NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-03-18-01KM09MGJZV9H25D9BE2PGBTV2
Run Details
Model:
GPT-5.4 Nano
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
1.3s
Cost:
$0.000202
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
70.72%
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
Detective Mara Venn arrived at Harborlight after midnight, breathless and cautious. The pier lights flickered, casting shadows across the silent warehouse entrance. Inside, a body lay sprawled beside stacked crates, oddly uncovered. Detective Venn studied the wound, noting bruises shaped like rings. A stern inspector whispered that the victim wore gloves. Nearby, a spilled lantern oil glimmered, smelling sharply metallic. Captain Rourke insisted no one left, checking radios. Witnesses huddled outside, repeating names, times, and conflicting alibis. Mara requested the lockbox key, then examined the victim's watch. At last, it stopped at 12:07, precisely.
created_at
"2026-03-18T11:00:02.798Z"
3/18/2026, 11:00:02 AM
model
"openai/gpt-5.4-nano-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
505
moderation_latency
(null)
generation_time
861
tokens_prompt
46
tokens_completion
177
native_tokens_prompt
41
native_tokens_completion
155
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
0.00020195
router
(null)
provider_responses
0
endpoint_id
"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id
"resp_0c6c0820e32dd0280169ba85b2dfd48196a16e03d1d5c6cd81"
is_byok
false
latency
232
model_permaslug
"openai/gpt-5.4-nano-20260317"
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-1773831602-Vxwj4LxppebUyInSmyAT"
upstream_id
"resp_0c6c0820e32dd0280169ba85b2dfd48196a16e03d1d5c6cd81"
total_cost
0.00020195
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
70.72%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
11
1
11
2
10
3
10
4
9
5
9
6
8
7
9
8
10
9
7