Run: 2026-02-20-01KHYAEWAM9XMKPC5AX44QX86A

Run Details

Duration:
3.6s
Cost:
$0.000194
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
77.88% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Fog cloaked the ancient manor house. Detective Hale arrived under moonlit sky. Gravel crunched beneath his weary boots. Front door stood slightly ajar now. He entered the dimly lit foyer. A scream shattered the heavy silence. Upstairs hallway reeked of fresh blood. Body sprawled across the Persian rug. Throat slashed in brutal crimson arc. Eyes stared blankly at chandelier above. No weapon lay in shadowed room. Suspects gathered in the drawing room. Mystery unfolded in the witching hour.
created_at"2026-02-20T20:04:34.275Z" 2/20/2026, 8:04:34 PM
model"x-ai/grok-4-fast"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2035
moderation_latency(null)
generation_time3451
tokens_prompt46
tokens_completion138
native_tokens_prompt191
native_tokens_completion357
native_tokens_completion_images0
native_tokens_reasoning239
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"
usage0.0001939
router(null)
provider_responses
0
endpoint_id"c9586d9d-97ff-40ca-ae94-22504d6f9b7e"
id"2a17e4e9-13e1-5b5c-f9a3-74060d646e9b"
is_byokfalse
latency72
model_permaslug"x-ai/grok-4-fast"
provider_name"xAI"
status200
api_type"completions"
id"gen-1771617874-PvDWyTKIPkwSic0hNVND"
upstream_id"2a17e4e9-13e1-5b5c-f9a3-74060d646e9b"
total_cost0.0001939
cache_discount0.0000228
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
77.88% Matches word count n/a
neededCleanfalse
sentences13
wordCounts
06
16
26
36
46
56
66
76
86
96
106
116
126