Run: 2026-05-01-01KQHRXY0G71KW828ZCMKHYGT8

Run Details

Model:
Grok 4.20
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
2.3s
Cost:
$0.000309
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
11.05% 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 old wooden floors revealing hidden secrets everywhere. A single gunshot echoed through silent corridors alerting all guests who had gathered for the exclusive weekend party. Blood pooled slowly underneath the victim who lay motionless near an antique grandfather clock that had stopped ticking. Everyone present exchanged nervous glances while wondering who among them could have committed this heinous unexpected crime. The inspector examined the body carefully searching for any clues that might solve this puzzling deadly mystery soon.
created_at"2026-05-01T12:41:30.904Z" 5/1/2026, 12:41:30 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency439
moderation_latency(null)
generation_time2165
tokens_prompt46
tokens_completion157
native_tokens_prompt157
native_tokens_completion99
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"
usage0.00030935
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"6df2175e-9a70-9cd3-9c23-a4dbddf7986e"
is_byokfalse
latency99
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-1777639290-FWG29yg1IMYYcpfeRqyz"
session_id(null)
api_type"completions"
id"gen-1777639290-T159fEiR1aytJnt915xq"
upstream_id"6df2175e-9a70-9cd3-9c23-a4dbddf7986e"
total_cost0.00030935
cache_discount0.0001344
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
11.05% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
018
118
218
317
418