NC Bench
Overview
About
Tests
Models
Model
Writer: Palmyra X5
Test
N-Length Sentences
Scenario
Write sentences with 20 words each
Run ID
2026-02-08-01KGYXJGRSNYF4R1YPQ8Y363NB
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
Messages
Meta
AI
The rain fell in straight silver lines, soaking the cobblestones of Elm Street with quiet, relentless precision. Detective Mara Voss stepped through the yellow tape, her coat damp, her eyes scanning the silent, onlooker-crowded scene. A body lay sprawled near the oak tree, one arm outstretched, fingers curled as if grasping at fading life. Blood pooled beneath the victim’s head, dark as wine, mixing slowly with the rainwater circling the gutters. Neighbors whispered behind cupped hands, their breath visible in the cold dawn air, eyes glinting with fear and curiosity. Mara knelt, gloves snapping taut, noting the victim’s watch had stopped at precisely three seventeen in the morning. A single pearl button rested near the left hand, pristine, out of place on the muddy, trampled grass nearby. She glanced up, spotting a curtain twitch in the gray house directly across the narrow, rain-slicked street. No forced entry was visible on the victim’s front door, which stood slightly ajar, creaking with each breeze. The victim’s name, later confirmed as Arthur Bellweather, meant nothing to Mara, though something in his face felt familiar. She stood, motioning to the forensics team, her mind already tracing invisible threads between the button, the watch, the oak tree. This was no random act, she thought, the pattern too careful, too cold, too deliberately arranged beneath the weeping sky.
created_at
"2026-02-08T15:23:16.575644+00:00"
Sunday, February 8th, 2026 at 3:23:16 PM GMT+00:00
model
"writer/palmyra-x5-20250428"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
17641
moderation_latency
195
generation_time
21411
tokens_prompt
35
tokens_completion
310
native_tokens_prompt
273
native_tokens_completion
316
native_tokens_completion_images
(null)
native_tokens_reasoning
0
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"stop"
usage
0.0020598
router
(null)
provider_responses
0
status
200
is_byok
false
latency
17637
endpoint_id
"c684c4e7-1b77-4ca5-9516-7ecc66e2c455"
provider_name
"Amazon Bedrock"
model_permaslug
"writer/palmyra-x5-20250428"
api_type
"completions"
id
"gen-1770564174-HOcVrOMdAz8Y4OE2Y5AA"
upstream_id
(null)
total_cost
0.0020598
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Amazon Bedrock"
Evaluation details
Result
Evaluator
Details
Meta Data
42.2284%
Matches word count
n/a
neededClean
false
sentences
12
wordCounts
0
17
1
19
2
19
3
17
4
19
5
18
6
19
7
18
8
18
9
19
10
21
11
20