Model

Claude Haiku 4.5

Test

N-Length Sentences

Scenario

Write sentences with 10 words each

Run ID

2026-02-08-01KGYX84GMM3G657681PRMRJ2G

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

AI
# The Midnight Discovery The body lay cold upon the polished marble floor. Detective Sarah Chen examined the scene with practiced, careful eyes. The victim wore an expensive suit, now stained dark red. No signs of forced entry marred the locked penthouse door. A crystal glass lay shattered near the corpse's outstretched hand. The room smelled faintly of expensive perfume and something else. Three people claimed to be in the building that night. Each suspect possessed both motive and opportunity for this crime. Chen knew the killer stood somewhere among these gathered witnesses. The game of deception was about to begin its course.
created_at"2026-02-08T15:17:17.554344+00:00" Sunday, February 8th, 2026 at 3:17:17 PM GMT+00:00
model"anthropic/claude-4.5-haiku-20251001" 
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1285
moderation_latency134
generation_time2355
tokens_prompt35
tokens_completion122
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" 
usage0.000724
router(null)
provider_responses
0
id"50fcafbc-bf6a-4d96-a60b-2afc237a1c5a" 
status200
is_byokfalse
latency1126
endpoint_id"d000261c-5aeb-47d1-ac87-ad64dbe1cdb6" 
provider_name"Amazon Bedrock" 
model_permaslug"anthropic/claude-4.5-haiku-20251001" 
api_type"completions" 
id"gen-1770563834-oIXxZw8SLDDupPwoaO89" 
upstream_id"50fcafbc-bf6a-4d96-a60b-2afc237a1c5a" 
total_cost0.000724
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock" 

Evaluation details

Result Evaluator Details Meta Data
88.5531% Matches word count n/a
neededCleanfalse
sentences11
wordCounts
04
19
210
310
410
510
610
710
810
910
1010