Run: 2026-02-20-01KHY7N9AV5MJWGKD1YTQHMXWZ

Run Details

Duration:
4.7s
Cost:
$0.000264
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
0.25% 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 grand Victorian manor loomed dark against the stormy night sky over the quiet English village. Inside the drawing room, guests gathered around the crackling fire, sharing stories of local legends and lore. Lady Eleanor Harrington, the elegant hostess, poured aged brandy into crystal glasses for her assembled friends. Suddenly, a sharp cry echoed from the upstairs corridor, freezing everyone in their elegant evening attire. Sir Reginald, her husband, rose quickly from his armchair and dashed toward the winding oak staircase. The group followed hesitantly, their footsteps thudding softly on the polished hardwood floors below. At the bedroom door, they found it ajar, with shadows dancing wildly from the flickering candlelight. Pushing it open, Sir Reginald gasped at the sight of blood pooling on the antique Persian rug. Lady Eleanor's lifeless body lay sprawled across the four-poster bed, her throat slashed deeply open. Detective Inspector Harrow arrived soon after, his keen eyes scanning the room for any telling clues.
created_at"2026-02-20T19:15:38.472Z" 2/20/2026, 7:15:38 PM
model"x-ai/grok-4-fast"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3066
moderation_latency(null)
generation_time4612
tokens_prompt46
tokens_completion271
native_tokens_prompt191
native_tokens_completion498
native_tokens_completion_images0
native_tokens_reasoning293
native_tokens_cached152
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"
usage0.0002644
router(null)
provider_responses
0
endpoint_id"c9586d9d-97ff-40ca-ae94-22504d6f9b7e"
id"30beb738-348c-acdc-80f9-142d73ff22e2"
is_byokfalse
latency87
model_permaslug"x-ai/grok-4-fast"
provider_name"xAI"
status200
api_type"completions"
id"gen-1771614938-a8mGE1W6BmSzM7U5VbFe"
upstream_id"30beb738-348c-acdc-80f9-142d73ff22e2"
total_cost0.0002644
cache_discount0.0000228
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
0.25% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
016
117
216
316
416
514
616
717
816
916