NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-03-06-01KK1HKTJKVDZ4Y8SNJ6M60CN8
Run Details
Model:
GPT-5.4
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
4.4s
Cost:
$0.002083
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 clawed the stained windows of Blackthorn Hall as guests gathered silently, pretending civility while old grudges sharpened behind smiles. At the stroke of eight, Lady Wren descended the staircase glittering in emerald silk, her diamond necklace resting above secrets. No one noticed the missing portrait until thunder cracked overhead, and the candles guttered low, smearing every face with dread. Then came the scream from the library, raw and brief, followed by silence so complete even the storm paused outside. When they forced the door, Lord Ashcombe lay across the hearthrug, eyes open, throat dark, one hand clutching torn velvet.
created_at
"2026-03-06T12:23:01.466Z"
3/6/2026, 12:23:01 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
511
moderation_latency
(null)
generation_time
4376
tokens_prompt
46
tokens_completion
164
native_tokens_prompt
41
native_tokens_completion
132
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
0.0020825
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_0ec8ed0bd1eb27dd0169aac7258cd881939e25fb95d1ffeb72"
is_byok
false
latency
240
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-1772799781-srXzjz09YGSS4DcQBQXF"
upstream_id
"resp_0ec8ed0bd1eb27dd0169aac7258cd881939e25fb95d1ffeb72"
total_cost
0.0020825
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
5
wordCounts
0
20
1
20
2
20
3
20
4
20