NC Bench
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Run: 2026-02-20-01KHYB0ZE752VT5E43SYSNCG41
Run Details
Model:
Grok 4
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
17.3s
Cost:
$0.008969
Provider:
xAI
Evaluation summary
Score
Evaluator
Details Link
76.39%
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
In the shadowy depths of the ancient manor house, a piercing scream shattered the silence of the stormy midnight hour. Detective Eliza Thorne arrived swiftly at the scene, her keen eyes scanning the opulent room for any subtle clues. The victim, a wealthy industrialist named Victor Blackwood, lay sprawled on the Persian rug with a dagger in his chest. Gathered suspects whispered nervously among themselves, each one hiding secrets that could unravel the web of deceit and betrayal. Outside, thunder rumbled ominously as rain pelted the windows, setting the stage for a night of revelations and danger.
created_at
"2026-02-20T20:14:27.281Z"
2/20/2026, 8:14:27 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
13009
moderation_latency
(null)
generation_time
17232
tokens_prompt
46
tokens_completion
158
native_tokens_prompt
719
native_tokens_completion
556
native_tokens_completion_images
0
native_tokens_reasoning
437
native_tokens_cached
679
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
0.00896925
router
(null)
provider_responses
0
endpoint_id
"d40bef9d-6936-4c57-9749-bf7399de4a77"
id
"8be7d67b-9617-dfd8-af27-246a68f5e7da"
is_byok
false
latency
421
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-1771618467-wdvLW2hXi8ryWkFbdfWf"
upstream_id
"8be7d67b-9617-dfd8-af27-246a68f5e7da"
total_cost
0.00896925
cache_discount
0.00152775
upstream_inference_cost
0
provider_name
"xAI"
Evaluation details
Result
Evaluator
Details
Meta Data
76.39%
Matches word count
n/a
neededClean
false
sentences
5
wordCounts
0
20
1
19
2
20
3
19
4
19