Run: 2026-02-18-01KHQ93WNJ9BV7FZX28AMVM5PK

Run Details

Duration:
7.4s
Cost:
$0.003777
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
86.88% 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 cold November shore. Nobody had visited the lighthouse keeper, Edmund Fray, for nearly three weeks, which struck his neighbor as deeply troubling. Margaret Hollis pushed open the rusted iron gate, her lantern flickering wildly against the sharp and unforgiving coastal wind. She had brought Edmund his usual Tuesday delivery of bread, salted fish, and the local paper he always loved. The door swung open before she could knock, revealing a dark hallway that smelled of copper and something far worse. Her lantern illuminated the stone floor where a single muddy boot print led toward the winding staircase above her head. Margaret called out Edmund's name twice, but only the groaning walls and the distant crashing waves answered her trembling voice. She climbed the narrow stairs slowly, gripping the cold rope railing, each wooden step crying out beneath her cautious feet. At the top, the lamp room door stood wide open, and Edmund Fray lay motionless beside his beloved brass telescope.
created_at"2026-02-18T02:26:32.218635+00:00" 2/18/2026, 2:26:32 AM
model"anthropic/claude-4.6-sonnet-20260217"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency694
moderation_latency196
generation_time6709
tokens_prompt46
tokens_completion286
native_tokens_prompt44
native_tokens_completion243
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"
usage0.003777
router(null)
provider_responses
0
id"7301567d-1cfe-4b29-abdd-1bc229b770ef"
status200
is_byokfalse
latency694
endpoint_id"83d802cb-44f2-45a0-a9d5-cb9bf79777c8"
provider_name"Amazon Bedrock"
model_permaslug"anthropic/claude-4.6-sonnet-20260217"
api_type"completions"
id"gen-1771381584-NsLBjTMznpL1ixPltV61"
upstream_id"7301567d-1cfe-4b29-abdd-1bc229b770ef"
total_cost0.003777
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"

Evaluation details

Result Evaluator Details Meta Data
86.88% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
020
119
219
319
420
520
620
720
820