Model

Claude Sonnet 4.5

Test

N-Length Sentences

Scenario

Write sentences with 5 words each

Run ID

2026-02-08-01KGYZ80BJAQ28AY60JFBAHCY0

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
The manor stood silently waiting. Rain hammered the stone walls. Detective Sarah Chen arrived late. Her coat dripped onto marble. Lightning illuminated the grand entrance. A butler opened the door. His face was deathly pale. "Lord Ashworth is quite dead," he whispered through thin lips. Sarah stepped into the foyer. Candles flickered in the darkness. Shadows danced across oil paintings. The air smelled of cigars. And something else: bitter almonds. Upstairs, a woman was screaming. Footsteps echoed through empty hallways. Sarah climbed the winding staircase. Her hand touched cold mahogany. The body lay face down. Blood pooled on Persian carpet. Six guests stood frozen, watching. Each face held dark secrets. One of them was guilty. The clock struck midnight precisely. The investigation would now begin.
created_at"2026-02-08T15:52:13.183201+00:00" Sunday, February 8th, 2026 at 3:52:13 PM GMT+00:00
model"anthropic/claude-4.5-sonnet-20250929" 
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1234
moderation_latency144
generation_time5050
tokens_prompt35
tokens_completion165
native_tokens_prompt44
native_tokens_completion195
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" 
usage0.003057
router(null)
provider_responses
0
id"f76a9431-cfa1-409f-9393-1c7c06255619" 
status200
is_byokfalse
latency1233
endpoint_id"d8bee848-f020-454a-b2be-4a7ce868f99f" 
provider_name"Amazon Bedrock" 
model_permaslug"anthropic/claude-4.5-sonnet-20250929" 
api_type"completions" 
id"gen-1770565927-KEnyIQO3bPoJn9mwVuka" 
upstream_id"f76a9431-cfa1-409f-9393-1c7c06255619" 
total_cost0.003057
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock" 

Evaluation details

Result Evaluator Details Meta Data
95.8333% Matches word count n/a
neededCleanfalse
sentences24
wordCounts
05
15
25
35
45
55
65
710
85
95
105
115
125
135
145
155
165
175
185
195
205
215
225
235