Run: 2026-02-18-01KHQ944ZBRHEPJ4YNZ2SJKJ0V

Run Details

Duration:
6.2s
Cost:
$0.003822
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
37.09% 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 silent at the edge of town, its beam cutting through the thick November fog. Detective Clara Morse arrived at the scene just after midnight, her breath forming small clouds in the cold air. She stepped carefully over the threshold, noting the broken glass scattered across the worn wooden floorboards beneath her boots. A body lay face down near the spiral staircase, one arm stretched toward something nobody could yet identify. Sergeant Webb approached from behind, his flashlight sweeping slowly across the damp stone walls surrounding the terrible scene. Clara knelt beside the victim, a middle-aged man dressed in an expensive charcoal suit and polished leather shoes. There were no obvious signs of struggle, which unsettled her far more than any overturned furniture ever could. She noticed a single red rose placed deliberately beneath his outstretched hand, its petals still impossibly fresh and bright. Someone had wanted this body discovered, staged with careful intention for the first person who dared come inside. Clara stood slowly, her eyes moving upward toward the winding staircase, sensing the killer had not yet truly gone.
created_at"2026-02-18T02:26:39.78499+00:00" 2/18/2026, 2:26:39 AM
model"anthropic/claude-4.6-sonnet-20260217"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency580
moderation_latency191
generation_time5951
tokens_prompt46
tokens_completion299
native_tokens_prompt44
native_tokens_completion246
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"
usage0.003822
router(null)
provider_responses
0
id"5919f599-5c72-4caf-9d2d-5a7fd696ec1a"
status200
is_byokfalse
latency580
endpoint_id"83d802cb-44f2-45a0-a9d5-cb9bf79777c8"
provider_name"Amazon Bedrock"
model_permaslug"anthropic/claude-4.6-sonnet-20260217"
api_type"completions"
id"gen-1771381593-AjIUp4dJeOOcg6PuYAEN"
upstream_id"5919f599-5c72-4caf-9d2d-5a7fd696ec1a"
total_cost0.003822
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"

Evaluation details

Result Evaluator Details Meta Data
37.09% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
018
119
219
318
418
519
618
719
818
919