Run: 2026-02-18-01KHQ94DFFT825B3S3E7W3B85B

Run Details

Duration:
5.6s
Cost:
$0.003417
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
34.48% 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 at the edge of town, its beam cutting through the thick autumn fog relentlessly. Detective Clara Marsh arrived at the scene just after midnight, her boots crunching softly on the wet gravel. A body had been found slumped against the rusty iron door, one hand clutching a torn photograph tightly. The victim was a man in his fifties, well dressed, with no obvious signs of struggle anywhere nearby. Clara pulled on her gloves and knelt beside him, studying his pale face with quiet, methodical professional focus. Her partner, Officer Reed, stood behind her scribbling notes into a small weathered notebook he always carried with him. The lighthouse keeper claimed he had heard nothing unusual, though his nervous eyes suggested a very different story entirely. Waves crashed loudly against the rocks below as Clara noticed a single gold ring missing from his right hand. Someone had been here before them, that much was certain, and they had taken something important deliberately away tonight.
created_at"2026-02-18T02:26:47.775797+00:00" 2/18/2026, 2:26:47 AM
model"anthropic/claude-4.6-sonnet-20260217"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency650
moderation_latency162
generation_time5326
tokens_prompt46
tokens_completion269
native_tokens_prompt44
native_tokens_completion219
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"
usage0.003417
router(null)
provider_responses
0
id"101229e4-7149-48ea-a1e8-dcdb72775757"
status200
is_byokfalse
latency650
endpoint_id"83d802cb-44f2-45a0-a9d5-cb9bf79777c8"
provider_name"Amazon Bedrock"
model_permaslug"anthropic/claude-4.6-sonnet-20260217"
api_type"completions"
id"gen-1771381601-FLxk8hxqKRXGIOc1GclS"
upstream_id"101229e4-7149-48ea-a1e8-dcdb72775757"
total_cost0.003417
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"

Evaluation details

Result Evaluator Details Meta Data
34.48% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
018
118
218
318
418
519
619
719
819