Run: 2026-03-12-01KKHZNXFZKXY0J3P3NGJCZN0D

Run Details

Duration:
1.2s
Cost:
$0.000840
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
65.92% 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 arrived at the old mansion during a stormy night filled with thunder and lightning all around the property. Every window seemed to whisper secrets from the past while shadows danced across the antique wooden floors inside. A single scream had echoed through the halls just moments before police received an urgent anonymous telephone call about trouble. The victim lay motionless on the elegant Persian rug with a silver dagger protruding from his chest cavity area. Rain pounded relentlessly against the tall Victorian windows as guests gathered nervously in the dimly lit drawing room nearby. No one dared to speak about what they might have seen or heard earlier that fateful evening at dinner.
created_at"2026-03-12T21:36:40.972Z" 3/12/2026, 9:36:40 PM
model"x-ai/grok-4.20-beta-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency342
moderation_latency(null)
generation_time1065
tokens_prompt46
tokens_completion184
native_tokens_prompt157
native_tokens_completion126
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"
usage0.0008396
router(null)
provider_responses
0
endpoint_id"33f49f24-a0de-4dcf-872d-ca514e83fbae"
id"ef74d8b3-3115-a8b8-b56e-ac31f3a3ef53"
is_byokfalse
latency301
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-1773351400-onS9qb4DwIze57g9ZyYp"
upstream_id"ef74d8b3-3115-a8b8-b56e-ac31f3a3ef53"
total_cost0.0008396
cache_discount0.0002304
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
65.92% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
118
220
319
419
519