NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-03-06-01KK1GQKJQ62AA5CX2S4MFP33H
Run Details
Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
5.0s
Cost:
$0.002278
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
97.41%
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 hammered Blackthorn Manor as mourners gathered beneath weeping eaves. Lady Haversham smiled faintly, though her husband lay upstairs dead. Candles guttered wildly, casting tall shadows across ancestral portraits tonight. Inspector Vale arrived late, carrying mud, silence, and suspicion. No one noticed the missing violin until midnight chimed once. In the library, brandy breathed oak while secrets sharpened quietly. Then Mrs. Finch screamed, dropping a bloodstained cufflink beside embers. Every guest turned slowly, as though rehearsing innocence for years. Vale knelt carefully, seeing ash, perfume, and one golden hair. Outside, thunder applauded softly while someone locked the garden door.
created_at
"2026-03-06T12:07:36.799Z"
3/6/2026, 12:07:36 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
434
moderation_latency
(null)
generation_time
4942
tokens_prompt
46
tokens_completion
183
native_tokens_prompt
41
native_tokens_completion
145
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
0.0022775
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_08f43d36d123219c0169aac388dc4c8196a299cb6eaf151149"
is_byok
false
latency
154
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-1772798856-PiIZW2ngYyjIOzJlLdGx"
upstream_id
"resp_08f43d36d123219c0169aac388dc4c8196a299cb6eaf151149"
total_cost
0.0022775
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
97.41%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
10
1
10
2
10
3
9
4
10
5
10
6
10
7
10
8
10
9
10