Run: 2026-05-01-01KQHQJ5QB6APXGMT0K7XF3HB0

Run Details

Duration:
3.0s
Cost:
$0.000317
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
0.01% 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 wealthy host welcomed his distinguished guests to the isolated mansion on a stormy autumn evening. Everyone gathered in the elegant drawing room sipping expensive cocktails and making polite conversation quietly. Suddenly the lights flickered once before plunging the entire room into complete darkness and chaos. A bloodcurdling scream pierced the heavy silence that had descended upon the frightened gathering instantly. When the lights finally returned the host lay dead on the antique Persian rug dramatically. Each guest stared at the body with wide eyes and growing suspicion immediately.
created_at"2026-05-01T12:17:37.008Z" 5/1/2026, 12:17:37 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency517
moderation_latency(null)
generation_time2919
tokens_prompt46
tokens_completion155
native_tokens_prompt157
native_tokens_completion102
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached128
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.00031685
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"3d649bf8-2ee8-9b4c-a057-ed6124248c6c"
is_byokfalse
latency117
model_permaslug"x-ai/grok-4.20-20260309"
provider_name"xAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777637857-9vhhmKcuslFDqj09UW8S"
session_id(null)
api_type"completions"
id"gen-1777637857-LKbAiHhZHZQD2M9Jv0Dk"
upstream_id"3d649bf8-2ee8-9b4c-a057-ed6124248c6c"
total_cost0.00031685
cache_discount0.0001344
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
0.01% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
016
115
215
315
415
513