Model

Claude Opus 4.6

Test

N-Length Sentences

Scenario

Write sentences with 5 words each

Run ID

2026-02-08-01KGYXMD8C7GTZ1QKB1YTAJRFE

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 eerily silent. Detective Rose entered the room. Blood stained the oak floor. A body lay face down. The window was wide open. Cold wind filled the space. She knelt beside the corpse. His eyes stared at nothing. A knife was missing here. The butler watched from afar. Rain began to fall hard. No one heard him scream. Footprints led toward the garden. Someone had fled quite fast. Rose pulled out her notebook. This case would prove difficult. Every guest had some motive. The clock struck midnight sharp. Shadows danced along the walls. Murder had visited this house.
created_at"2026-02-08T15:24:02.914914+00:00" Sunday, February 8th, 2026 at 3:24:02 PM GMT+00:00
model"anthropic/claude-4.6-opus-20260205" 
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1617
moderation_latency172
generation_time4894
tokens_prompt35
tokens_completion124
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"d1b3f693-23cc-411a-aecf-b495cdbcf3b1" 
status200
is_byokfalse
latency1617
endpoint_id"a8708fb9-08ea-43bb-a3b1-165c87ef09df" 
provider_name"Amazon Bedrock" 
model_permaslug"anthropic/claude-4.6-opus-20260205" 
api_type"completions" 
id"gen-1770564236-h38Jp4YRmeiXkAhguAAD" 
upstream_id"d1b3f693-23cc-411a-aecf-b495cdbcf3b1" 
total_cost0.00362
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
sentences20
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155
165
175
185
195