Run: 2026-03-12-01KKHYW4S1YE1TS7ABKF8PCVS7

Run Details

Model:
Grok 4.20 (Beta, Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
7.4s
Cost:
$0.013252
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 old mansion stood silently on the hill that night. Guests had gathered inside for a special dinner party tonight. A terrible scream suddenly shattered the peaceful calm evening atmosphere. Everyone immediately rushed upstairs to find the host lying dead.
created_at"2026-03-12T21:22:36.455Z" 3/12/2026, 9:22:36 PM
model"x-ai/grok-4.20-beta-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency7274
moderation_latency(null)
generation_time7371
tokens_prompt46
tokens_completion65
native_tokens_prompt159
native_tokens_completion2194
native_tokens_completion_images0
native_tokens_reasoning2150
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"
usage0.0132516
router(null)
provider_responses
0
endpoint_id"33f49f24-a0de-4dcf-872d-ca514e83fbae"
id"0ee21b28-d213-ae39-d99a-88ed09cce7f7"
is_byokfalse
latency297
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-1773350556-88XH1CJy3SJtV95p6Ahz"
upstream_id"0ee21b28-d213-ae39-d99a-88ed09cce7f7"
total_cost0.0132516
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