Model

Claude Opus 4.6

Test

N-Length Sentences

Scenario

Write sentences with 5 words each

Run ID

2026-02-08-01KGYY7AYE6DRP5R790VT9GSMC

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 rain fell without mercy. Detective Shaw entered the room. Blood stained the white carpet. A woman lay there dead. Her eyes stared at nothing. The window was wide open. Cold wind moved the curtains. Shaw knelt beside the body. No weapon could be found. This case would be difficult. He pulled on latex gloves. The victim wore expensive jewelry. Nothing appeared to be stolen. Someone had wanted her dead. A clock struck midnight softly. Shaw noticed bruises on her neck. The maid had found her first. She was sobbing downstairs now. Neighbors claimed they heard nothing. But someone knew the truth.
created_at"2026-02-08T15:34:21.909823+00:00" Sunday, February 8th, 2026 at 3:34:21 PM GMT+00:00
model"anthropic/claude-4.6-opus-20260205" 
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1225
moderation_latency159
generation_time4314
tokens_prompt35
tokens_completion126
native_tokens_prompt44
native_tokens_completion136
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" 
usage0.00362
router(null)
provider_responses
0
id"a96a6420-9c29-473a-bc0f-dab0fcc61864" 
status200
is_byokfalse
latency1224
endpoint_id"a8708fb9-08ea-43bb-a3b1-165c87ef09df" 
provider_name"Amazon Bedrock" 
model_permaslug"anthropic/claude-4.6-opus-20260205" 
api_type"completions" 
id"gen-1770564856-4i78A1ZjQz28uqhWQ2hN" 
upstream_id"a96a6420-9c29-473a-bc0f-dab0fcc61864" 
total_cost0.00362
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock" 

Evaluation details

Result Evaluator Details Meta Data
97.7880% Matches word count n/a
neededCleanfalse
sentences20
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135
145
156
166
175
185
195