NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-03-09-01KK9Q5RNE7ZVY2FB85C1TDBEZ
Run Details
Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
14.7s
Cost:
$0.009343
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 worried the mansion windows as midnight swallowed the valley. Inside, silver candlesticks trembled beside portraits with watchful, dustless eyes. Guests whispered politely, hiding grudges beneath champagne smiles and silk. Then the clock groaned once, and Lady Harrow screamed upstairs. We found Sir Alistair sprawled inside his locked study doorway. A chess king gleamed blackly in his stiffening, open hand. On the carpet, melted ice traced a stranger's careful route. Before dawn arrived, every soul there possessed motive, means, fear.
created_at
"2026-03-09T16:34:07.677Z"
3/9/2026, 4:34:07 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
14348
moderation_latency
(null)
generation_time
14421
tokens_prompt
46
tokens_completion
451
native_tokens_prompt
41
native_tokens_completion
616
native_tokens_completion_images
0
native_tokens_reasoning
498
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
0.0093425
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_05766cd3455892190169aef67fd3ec8190a575703275b178c1"
is_byok
false
latency
222
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-1773074047-IDJZ6psTryIVAh41ozLm"
upstream_id
"resp_05766cd3455892190169aef67fd3ec8190a575703275b178c1"
total_cost
0.0093425
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
8
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10