Run: 2026-05-01-01KQHSDG7WQVZH64KFWA2Z0H54

Run Details

Duration:
2.6s
Cost:
$0.000422
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 entered the dimly lit mansion where shadows danced across antique furniture and faded portraits. A single gunshot had shattered the peaceful evening silence leaving everyone in stunned disbelief. The wealthy host lay motionless on the ornate Persian rug with blood pooling slowly around him. Guests exchanged nervous glances while whispering theories about who might have committed this terrible crime. Outside the storm raged fiercely against the tall windows masking any potential clues or evidence. The inspector examined the body carefully noting the precise angle of the fatal wound. No weapon was visible anywhere in the elegant room puzzling all who stood nearby.
created_at"2026-05-01T12:50:01.089Z" 5/1/2026, 12:50:01 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency388
moderation_latency(null)
generation_time2568
tokens_prompt46
tokens_completion179
native_tokens_prompt157
native_tokens_completion117
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached64
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.00042155
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"84f1c47d-2d1a-1623-08a6-8b91476776a5"
is_byokfalse
latency99
model_permaslug"x-ai/grok-4.20-20260309"
provider_name"xAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777639801-suBhU2F8NkRTtFhbV9HK"
session_id(null)
api_type"completions"
id"gen-1777639801-QT9edG1wejZsKI0rhYxm"
upstream_id"84f1c47d-2d1a-1623-08a6-8b91476776a5"
total_cost0.00042155
cache_discount0.0000672
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
0.01% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
016
114
216
315
415
514
614