Run: 2026-03-12-01KKHZ1AQM9MDQRY82E1GWT1BB

Run Details

Model:
Grok 4.20 (Beta, Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
4.1s
Cost:
$0.006376
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
Rain fell on dark streets. The door creaked open slowly. A man found the corpse. Shock registered on his face. He called for help immediately.
created_at"2026-03-12T21:25:26.392Z" 3/12/2026, 9:25:26 PM
model"x-ai/grok-4.20-beta-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3896
moderation_latency(null)
generation_time4045
tokens_prompt46
tokens_completion40
native_tokens_prompt159
native_tokens_completion1048
native_tokens_completion_images0
native_tokens_reasoning1013
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"
usage0.0063756
router(null)
provider_responses
0
endpoint_id"33f49f24-a0de-4dcf-872d-ca514e83fbae"
id"86256803-ad2b-7a5e-022b-60c3e6f1ad16"
is_byokfalse
latency286
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-1773350726-KqcyasvFbJVWe6pnsdtt"
upstream_id"86256803-ad2b-7a5e-022b-60c3e6f1ad16"
total_cost0.0063756
cache_discount0.0002304
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
05
15
25
35
45