Run: 2026-03-12-01KKHYVG5NAG9SVX87SMEVXMGH

Run Details

Duration:
1.4s
Cost:
$0.000912
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
0.01% 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 detective arrived at the grand estate just as the clock struck midnight with eerie precision. Rain poured relentlessly down on the silent mansion hiding its dark secrets from view carefully. A single light flickered weakly in the upstairs bedroom where the victim lay motionless forever now. The butler stood rigidly by the door with an expression revealing nothing about the night's events. Blood stained the antique carpet in intricate patterns that told a story of sudden violence. Footsteps echoed through the empty hallway as shadows danced mysteriously across the ancient walls. Everyone gathered in the drawing room with faces pale under the dim chandelier light. The inspector examined the scene carefully noting every detail that seemed out of place tonight.
created_at"2026-03-12T21:22:15.353Z" 3/12/2026, 9:22:15 PM
model"x-ai/grok-4.20-beta-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency324
moderation_latency(null)
generation_time1289
tokens_prompt46
tokens_completion200
native_tokens_prompt157
native_tokens_completion138
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"
usage0.0009116
router(null)
provider_responses
0
endpoint_id"33f49f24-a0de-4dcf-872d-ca514e83fbae"
id"7f2239dd-c92f-ff21-52c8-e20b468610fc"
is_byokfalse
latency279
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-1773350535-p2ynJTZNeWfyawwomZ3C"
upstream_id"7f2239dd-c92f-ff21-52c8-e20b468610fc"
total_cost0.0009116
cache_discount0.0002304
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
0.01% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
016
115
216
316
415
514
614
715