Run: 2026-02-20-01KHYAJ35S3B5926Z8DX67VV6R

Run Details

Duration:
13.5s
Cost:
$0.000452
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
94.82% 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 enveloped the mansion atop the lonely, windswept hill. Sir Reginald's body sprawled lifelessly across the study's Persian rug. A crimson pool spread slowly from the single fatal stab wound. Detective Harlan Black arrived swiftly at the chaotic crime scene. The butler trembled nearby, his face pale with obvious terror. Guests huddled fearfully in the drawing room down the hall. Lady Eleanor swooned dramatically upon the shocking, gruesome news report. A gleaming candlestick rested oddly on the mantelpiece by the fire. Footprints trailed suspiciously toward the rain-lashed French doors outside. Who plunged the blade into the heart of the host?
created_at"2026-02-20T20:06:19.585Z" 2/20/2026, 8:06:19 PM
model"x-ai/grok-4.1-fast"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency266
moderation_latency(null)
generation_time13408
tokens_prompt46
tokens_completion226
native_tokens_prompt191
native_tokens_completion872
native_tokens_completion_images0
native_tokens_reasoning736
native_tokens_cached151
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"
usage0.00045155
router(null)
provider_responses
0
endpoint_id"9821aa0e-dce3-4c27-9716-161359123d0b"
id"c00663cf-97b7-853c-abe5-486ef698bcc9"
is_byokfalse
latency47
model_permaslug"x-ai/grok-4.1-fast"
provider_name"xAI"
status200
api_type"completions"
id"gen-1771617979-ux9Exx4S4sRw6YYkgoRa"
upstream_id"c00663cf-97b7-853c-abe5-486ef698bcc9"
total_cost0.00045155
cache_discount0.00002265
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
94.82% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
010
110
211
310
410
510
610
711
810
910