Run: 2026-03-12-01KKHZJHTW8X85XKAD7R5B3ZTK

Run Details

Model:
Grok 4.20 (Beta, Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
7.7s
Cost:
$0.011824
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
Lightning flashed across dark sky. A cry echoed in mansion. Butler ran towards the study. He saw the dead body. Panic spread among the guests. Police arrived early next morning. Detective examined every small detail.
created_at"2026-03-12T21:34:50.721Z" 3/12/2026, 9:34:50 PM
model"x-ai/grok-4.20-beta-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency7427
moderation_latency(null)
generation_time7683
tokens_prompt46
tokens_completion54
native_tokens_prompt159
native_tokens_completion1956
native_tokens_completion_images0
native_tokens_reasoning1914
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"
usage0.0118236
router(null)
provider_responses
0
endpoint_id"33f49f24-a0de-4dcf-872d-ca514e83fbae"
id"ef1ea9c9-88e6-12ae-e393-c6ce6b7006e4"
is_byokfalse
latency248
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-1773351290-Ik0hQNzRroN7VYMRHpm7"
upstream_id"ef1ea9c9-88e6-12ae-e393-c6ce6b7006e4"
total_cost0.0118236
cache_discount0.0002304
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
05
15
25
35
45
55
65