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Run: 2026-03-09-01KK9QPXBHXKA4E3AMHTFFBR6F
Run Details
Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
13.8s
Cost:
$0.013152
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 10 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 Blackthorn Manor's darkened windows tonight. Inside, the grandfather clock coughed midnight into the silent hall. Evelyn Hart removed one glove, noticing blood beneath her fingernails. Nobody else had seen the library door swing open slowly. Yet everyone heard the scream, sharp as crystal shattering upstairs. When she entered, Lord Ashcombe lay smiling beside extinguished candles. A chess king rested in his mouth like accusation itself. On the mantel, six portraits watched; one pair seemed alive. Evelyn knew then the murderer remained inside the manor still.
created_at
"2026-03-09T16:43:29.536Z"
3/9/2026, 4:43:29 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
13488
moderation_latency
(null)
generation_time
13687
tokens_prompt
46
tokens_completion
552
native_tokens_prompt
41
native_tokens_completion
870
native_tokens_completion_images
0
native_tokens_reasoning
745
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
0.0131525
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_04c544f910b0ac8d0169aef8b19d7c8197b1caa8608b1f51e1"
is_byok
false
latency
175
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-1773074609-FrPFBGVJ8gec2uDUiobw"
upstream_id
"resp_04c544f910b0ac8d0169aef8b19d7c8197b1caa8608b1f51e1"
total_cost
0.0131525
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
9
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10