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Run: 2026-03-18-01KM07KARYESQ3P5VQWGGKRMFD
Run Details
Model:
GPT-5.4 Mini (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
13.9s
Cost:
$0.004436
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 silver threads across the manor windows as Inspector Vale arrived, carrying a lantern and the summons he dreaded. Inside, the ballroom glittered with abandoned champagne flutes, and the guests stood frozen around Lord Ashcroft's body beneath the chandelier. No one spoke when Vale noticed the bloodless smile, the missing watch, and the open French doors to the garden. A maid began to cry, then stopped abruptly, as if someone unseen had pressed a warning hand to her throat. Vale set his lantern beside the corpse and said, quietly, that the murderer was still in the house tonight, waiting.
created_at
"2026-03-18T10:24:26.921Z"
3/18/2026, 10:24:26 AM
model
"openai/gpt-5.4-mini-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
13427
moderation_latency
(null)
generation_time
13475
tokens_prompt
46
tokens_completion
798
native_tokens_prompt
41
native_tokens_completion
979
native_tokens_completion_images
0
native_tokens_reasoning
853
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
0.00443625
router
(null)
provider_responses
0
endpoint_id
"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id
"resp_0912133303323efa0169ba7d5af95c81908cab6b950e363cc5"
is_byok
false
latency
180
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-1773829466-zGe5WJc44CTBQZDyfN8j"
upstream_id
"resp_0912133303323efa0169ba7d5af95c81908cab6b950e363cc5"
total_cost
0.00443625
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