NC Bench
Overview
About
Tests
Models
Model
Claude Sonnet 4.5
Test
N-Length Sentences
Scenario
Write sentences with 10 words each
Run ID
2026-02-08-01KGYYM6K9K8YX28H7V1JTNMGK
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 fog rolled thick over Blackwood Manor's crumbling stone walls. Detective Sarah Chen stepped carefully through the heavy iron gate. Her partner, Marcus Webb, followed close behind her without speaking. They had received an urgent call at precisely midnight today. Lord Edmund Blackwood lay dead in his vast, ornate library. A single gunshot wound marked the center of his forehead. The household staff waited nervously in the cold, drafty parlor. Nobody had left the estate since discovering the grim body. Sarah noticed muddy footprints leading away from the crime scene. Ten suspects, one victim, and countless secrets filled this house.
created_at
"2026-02-08T15:41:22.89794+00:00"
Sunday, February 8th, 2026 at 3:41:22 PM GMT+00:00
model
"anthropic/claude-4.5-sonnet-20250929"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1202
moderation_latency
173
generation_time
3866
tokens_prompt
35
tokens_completion
124
native_tokens_prompt
44
native_tokens_completion
136
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
0.002172
router
(null)
provider_responses
0
id
"0caf3b51-be73-4022-b196-568b0eb5f6cc"
status
200
is_byok
false
latency
1202
endpoint_id
"d8bee848-f020-454a-b2be-4a7ce868f99f"
provider_name
"Amazon Bedrock"
model_permaslug
"anthropic/claude-4.5-sonnet-20250929"
api_type
"completions"
id
"gen-1770565278-5ENiVdCJHrd4yAWhCt86"
upstream_id
"0caf3b51-be73-4022-b196-568b0eb5f6cc"
total_cost
0.002172
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
10
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10