NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-03-18-01KM0AN249GE2A0S161NE7J15Z
Run Details
Model:
GPT-5.4 Nano
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
1.2s
Cost:
$0.000191
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
84.45%
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 Maren Vale arrived at Orchard House at midnight tonight. Inside, servants whispered, while rain tapped windows like nervous fingers. The body lay sprawled beneath the grand staircase, silent still. A silver pocketwatch gleamed near his lifeless, stiffened hand. Captain Rusk announced theft rumors, though evidence remained scarce. Maren noted mud on boots, matching tracks toward conservatory doors. Upstairs, a locked study smelled of roses and gunpowder. Guests gathered anxiously, claiming innocence, yet avoiding direct questions. Maren traced cobwebbed fingerprints across the banister carefully, slowly. Then she discovered a torn glove, bearing initials only.
created_at
"2026-03-18T11:17:49.333Z"
3/18/2026, 11:17:49 AM
model
"openai/gpt-5.4-nano-20260317"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
438
moderation_latency
(null)
generation_time
1086
tokens_prompt
46
tokens_completion
181
native_tokens_prompt
41
native_tokens_completion
146
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
0.0001907
router
(null)
provider_responses
0
endpoint_id
"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id
"resp_01f8f855014f40ca0169ba89dd63748196bf1e6bad5009553f"
is_byok
false
latency
179
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-1773832669-2WKpsHF4pQqlUq6t8fmF"
upstream_id
"resp_01f8f855014f40ca0169ba89dd63748196bf1e6bad5009553f"
total_cost
0.0001907
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
84.45%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
10
1
10
2
10
3
9
4
9
5
10
6
9
7
9
8
9
9
9