Model

Claude Opus 4.6

Test

N-Length Sentences

Scenario

Write sentences with 5 words each

Run ID

2026-02-08-01KGYZRDCWDC9TR8MMWC5RGZM0

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 body lay face down. The window was wide open. Cold wind stirred the curtains. Nobody had heard any screams. Shaw knelt beside the corpse. The victim wore expensive clothes. A knife was missing nearby. His partner crossed the threshold. She carried two coffee cups. "Another long night ahead, huh?" Shaw nodded without looking up. The clock read midnight sharp. Somewhere outside a dog howled. This case already felt wrong. Too clean, too perfectly staged. Shaw trusted his gut always. Something dark was happening here.
created_at"2026-02-08T16:01:12.219748+00:00" Sunday, February 8th, 2026 at 4:01:12 PM GMT+00:00
model"anthropic/claude-4.6-opus-20260205" 
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2675
moderation_latency145
generation_time6348
tokens_prompt35
tokens_completion125
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"9b7b95a2-d21b-479c-8c8d-39241297b8c2" 
status200
is_byokfalse
latency2675
endpoint_id"a8708fb9-08ea-43bb-a3b1-165c87ef09df" 
provider_name"Amazon Bedrock" 
model_permaslug"anthropic/claude-4.6-opus-20260205" 
api_type"completions" 
id"gen-1770566464-x0r2sGjtpTHTn8dBEDIO" 
upstream_id"9b7b95a2-d21b-479c-8c8d-39241297b8c2" 
total_cost0.00362
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock" 

Evaluation details

Result Evaluator Details Meta Data
94.7368% Matches word count n/a
neededCleanfalse
sentences19
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
1210
135
145
155
165
175
185