Run: 2026-02-20-01KHY9GN146VZCRXM7M6VJ4FT4

Run Details

Duration:
4.3s
Cost:
$0.000284
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
0.23% 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 fog clung thickly to the cobblestone streets of Victorian London on that fateful autumn evening. A lone gas lamp flickered weakly, casting eerie shadows on the alley's damp and uneven walls. Inspector Hargrove hurried along, his coat whipping in the chill wind that howled through the narrow pass. He'd received a urgent telegram about a grisly discovery in the heart of Whitechapel district now. Pushing open the creaking gate, he entered the modest townhouse where screams had echoed earlier tonight. Inside the parlor, candlelight revealed a scene of chaos with overturned furniture and shattered porcelain dolls. The victim, a prominent banker named Elias Thorne, lay sprawled across the Persian rug in silence. A single stab wound pierced his chest, blood staining the silk cravat he wore so proudly. Hargrove knelt beside the body, noting the absence of struggle marks or signs of forced entry here. Footsteps echoed from the hallway as the maid appeared, her face pale with unbridled terror. She whispered that she'd found him moments after the clock struck midnight in the empty house.
created_at"2026-02-20T19:48:03.758Z" 2/20/2026, 7:48:03 PM
model"x-ai/grok-4-fast"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2324
moderation_latency(null)
generation_time4069
tokens_prompt46
tokens_completion287
native_tokens_prompt191
native_tokens_completion548
native_tokens_completion_images0
native_tokens_reasoning321
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"
usage0.0002837
router(null)
provider_responses
0
endpoint_id"c9586d9d-97ff-40ca-ae94-22504d6f9b7e"
id"4890b64e-e6ac-c605-0cd5-ff258629e9a6"
is_byokfalse
latency427
model_permaslug"x-ai/grok-4-fast"
provider_name"xAI"
status200
api_type"completions"
id"gen-1771616883-5U7cDlMrK4NpKKklrmw2"
upstream_id"4890b64e-e6ac-c605-0cd5-ff258629e9a6"
total_cost0.0002837
cache_discount0.0000285
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
0.23% Matches word count n/a
neededCleanfalse
sentences11
wordCounts
016
116
217
316
416
516
616
716
817
915
1016