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Run: 2026-03-18-01KM079AMEC1YNEG3ZC55MD13N
Run Details
Model:
GPT-5.4 Mini (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
11.6s
Cost:
$0.007388
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 stitched the manor windows as Inspector Vale arrived, carrying the kind of silence that makes servants stop breathing instantly. Inside the grand hall smelled of wax, wet wool, and something sharper, while a violin played from the dark above. At the staircase, Lady Merrow lay crumpled beneath the chandelier, her pearl necklace snapped, her gloves arranged like evidence already. No one had touched the body, the butler insisted, yet Vale noticed muddy footprints circling it, patient and deliberate too. When he lifted the fallen hand, he found a chess piece clutched in the dead woman's fist, black as sin.
created_at
"2026-03-18T10:18:59.291Z"
3/18/2026, 10:18:59 AM
model
"openai/gpt-5.4-mini-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
10841
moderation_latency
(null)
generation_time
10930
tokens_prompt
46
tokens_completion
537
native_tokens_prompt
41
native_tokens_completion
1635
native_tokens_completion_images
0
native_tokens_reasoning
1505
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
0.00738825
router
(null)
provider_responses
0
endpoint_id
"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id
"resp_08a58a7498378d8c0169ba7c13a5f08197a96292ce2b241ea7"
is_byok
false
latency
246
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-1773829139-7ghcJ8Cnm7jZWq01zPos"
upstream_id
"resp_08a58a7498378d8c0169ba7c13a5f08197a96292ce2b241ea7"
total_cost
0.00738825
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