NC Bench
Overview
About
Tests
Models
Vendors
Run: 2026-02-20-01KHYADYXSHFFWVT9RH2N09R44
Run Details
Model:
Grok 4
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
21.6s
Cost:
$0.013062
Provider:
xAI
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
In the shadowy mansion, moonlight filtered through cracked stained glass. Detective Clara Thorne arrived, her boots echoing on marble floors. The butler bowed low, his face pale with unspoken dread. She followed him upstairs, sensing tension in the air. In the study, a body lay slumped over the desk. Blood stained the antique rug beneath the victim's chair. Clara knelt down, examining the wound with careful precision. A poisoned dagger rested nearby, gleaming under dim lamplight. Suspects gathered outside, whispering secrets in hushed, urgent tones. The mystery began unfolding, clues hidden in plain sight.
created_at
"2026-02-20T20:04:04.162Z"
2/20/2026, 8:04:04 PM
model
"x-ai/grok-4-07-09"
4/7/2009, 12:00:00 AM
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
17332
moderation_latency
(null)
generation_time
21584
tokens_prompt
46
tokens_completion
165
native_tokens_prompt
719
native_tokens_completion
829
native_tokens_completion_images
0
native_tokens_reasoning
701
native_tokens_cached
680
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
0.013062
router
(null)
provider_responses
0
endpoint_id
"d40bef9d-6936-4c57-9749-bf7399de4a77"
id
"a6583407-b6b2-d5e7-3a6e-6dad54f74c65"
is_byok
false
latency
65
model_permaslug
"x-ai/grok-4-07-09"
4/7/2009, 12:00:00 AM
provider_name
"xAI"
status
200
api_type
"completions"
id
"gen-1771617844-hux5zUuuvp1Och0jLdzA"
upstream_id
"a6583407-b6b2-d5e7-3a6e-6dad54f74c65"
total_cost
0.013062
cache_discount
0.00153
upstream_inference_cost
0
provider_name
"xAI"
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
10
5
9
6
9
7
9
8
9
9
9