Run: 2026-02-20-01KHY8C7MH2102V6JW5VRDP1CQ

Run Details

Model:
Grok 4
Duration:
15.3s
Cost:
$0.008911
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
55.16% 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 manor loomed on the hilltop, its ancient stone walls whispering secrets of long-forgotten scandals and hidden betrayals. Detective Elena Voss approached the wrought-iron gates, her trench coat billowing in the chill autumn wind that carried distant thunder. Inside, candlelight flickered in the grand hall, casting eerie shadows on portraits of stern ancestors staring down accusingly. A butler with trembling hands opened the heavy oak door, his face pale as if he'd seen a ghost. Elena stepped into the opulent drawing room, where guests in formal attire murmured nervously around a velvet-draped table. Suddenly, a scream pierced the tension, echoing from the upstairs library where the wealthy host was expected to appear. Rushing up the spiral staircase, Elena found the door ajar, revealing a scene of chaos and spilled crimson blood. The host lay motionless on the Persian rug, a antique dagger protruding from his chest, his eyes frozen in terror. Clues scattered like puzzle pieces: a torn letter, a shattered vase, and footprints leading to the open window. Elena knelt to examine the body, knowing this murder would unravel a web of lies among the assembled suspects.
created_at"2026-02-20T19:28:10.397Z" 2/20/2026, 7:28:10 PM
model"x-ai/grok-4-07-09" 4/7/2009, 12:00:00 AM
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency8610
moderation_latency(null)
generation_time15244
tokens_prompt46
tokens_completion315
native_tokens_prompt719
native_tokens_completion558
native_tokens_completion_images0
native_tokens_reasoning322
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"
usage0.0089115
router(null)
provider_responses
0
endpoint_id"d40bef9d-6936-4c57-9749-bf7399de4a77"
id"805035db-bd28-79bd-984b-ecd59a41eb88"
is_byokfalse
latency1557
model_permaslug"x-ai/grok-4-07-09" 4/7/2009, 12:00:00 AM
provider_name"xAI"
status200
api_type"completions"
id"gen-1771615690-u7v7OQGgW90ybsRDC71W"
upstream_id"805035db-bd28-79bd-984b-ecd59a41eb88"
total_cost0.0089115
cache_discount0.0016155
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
55.16% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
021
121
218
319
419
519
619
720
818
919