Run: 2026-03-12-01KKHZEQ0M4J6DVPDPFK2HVS13

Run Details

Duration:
10.4s
Cost:
$0.019810
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 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The experienced detective arrived at the old mansion during the stormy night with heavy rain pouring down everywhere around him. Inside the dimly lit grand hall a lifeless body lay sprawled across the expensive Persian rug in plain sight now. The victim was the very wealthy owner of the large estate who had many enemies in the local area nearby. Several suspicious guests were staying overnight at the old mansion when the terrible crime occurred late during that fateful evening. The detective began to question all the people who were present at the scene of this brutal and unexpected murder. .
created_at"2026-03-12T21:32:44.953Z" 3/12/2026, 9:32:44 PM
model"x-ai/grok-4.20-beta-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency9982
moderation_latency(null)
generation_time10283
tokens_prompt46
tokens_completion151
native_tokens_prompt159
native_tokens_completion3287
native_tokens_completion_images0
native_tokens_reasoning3179
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"
usage0.0198096
router(null)
provider_responses
0
endpoint_id"33f49f24-a0de-4dcf-872d-ca514e83fbae"
id"a7f773fe-d324-f5b9-8c42-779808309a6d"
is_byokfalse
latency252
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-1773351164-CBwA6CKqZ0xITy8yrTV2"
upstream_id"a7f773fe-d324-f5b9-8c42-779808309a6d"
total_cost0.0198096
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
020
120
220
320
420