Run: 2026-03-12-01KKHZ99W57ZV96ZTDPF6WD1S2

Run Details

Model:
Grok 4.20 (Beta, Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
7.9s
Cost:
$0.012544
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
The old mansion loomed ominously. The body lay cold inside. Blood pooled on the carpet. Detective arrived at the scene. He searched for hidden clues. The butler seemed very nervous. All the guests looked scared.
created_at"2026-03-12T21:29:47.66Z" 3/12/2026, 9:29:47 PM
model"x-ai/grok-4.20-beta-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency7626
moderation_latency(null)
generation_time7860
tokens_prompt46
tokens_completion53
native_tokens_prompt159
native_tokens_completion2076
native_tokens_completion_images0
native_tokens_reasoning2032
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"
usage0.0125436
router(null)
provider_responses
0
endpoint_id"33f49f24-a0de-4dcf-872d-ca514e83fbae"
id"5737504e-9a7d-dde6-c76d-ed63330506cc"
is_byokfalse
latency283
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-1773350987-PCVTvojqTnNjqmLacCva"
upstream_id"5737504e-9a7d-dde6-c76d-ed63330506cc"
total_cost0.0125436
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