Run: 2026-03-12-01KKHZ8WKE3QXSWR3D3ENDWX4M

Run Details

Duration:
1.1s
Cost:
$0.000912
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
14.63% 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 detective entered the dimly lit mansion foyer and noticed a chilling silence that enveloped everything around him completely. A single flickering candle cast eerie shadows across the antique furniture and ornate wallpaper patterns nearby. Suddenly he spotted a lifeless body lying motionless on the expensive Persian rug near the grand staircase base. Bloodstains formed an intricate pattern that seemed deliberately arranged like some macabre artistic signature left behind. The victim clutched an old handwritten letter tightly in his cold stiff fingers that intrigued the detective immediately. Rain began pounding heavily against the tall stained glass windows creating an ominous atmosphere throughout the entire house. He carefully examined the scene searching for any clues that might reveal what had happened here tonight.
created_at"2026-03-12T21:29:34.068Z" 3/12/2026, 9:29:34 PM
model"x-ai/grok-4.20-beta-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency337
moderation_latency(null)
generation_time1015
tokens_prompt46
tokens_completion215
native_tokens_prompt157
native_tokens_completion138
native_tokens_completion_images0
native_tokens_reasoning0
native_tokens_cached128
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"
usage0.0009116
router(null)
provider_responses
0
endpoint_id"33f49f24-a0de-4dcf-872d-ca514e83fbae"
id"bc1cf47b-8310-3fcb-d581-58bea831a2c7"
is_byokfalse
latency293
model_permaslug"x-ai/grok-4.20-beta-20260309"
provider_name"xAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer(null)
api_type"completions"
id"gen-1773350974-rSRA0XDLnL21Q2jPqmC0"
upstream_id"bc1cf47b-8310-3fcb-d581-58bea831a2c7"
total_cost0.0009116
cache_discount0.0002304
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
14.63% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
019
116
218
316
418
518
617