Run: 2026-02-20-01KHY9KFGGJ5XZWB89PQKFD9WM

Run Details

Model:
Grok 4
Duration:
14.4s
Cost:
$0.006122
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
80.33% 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

AI
The fog-shrouded mansion loomed ominously on the hill, its ancient windows staring like unblinking eyes into the stormy night ahead. Detective Eliza Thorne arrived at midnight, her trench coat dripping rain as she stepped over the creaking threshold into darkness. Inside, the air hung heavy with secrets, and a faint metallic scent hinted at violence lurking in the shadows. She followed the butler down a dimly lit hallway, where portraits of stern ancestors seemed to watch her every move closely. Suddenly, a piercing scream echoed from the study, shattering the silence and sending chills racing down her spine immediately. Rushing forward, Eliza burst through the door to find Lord Harrington slumped lifeless in his leather armchair by the fire. Blood pooled on the antique rug beneath him, staining the intricate patterns with a gruesome, irreversible mark of foul play. A cryptic note clutched in his cold hand read mysterious words that promised to unravel a web of deceit soon. Eliza knelt to examine the scene, her keen eyes spotting a misplaced dagger glinting under the flickering candlelight nearby. As thunder roared outside, she knew this murder would test her skills against a clever killer hiding in plain sight.
created_at"2026-02-20T19:49:36.412Z" 2/20/2026, 7:49:36 PM
model"x-ai/grok-4-07-09" 4/7/2009, 12:00:00 AM
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5175
moderation_latency(null)
generation_time14256
tokens_prompt46
tokens_completion308
native_tokens_prompt719
native_tokens_completion372
native_tokens_completion_images0
native_tokens_reasoning141
native_tokens_cached718
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"
usage0.0061215
router(null)
provider_responses
0
endpoint_id"d40bef9d-6936-4c57-9749-bf7399de4a77"
id"670a8457-5aed-9e31-6a81-d7521dd44035"
is_byokfalse
latency81
model_permaslug"x-ai/grok-4-07-09" 4/7/2009, 12:00:00 AM
provider_name"xAI"
status200
api_type"completions"
id"gen-1771616976-jcWnXJeQF5qjBMRkNxNb"
upstream_id"670a8457-5aed-9e31-6a81-d7521dd44035"
total_cost0.0061215
cache_discount0.0016155
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
80.33% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
021
120
219
321
419
520
620
720
819
920