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Run: 2026-03-06-01KK1H30S6C9GQBE8KJYSM5E9K
Run Details
Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
3.8s
Cost:
$0.001618
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
70.49%
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 needled the manor windows as guests gathered beneath chandeliers, pretending warmth while portraits watched from walls darkened by age. At precisely midnight, the clock groaned twelve times, and Lady Wren collapsed beside the grand piano, pearls scattering everywhere. No one screamed at first; they only stared, hearing the final note still trembling beneath the storm's relentless drumming. Then Colonel Vale locked the doors himself, declaring the killer remained among them, smiling politely while hiding bloodied hands.
created_at
"2026-03-06T12:13:50.765Z"
3/6/2026, 12:13:50 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
401
moderation_latency
(null)
generation_time
3741
tokens_prompt
46
tokens_completion
135
native_tokens_prompt
41
native_tokens_completion
101
native_tokens_completion_images
0
native_tokens_reasoning
0
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
0.0016175
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_088723fa02a0c30a0169aac4fed6fc8194a924ad80ca320bef"
is_byok
false
latency
144
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-1772799230-vnmsGhAQ1M6cCfbA8YTS"
upstream_id
"resp_088723fa02a0c30a0169aac4fed6fc8194a924ad80ca320bef"
total_cost
0.0016175
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
70.49%
Matches word count
n/a
neededClean
false
sentences
4
wordCounts
0
20
1
19
2
19
3
19