Run: 2026-02-20-01KHY8VPK6G56K4MJ4FEM9TR46

Run Details

Duration:
2.5s
Cost:
$0.000262
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 fog-shrouded mansion just as the clock struck midnight in silence. A maid's frantic scream shattered the quiet night air filled with tension and dread. She led him to the library where the body lay sprawled on the Persian rug. Blood pooled beneath the victim's head from a single, precise blow with a heavy candlestick. Bookshelves loomed like silent witnesses around the scene of this brutal, unexpected crime. No signs of forced entry appeared on the heavy oak doors or the tall windows nearby. The victim's eyes stared blankly at the chandelier above in frozen, eternal surprise and fear. Footprints in dust trailed toward the French doors leading out into the misty garden path. Whispers of family secrets hung heavy in the room like the scent of aged leather. Who among the guests had motive strong enough to end this life so ruthlessly now?
created_at"2026-02-20T19:36:37.233Z" 2/20/2026, 7:36:37 PM
model"x-ai/grok-4-fast"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1528
moderation_latency(null)
generation_time2313
tokens_prompt46
tokens_completion230
native_tokens_prompt191
native_tokens_completion504
native_tokens_completion_images0
native_tokens_reasoning322
native_tokens_cached190
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"
usage0.0002617
router(null)
provider_responses
0
endpoint_id"c9586d9d-97ff-40ca-ae94-22504d6f9b7e"
id"21b804a4-bdf3-b1ad-987f-d4867e8a283f"
is_byokfalse
latency131
model_permaslug"x-ai/grok-4-fast"
provider_name"xAI"
status200
api_type"completions"
id"gen-1771616197-348OpiY0KfjCPiI6zlJW"
upstream_id"21b804a4-bdf3-b1ad-987f-d4867e8a283f"
total_cost0.0002617
cache_discount0.0000285
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
0.01% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
016
114
215
315
413
516
615
715
815
915