"resp_0bb0ae956aefae330169ba82d043448195a767e9206790894f"
is_byok
false
latency
191
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-1773830864-SOvTdC48x3pzjS7blnCV"
upstream_id
"resp_0bb0ae956aefae330169ba82d043448195a767e9206790894f"
total_cost
0.00116195
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