Run: 2026-03-12-01KKHZJ8D3EAJ67VCF9F7AME2C

Run Details

Model:
Grok 4.20 (Beta)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
649ms
Cost:
$0.000378
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
82.80% 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 mansion loomed silently ahead. Rain pounded hard outside. A scream echoed through darkness. Footsteps hurried toward library. Blood stained antique carpet. Detective entered grim scene. Butler trembled with fear. Clock struck midnight sharply. Mystery deepened instantly now.
created_at"2026-03-12T21:34:41.064Z" 3/12/2026, 9:34:41 PM
model"x-ai/grok-4.20-beta-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency325
moderation_latency(null)
generation_time598
tokens_prompt46
tokens_completion70
native_tokens_prompt157
native_tokens_completion49
native_tokens_completion_images0
native_tokens_reasoning0
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"
usage0.0003776
router(null)
provider_responses
0
endpoint_id"33f49f24-a0de-4dcf-872d-ca514e83fbae"
id"050f264e-8352-6cc7-ebde-fe1e0cbcf363"
is_byokfalse
latency281
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-1773351281-dQSH4EqltNTlARNqsLU8"
upstream_id"050f264e-8352-6cc7-ebde-fe1e0cbcf363"
total_cost0.0003776
cache_discount0.0002304
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
82.80% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
05
14
25
34
44
54
64
74
84