Model

Writer: Palmyra X5

Test

N-Length Sentences

Scenario

Write sentences with 20 words each

Run ID

2026-02-08-01KGYZR69Y1F0V30YAHMSF78EV

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 rain fell hard on cobblestones, echoing through the silent, shadowed streets of the old city district late one Tuesday night. Detective Mara Voss pulled her coat tighter, boots splashing through puddles as she approached the dimly lit townhouse on Willow Lane. Yellow police tape fluttered in the wind, fluttering like a warning ribbon stretched between the iron gate and a broken potted fern. Inside, the parlor was freezing, the fire long dead, but the room reeked of burnt almonds and something darker, coppery like blood. A man lay sprawled across the Persian rug, eyes wide open, mouth frozen in surprise, a silver letter opener buried in his chest. No one had heard a scream, the butler claimed, though the windows were cracked open and the clock had stopped at 9:17 exactly. Mara crouched beside the body, noting the polished shoes, the gold cufflinks, the faint smudge of lipstick on his right cheek. The victim was Charles Dunleigh, head of Dunleigh Shipping, recently divorced, currently embroiled in a scandal involving missing cargo and a mistress in Lisbon. She scanned the bookshelves, the untouched brandy glasses, the torn photograph near the hearth showing half a smiling couple violently ripped apart. Someone wanted him dead, someone close, someone who knew his routines, his secrets, his weaknesses—and who’d left behind almost no trace at all.
created_at"2026-02-08T16:01:05.597439+00:00" Sunday, February 8th, 2026 at 4:01:05 PM GMT+00:00
model"writer/palmyra-x5-20250428" 
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3391
moderation_latency175
generation_time6822
tokens_prompt35
tokens_completion298
native_tokens_prompt273
native_tokens_completion305
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached0
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"stop" 
usage0.0019938
router(null)
provider_responses
0
status200
is_byokfalse
latency3391
endpoint_id"c684c4e7-1b77-4ca5-9516-7ecc66e2c455" 
provider_name"Amazon Bedrock" 
model_permaslug"writer/palmyra-x5-20250428" 
api_type"completions" 
id"gen-1770566457-sWmD1GW05mZJZUFeiIxs" 
upstream_id(null)
total_cost0.0019938
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock" 

Evaluation details

Result Evaluator Details Meta Data
22.4849% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
021
121
222
322
423
523
621
724
822
924