Run: 2026-03-12-01KKHYXSTD2F155GN4T8P5BR9Z

Run Details

Duration:
1.9s
Cost:
$0.000726
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
4.52% 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 where shadows danced across ancient oak paneled walls with eerie silence. A single gunshot echoed through the grand hallway revealing a lifeless body sprawled near the fireplace. Blood pooled slowly beneath the victim creating a stark contrast against the expensive Persian rug below. Servants whispered nervously in the corners avoiding any direct eye contact with the arriving authorities. Rain pounded relentlessly against the tall windows adding tension to the already mysterious atmosphere inside. The clock struck midnight precisely as more police officers began their careful examination of the crime scene evidence.
created_at"2026-03-12T21:23:30.77Z" 3/12/2026, 9:23:30 PM
model"x-ai/grok-4.20-beta-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency318
moderation_latency(null)
generation_time1874
tokens_prompt46
tokens_completion167
native_tokens_prompt157
native_tokens_completion107
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"
usage0.0007256
router(null)
provider_responses
0
endpoint_id"33f49f24-a0de-4dcf-872d-ca514e83fbae"
id"983c27e3-34f8-18e9-a678-8d8dc760e674"
is_byokfalse
latency285
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-1773350610-md0OEEk52rkgg1Igfd7s"
upstream_id"983c27e3-34f8-18e9-a678-8d8dc760e674"
total_cost0.0007256
cache_discount0.0002304
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
4.52% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
018
116
216
315
415
518