Run: 2026-02-20-01KHY843K98Y2E6TK4MHTDBSSB

Run Details

Duration:
6.2s
Cost:
$0.000374
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
14.76% 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
Fog shrouded Blackwood Manor on the stormy moor where ten guests gathered for a lavish dinner party tonight. Lightning flashed across the sky as thunder rumbled, casting eerie shadows through the tall mullioned windows inside. Host Edgar Blackwood raised his glass to toast the group's success in their secretive business ventures together. Suddenly, a piercing scream echoed from the library, shattering the tense atmosphere of polite conversation and clinking glasses. Guests rushed toward the heavy oak door, hearts pounding with dread at the unknown horror awaiting them there. Pushing it open, they found Edgar sprawled lifeless on the Persian rug, blood pooling beneath his head. A sharp letter opener lay clutched in his stiff hand, but the wound gaped wide from behind his skull. Constable Hale arrived swiftly through the gale, his raincoat dripping as he surveyed the gruesome scene before him.
created_at"2026-02-20T19:23:44.115Z" 2/20/2026, 7:23:44 PM
model"x-ai/grok-4.1-fast"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency268
moderation_latency(null)
generation_time6116
tokens_prompt46
tokens_completion317
native_tokens_prompt191
native_tokens_completion716
native_tokens_completion_images0
native_tokens_reasoning541
native_tokens_cached151
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"
usage0.00037355
router(null)
provider_responses
0
endpoint_id"9821aa0e-dce3-4c27-9716-161359123d0b"
id"a62ceee2-d6bd-d7e9-f436-009bc4275050"
is_byokfalse
latency73
model_permaslug"x-ai/grok-4.1-fast"
provider_name"xAI"
status200
api_type"completions"
id"gen-1771615424-5pzt2fJ6O0Tq3ZAqa4DY"
upstream_id"a62ceee2-d6bd-d7e9-f436-009bc4275050"
total_cost0.00037355
cache_discount0.00002265
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
14.76% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
018
117
217
318
418
517
619
718