Run: 2026-02-20-01KHY93TJS5Z90QJ7CG6GMYZKY

Run Details

Duration:
2.9s
Cost:
$0.000273
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
34.52% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The grand old Victorian mansion stood silently under the moonlit sky tonight. Fog rolled thickly in from the river, cloaking the estate's winding drive. Inspector Hale arrived swiftly after the butler's frantic late-night telephone call. He parked his sedan and stepped out onto the gravel path. The front door creaked open as thunder rumbled ominously in the distance. Inside the dimly lit hall, shadows danced across the ornate wooden walls. A scream echoed from the drawing room, piercing the heavy, tense silence. Hale rushed forward, his hand gripping the holstered pistol at his side. There, sprawled lifeless on the bloodstained Persian rug, lay Sir Reginald Blackwood. The victim's eyes stared blankly at the chandelier above, frozen in terror.
created_at"2026-02-20T19:41:03.46Z" 2/20/2026, 7:41:03 PM
model"x-ai/grok-4-fast"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1728
moderation_latency(null)
generation_time2325
tokens_prompt46
tokens_completion200
native_tokens_prompt191
native_tokens_completion527
native_tokens_completion_images0
native_tokens_reasoning367
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"
usage0.0002732
router(null)
provider_responses
0
endpoint_id"c9586d9d-97ff-40ca-ae94-22504d6f9b7e"
id"c977e40d-a29d-d362-5553-60a168bf0f56"
is_byokfalse
latency61
model_permaslug"x-ai/grok-4-fast"
provider_name"xAI"
status200
api_type"completions"
id"gen-1771616463-pObxxPilZtMtwrtty6RW"
upstream_id"c977e40d-a29d-d362-5553-60a168bf0f56"
total_cost0.0002732
cache_discount0.0000285
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
34.52% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
012
112
212
311
412
512
612
712
812
912