Run: 2026-05-01-01KQHRM8SK02DSRDQ7HCFRBDVS

Run Details

Duration:
3.6s
Cost:
$0.000539
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
33.99% 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 with a sense of foreboding deep within his experienced heart that night. Shadows danced across the antique walls revealing hidden secrets from the past that no one dared to mention openly. A single scream pierced the silence echoing through every corridor and room like an ominous warning of impending doom. Blood pooled on the expensive Persian rug staining its intricate patterns with evidence of violent struggle and death. The victim lay motionless near the grand fireplace clutching a mysterious letter that could solve the entire case soon. Guests gathered nervously in the opulent drawing room exchanging suspicious glances while awaiting official questioning by authorities. Lightning flashed outside illuminating frightened faces through tall windows as thunder rumbled like an angry beast overhead. The clock struck midnight signaling the beginning of an investigation filled with twists lies and unexpected revelations ahead.
created_at"2026-05-01T12:36:14.265Z" 5/1/2026, 12:36:14 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency420
moderation_latency(null)
generation_time3558
tokens_prompt46
tokens_completion252
native_tokens_prompt157
native_tokens_completion164
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"
usage0.00053905
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"a6b99849-e20e-9319-9856-1051808dcda0"
is_byokfalse
latency96
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-1777638974-Z1ceTGsNAroJ0pf0df0O"
session_id(null)
api_type"completions"
id"gen-1777638974-nY7BrPO900dOgxJREOQp"
upstream_id"a6b99849-e20e-9319-9856-1051808dcda0"
total_cost0.00053905
cache_discount0.0000672
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
33.99% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
019
119
219
318
419
517
617
718