NC Bench
Overview
About
Tests
Models
Model
Claude Sonnet 4.5
Test
N-Length Sentences
Scenario
Write sentences with 10 words each
Run ID
2026-02-08-01KGYWXMSZWQ9WM6ZM2KWDSD6K
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
Messages
Meta
AI
The ancient grandfather clock struck midnight in the shadowy manor. Detective Sarah Chen studied the body sprawled on marble floors. Blood pooled beneath Lord Ashford's head like dark crimson silk. His eyes stared upward with frozen terror and terrible surprise. The murder weapon, a silver candlestick, lay nearby on carpet. Eight dinner guests remained trapped inside during the raging snowstorm. One among them had killed their host just hours earlier. Sarah noticed the broken glass near the victim's outstretched fingers. A torn piece of fabric clung to his cold hand. Outside, wind howled through bare trees like mournful desperate ghosts. The killer was still here, watching, waiting, hiding in shadows.
created_at
"2026-02-08T15:11:37.382645+00:00"
Sunday, February 8th, 2026 at 3:11:37 PM GMT+00:00
model
"anthropic/claude-4.5-sonnet-20250929"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2035
moderation_latency
230
generation_time
5787
tokens_prompt
35
tokens_completion
140
native_tokens_prompt
44
native_tokens_completion
164
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
0.002592
router
(null)
provider_responses
0
id
"c4c647f4-7f84-4bec-a525-aa3b349dadb9"
status
200
is_byok
false
latency
2034
endpoint_id
"d8bee848-f020-454a-b2be-4a7ce868f99f"
provider_name
"Amazon Bedrock"
model_permaslug
"anthropic/claude-4.5-sonnet-20250929"
api_type
"completions"
id
"gen-1770563490-EIEK1oNiUrYvRrvScmh7"
upstream_id
"c4c647f4-7f84-4bec-a525-aa3b349dadb9"
total_cost
0.002592
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Amazon Bedrock"
Evaluation details
Result
Evaluator
Details
Meta Data
100.0000%
Matches word count
n/a
neededClean
false
sentences
11
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10
10
10