Run: 2026-03-12-01KKHYRKWJCAJV68X530K9T3JZ

Run Details

Duration:
1.8s
Cost:
$0.001153
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
11.39% 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 elegant ballroom glowed softly under crystal chandeliers during the annual charity gala hosted by wealthy industrialist Victor Lang. Guests whispered excitedly while sipping expensive champagne and admiring the lavish decorations arranged throughout the spacious venue. Suddenly a sharp scream pierced the festive atmosphere causing everyone to freeze in shocked silence immediately. Victor Lang lay motionless on the polished marble floor with a gleaming silver dagger protruding from his chest. Blood slowly pooled around his elegant tuxedo creating a stark crimson contrast against the pristine white surface. Detective Elena Vargas arrived swiftly at the chaotic scene and began examining the stunned crowd with careful scrutiny. She noticed several prominent suspects exchanging nervous glances while attempting to maintain their composed facades unsuccessfully. The mystery of who killed the influential host had officially begun amid the glittering ruins of celebration.
created_at"2026-03-12T21:20:41.266Z" 3/12/2026, 9:20:41 PM
model"x-ai/grok-4.20-beta-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency443
moderation_latency(null)
generation_time1205
tokens_prompt46
tokens_completion254
native_tokens_prompt157
native_tokens_completion159
native_tokens_completion_images0
native_tokens_reasoning0
native_tokens_cached64
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"
usage0.0011528
router(null)
provider_responses
0
endpoint_id"33f49f24-a0de-4dcf-872d-ca514e83fbae"
id"7dacc380-1c41-cd5c-a2cd-c9e0e9e66b50"
is_byokfalse
latency443
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-1773350441-ekroqWEISVFdxGwEVNzw"
upstream_id"7dacc380-1c41-cd5c-a2cd-c9e0e9e66b50"
total_cost0.0011528
cache_discount0.0001152
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
11.39% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
019
117
216
318
417
518
616
717