Run: 2026-03-12-01KKHZDWM48P56CAN3JSZ9017E

Run Details

Model:
Grok 4.20 (Beta, Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
5.8s
Cost:
$0.009646
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The grand estate loomed ominously under the stormy night sky. A prominent businessman was found murdered in his private study. Blood stained the expensive carpet beneath the lifeless body there. The lead detective started questioning every suspicious guest immediately now.
created_at"2026-03-12T21:32:17.93Z" 3/12/2026, 9:32:17 PM
model"x-ai/grok-4.20-beta-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5629
moderation_latency(null)
generation_time5743
tokens_prompt46
tokens_completion69
native_tokens_prompt159
native_tokens_completion1593
native_tokens_completion_images0
native_tokens_reasoning1547
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"
usage0.0096456
router(null)
provider_responses
0
endpoint_id"33f49f24-a0de-4dcf-872d-ca514e83fbae"
id"45e021d4-0363-990e-132c-a0c12fdac608"
is_byokfalse
latency320
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-1773351137-A52emim342a0SiieTWmH"
upstream_id"45e021d4-0363-990e-132c-a0c12fdac608"
total_cost0.0096456
cache_discount0.0002304
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences4
wordCounts
010
110
210
310