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Run: 2026-03-06-01KK1GBF5VSMJA7KCQDXRC3FZR
Run Details
Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
4.9s
Cost:
$0.002247
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
94.82%
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 glazed Blackthorn Hall as mourners gathered beneath weeping eaves. Lady Wren arrived late, her gloves damp, expression carefully unreadable. Inside, candles trembled, casting long shadows across ancestral portraits. The butler announced dinner, though no one admitted feeling hungry. At table's head sat Sir Alistair, pale, silent, and rigid. His wine remained untouched, dark as the storm outside tonight. When thunder struck, Lady Wren noticed blood beneath his cuff. No one screamed immediately; shock settled first, cold and deliberate. Then Sir Alistair toppled sideways, dead before silver touched floor. Somewhere above, a door clicked shut with practiced gentleness.
created_at
"2026-03-06T12:00:59.074Z"
3/6/2026, 12:00:59 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
421
moderation_latency
(null)
generation_time
4820
tokens_prompt
46
tokens_completion
178
native_tokens_prompt
41
native_tokens_completion
143
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
0.0022475
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_0e4d46f4b89abaec0169aac1fb21ac819091bb52327defba8b"
is_byok
false
latency
134
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-1772798459-G1MobJtaqQog8gn3XmEb"
upstream_id
"resp_0e4d46f4b89abaec0169aac1fb21ac819091bb52327defba8b"
total_cost
0.0022475
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
94.82%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
10
1
10
2
9
3
10
4
10
5
10
6
10
7
10
8
10
9
9