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Run: 2026-03-18-01KM07XGT1K20401QSDSRGAJQB
Run Details
Model:
GPT-5.4 Mini (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
10.1s
Cost:
$0.006106
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 polished the manor windows as Inspector Vale stepped inside, where candlelight trembled over portraits and a spilled glass below. Mrs. Ashdown waited by the staircase, her pearl necklace broken, her voice too calm, and her hands stained with ash. No one mentioned the scream, though everyone had heard it, because the body in the library made silence necessary tonight. Vale knelt beside the desk, where a pocket watch ticked impossibly, and noticed muddy footprints leading toward the conservatory doors. Somewhere beyond the walls, thunder answered, and Inspector Vale realized the murderer was still in the house watching him now.
created_at
"2026-03-18T10:30:00.781Z"
3/18/2026, 10:30:00 AM
model
"openai/gpt-5.4-mini-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
9965
moderation_latency
(null)
generation_time
10025
tokens_prompt
46
tokens_completion
552
native_tokens_prompt
41
native_tokens_completion
1350
native_tokens_completion_images
0
native_tokens_reasoning
1220
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
0.00610575
router
(null)
provider_responses
0
endpoint_id
"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id
"resp_0f36502d45b29e810169ba7ea8d4f4819582a7adfb87181398"
is_byok
false
latency
159
model_permaslug
"openai/gpt-5.4-mini-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-1773829800-0sWRWIZzgy6AcTSDvHP0"
upstream_id
"resp_0f36502d45b29e810169ba7ea8d4f4819582a7adfb87181398"
total_cost
0.00610575
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
5
wordCounts
0
20
1
20
2
20
3
20
4
20