Run: 2026-02-20-01KHY7PB4NWKWF3PA30J0E4RVZ

Run Details

Model:
Grok 4.1 Fast
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
6.2s
Cost:
$0.000315
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
91.15% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain lashed the creaking mansion windows. Lightning cracked the midnight sky open. Scream echoed through the shadowed halls. Butler found the master lifeless. Blood stained the Persian rug red. Knife gleamed beside the corpse. Guests froze in the parlor. Footsteps hurried down the stairs. Detective arrived in driving rain. Body chilled the moonlit room.
created_at"2026-02-20T19:16:13.09Z" 2/20/2026, 7:16:13 PM
model"x-ai/grok-4.1-fast"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency854
moderation_latency(null)
generation_time5997
tokens_prompt46
tokens_completion229
native_tokens_prompt191
native_tokens_completion598
native_tokens_completion_images0
native_tokens_reasoning518
native_tokens_cached151
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.00031455
router(null)
provider_responses
0
endpoint_id"9821aa0e-dce3-4c27-9716-161359123d0b"
id"34a823f6-0d92-0518-2467-58fe531a9324"
is_byokfalse
latency631
model_permaslug"x-ai/grok-4.1-fast"
provider_name"xAI"
status200
api_type"completions"
id"gen-1771614973-Nuzi6lvS7o4HqgGVJzo5"
upstream_id"34a823f6-0d92-0518-2467-58fe531a9324"
total_cost0.00031455
cache_discount0.00002265
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
91.15% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
06
16
26
35
46
55
65
75
85
95