Run: 2026-02-24-01KJ8VYT5KSRWGG0NNPKK2763N

Run Details

Duration:
48.1s
Cost:
$0.082533
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
100.00% 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 manor house stood silent at the edge of Millbrook, its dark windows staring out into the stormy night. Detective Clara Haines stepped carefully out of her car and pulled her long coat tight against the biting October wind. The call had come in at midnight, a frantic housekeeper screaming about blood spreading across the library's expensive Persian rug. She had seen death many times before, but something about this particular cold October night felt deeply and terribly wrong. Two uniformed officers stood guard at the heavy front door, their pale faces lit by the cold yellow flashlight glow. Inside, the old sprawling house smelled of old money, burnt candles, and something darker that Clara could not quite name. The body of Lord Edmund Ashby lay face down in the very center of the vast room, arms outstretched wide. He was still dressed for dinner, his crisp white shirt now soaked entirely through with a deep and vivid crimson. Clara crouched beside the body and noticed, almost immediately, that all the room's doors had been locked from the inside. Whoever had killed Lord Ashby had either vanished into thin air or was still hiding somewhere within the dark manor.
created_at"2026-02-24T22:22:46.461Z" 2/24/2026, 10:22:46 PM
model"anthropic/claude-4.6-sonnet-20260217"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency705
moderation_latency186
generation_time47798
tokens_prompt46
tokens_completion748
native_tokens_prompt61
native_tokens_completion5490
native_tokens_completion_images(null)
native_tokens_reasoning451
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"
usage0.082533
router(null)
provider_responses
0
endpoint_id"83d802cb-44f2-45a0-a9d5-cb9bf79777c8"
id"1d85160f-a22a-43bc-b645-362695e3ba50"
is_byokfalse
latency705
model_permaslug"anthropic/claude-4.6-sonnet-20260217"
provider_name"Amazon Bedrock"
status200
api_type"completions"
id"gen-1771971766-E1oOrRgVOKKCayRQ8Gwk"
upstream_id"1d85160f-a22a-43bc-b645-362695e3ba50"
total_cost0.082533
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
020
120
220
320
420
520
620
720
820
920