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Run: 2026-03-09-01KK9QDP3AENH396EB25PPBV4D
Run Details
Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
27.8s
Cost:
$0.025077
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 worried the stained windows of Blackthorn Manor as Inspector Vale arrived, hat dripping, and found every curtain tightly drawn. In the candlelit hall, seven guests watched the grandfather clock shudder toward midnight while thunder covered a woman's strangled cry. Vale followed the sound into the library, where Lord Ashcombe lay beside the hearth, silver opener lodged beneath his breastbone. No window stood open, no servant had entered, and the only key rested calmly in the dead man's pocket tonight. On the mantel, beneath a smiling family portrait, melted wax pinned a single black rose to yesterday's evening invitation card. Vale removed his gloves, studied the unmoving faces, and knew the storm outside was kinder than anyone remaining inside tonight.
created_at
"2026-03-09T16:38:27.188Z"
3/9/2026, 4:38:27 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
26549
moderation_latency
(null)
generation_time
27640
tokens_prompt
46
tokens_completion
435
native_tokens_prompt
41
native_tokens_completion
1665
native_tokens_completion_images
0
native_tokens_reasoning
1514
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
0.0250775
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_0b7e2c054c4485a00169aef7835cc0819092ffff7e64515551"
is_byok
false
latency
319
model_permaslug
"openai/gpt-5.4-20260305"
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-1773074307-rMkPxPB6GF1shXcQpwrW"
upstream_id
"resp_0b7e2c054c4485a00169aef7835cc0819092ffff7e64515551"
total_cost
0.0250775
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