Run: 2026-02-18-01KHQ9280B2C5W3YJ3Z1VA8HFR

Run Details

Duration:
6.0s
Cost:
$0.003477
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
77.28% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The old lighthouse stood alone at the edge of town, its broken light casting shadows across the wet sand. Detective Sara Voss arrived at the scene just before midnight, her boots sinking slowly into the cold mud. A body had been found face down near the rocks, one pale hand reaching toward the churning black water. She pulled out her flashlight and swept the beam across the ground, searching carefully for anything the killer left behind. The victim was a man, well dressed, perhaps fifty years old, with no wallet and no identification on him. Her partner, Grady, knelt beside the body and shook his head slowly, whispering that this felt deeply personal to him. The rain began falling harder now, threatening to wash away every last trace of evidence scattered along the shoreline tonight. Sara looked up at the lighthouse and noticed a single candle burning in the highest window, flickering against the glass. Someone had been watching, she was certain of it, and somewhere in this dark town they were still watching now.
created_at"2026-02-18T02:25:37.140182+00:00" 2/18/2026, 2:25:37 AM
model"anthropic/claude-4.6-sonnet-20260217"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency599
moderation_latency164
generation_time5763
tokens_prompt46
tokens_completion271
native_tokens_prompt44
native_tokens_completion223
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"
usage0.003477
router(null)
provider_responses
0
id"425b2428-420d-4ae6-ac12-2059e4765dbe"
status200
is_byokfalse
latency599
endpoint_id"83d802cb-44f2-45a0-a9d5-cb9bf79777c8"
provider_name"Amazon Bedrock"
model_permaslug"anthropic/claude-4.6-sonnet-20260217"
api_type"completions"
id"gen-1771381530-315OjKk6nGwPytvUQTxS"
upstream_id"425b2428-420d-4ae6-ac12-2059e4765dbe"
total_cost0.003477
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"

Evaluation details

Result Evaluator Details Meta Data
77.28% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
019
118
219
320
419
520
620
720
820