Run: 2026-02-20-01KHYB818MWRWDSYNQY42P1BD9

Run Details

Duration:
12.5s
Cost:
$0.001075
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
0.68% 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
Thick fog enveloped the long winding driveway that led to the grand Blackwood estate where guests arrived. Elegant cars pulled up one by one as attendees in formal attire stepped out cautiously into mist. Inside the opulent ballroom of Blackwood Manor, crystal chandeliers sparkled brightly above the laughing crowd mingling freely. Champagne flutes clinked merrily in gloved hands while whispers of inheritance buzzed among the gathered aristocrats tonight. A blood-curdling scream suddenly pierced the festive air echoing loudly from the upstairs master bedroom suite. Guests froze in utter shock before rushing chaotically up the grand marble staircase to investigate hurriedly. They burst into the bedroom door and found the host lying lifeless on the Persian rug. A single silver dagger protruded from his chest amid shattered glass from the broken window nearby. Whispers of murder spread quickly among the stunned aristocrats gathered around the gruesome crime scene inside. The sharp-eyed Detective Harlan Graves arrived promptly as thunder rumbled ominously outside the ancient Blackwood Manor.
created_at"2026-02-20T20:18:18.526Z" 2/20/2026, 8:18:18 PM
model"x-ai/grok-4.1-fast"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency266
moderation_latency(null)
generation_time12342
tokens_prompt46
tokens_completion544
native_tokens_prompt191
native_tokens_completion2119
native_tokens_completion_images0
native_tokens_reasoning1917
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"
usage0.00107505
router(null)
provider_responses
0
endpoint_id"9821aa0e-dce3-4c27-9716-161359123d0b"
id"fbd1bdcb-01b3-309c-1fd4-0496741fc236"
is_byokfalse
latency64
model_permaslug"x-ai/grok-4.1-fast"
provider_name"xAI"
status200
api_type"completions"
id"gen-1771618698-6RGCgc8BPRsswMJkHhaO"
upstream_id"fbd1bdcb-01b3-309c-1fd4-0496741fc236"
total_cost0.00107505
cache_discount0.00002265
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
0.68% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
017
117
217
317
417
516
616
716
816
917