Run: 2026-03-12-01KKHZMM7A28AGMCNPNW6XXMM5

Run Details

Model:
Grok 4.20 (Beta, Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
9.9s
Cost:
$0.016162
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 manor stood dark tonight. A scream echoed through halls. Butler discovered the lifeless body. Police rushed to the scene. Detective examined the murder weapon. Suspects waited in the parlor. Tension filled the entire room. Clues pointed towards family members.
created_at"2026-03-12T21:35:58.704Z" 3/12/2026, 9:35:58 PM
model"x-ai/grok-4.20-beta-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency9742
moderation_latency(null)
generation_time9864
tokens_prompt46
tokens_completion66
native_tokens_prompt159
native_tokens_completion2679
native_tokens_completion_images0
native_tokens_reasoning2629
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"
usage0.0161616
router(null)
provider_responses
0
endpoint_id"33f49f24-a0de-4dcf-872d-ca514e83fbae"
id"3aab7d9e-a7c4-ce92-ec8b-7c6b03ef9ac5"
is_byokfalse
latency291
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-1773351358-TfBlbzMiqK0MM7mQMRDE"
upstream_id"3aab7d9e-a7c4-ce92-ec8b-7c6b03ef9ac5"
total_cost0.0161616
cache_discount0.0002304
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
05
15
25
35
45
55
65
75