Run: 2026-02-20-01KHYB8AGZVSKMM4NC65FCJ2P6

Run Details

Model:
Grok 4
Duration:
12.1s
Cost:
$0.005267
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
74.08% 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 fog shrouded the old mansion on the hilltop. A single light flickered in the upstairs window pane. Detective Ellis arrived, his coat damp from the mist. He knocked firmly on the heavy oak front door. No answer came, only echoes in the silent night. Pushing the door open, he stepped into the foyer. A chilling scream pierced the air from somewhere upstairs. Ellis drew his revolver, heart pounding in his chest. He climbed the creaking stairs, shadows dancing around him. At the landing, a body lay sprawled in blood.
created_at"2026-02-20T20:18:28.011Z" 2/20/2026, 8:18:28 PM
model"x-ai/grok-4-07-09" 4/7/2009, 12:00:00 AM
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency6912
moderation_latency(null)
generation_time12027
tokens_prompt46
tokens_completion146
native_tokens_prompt719
native_tokens_completion315
native_tokens_completion_images0
native_tokens_reasoning204
native_tokens_cached718
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"
usage0.0052665
router(null)
provider_responses
0
endpoint_id"d40bef9d-6936-4c57-9749-bf7399de4a77"
id"9cec6f38-e403-0d8e-bf77-83cc22da9a30"
is_byokfalse
latency81
model_permaslug"x-ai/grok-4-07-09" 4/7/2009, 12:00:00 AM
provider_name"xAI"
status200
api_type"completions"
id"gen-1771618708-cC2EgXzFTl0FpQrxscqS"
upstream_id"9cec6f38-e403-0d8e-bf77-83cc22da9a30"
total_cost0.0052665
cache_discount0.0016155
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
74.08% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
09
19
29
39
49
59
69
79
89
99