Model

Claude Opus 4.6

Test

N-Length Sentences

Scenario

Write sentences with 5 words each

Run ID

2026-02-08-01KGYXX1HS6SPSKWPTDES4K39Y

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 out his notebook. The victim wore expensive jewelry. Nothing appeared to be stolen. Someone had wanted her dead. A clock struck midnight loudly. Shaw examined her pale hands. Bruises circled her thin neck. She had struggled quite hard. A glass sat nearby empty. Poison could not be excluded. The room smelled of perfume. Something felt very deeply wrong. He noticed a torn photograph. Two faces had been removed. Only the frame still remained. Shaw called his young partner. They had work to do.
created_at"2026-02-08T15:28:46.492721+00:00" Sunday, February 8th, 2026 at 3:28:46 PM GMT+00:00
model"anthropic/claude-4.6-opus-20260205" 
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1498
moderation_latency159
generation_time6394
tokens_prompt35
tokens_completion165
native_tokens_prompt44
native_tokens_completion176
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" 
usage0.00462
router(null)
provider_responses
0
id"9e628caa-e9a9-4059-a835-80f10ff06b15" 
status200
is_byokfalse
latency1492
endpoint_id"a8708fb9-08ea-43bb-a3b1-165c87ef09df" 
provider_name"Amazon Bedrock" 
model_permaslug"anthropic/claude-4.6-opus-20260205" 
api_type"completions" 
id"gen-1770564519-9p8PgsEc57Uqpyw1aw2o" 
upstream_id"9e628caa-e9a9-4059-a835-80f10ff06b15" 
total_cost0.00462
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock" 

Evaluation details

Result Evaluator Details Meta Data
100.0000% Matches word count n/a
neededCleanfalse
sentences27
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155
165
175
185
195
205
215
225
235
245
255
265