Run: 2026-03-12-01KKHYV0HGAW7P9B8A6AW9AAVR

Run Details

Model:
Grok 4.20 (Beta)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
885ms
Cost:
$0.000528
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
95.68% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 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 at midnight exactly. Blood stained the antique rug near the victim's silent body. Servants whispered nervously about strange noises from upstairs rooms. The heir appeared shocked while clutching a valuable family heirloom. Police arrived quickly to secure the entire crime scene immediately. Hidden motives lurked behind every guest's carefully constructed facade tonight.
created_at"2026-03-12T21:21:59.35Z" 3/12/2026, 9:21:59 PM
model"x-ai/grok-4.20-beta-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency352
moderation_latency(null)
generation_time822
tokens_prompt46
tokens_completion109
native_tokens_prompt157
native_tokens_completion74
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"
usage0.0005276
router(null)
provider_responses
0
endpoint_id"33f49f24-a0de-4dcf-872d-ca514e83fbae"
id"faa1a3d4-7fc0-79fb-227c-470fd1a7b236"
is_byokfalse
latency322
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-1773350519-ShT16YTKV8mgZ2SFk9qT"
upstream_id"faa1a3d4-7fc0-79fb-227c-470fd1a7b236"
total_cost0.0005276
cache_discount0.0002304
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
95.68% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
010
110
29
310
410
510