Run: 2026-03-12-01KKHZNA9DPYPN6MCG1VPHV9XQ

Run Details

Model:
Grok 4.20 (Beta, Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
4.6s
Cost:
$0.007408
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
100.00% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Darkness enveloped the ancient mansion. Rain lashed against window panes. A scream pierced silent night. Servants gathered in grand hall. Butler found the lifeless body. Blood pooled under velvet chair. Inspector arrived through heavy doors. Questions filled the tense air.
created_at"2026-03-12T21:36:21.298Z" 3/12/2026, 9:36:21 PM
model"x-ai/grok-4.20-beta-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4500
moderation_latency(null)
generation_time4597
tokens_prompt46
tokens_completion69
native_tokens_prompt159
native_tokens_completion1220
native_tokens_completion_images0
native_tokens_reasoning1169
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"
usage0.0074076
router(null)
provider_responses
0
endpoint_id"33f49f24-a0de-4dcf-872d-ca514e83fbae"
id"9339de61-b0b2-63ff-c294-cf9d3e2e3ea6"
is_byokfalse
latency267
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-1773351381-xBPtSpJSC6UsZK7Aghjz"
upstream_id"9339de61-b0b2-63ff-c294-cf9d3e2e3ea6"
total_cost0.0074076
cache_discount0.0002304
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
05
15
25
35
45
55
65
75