Run: 2026-02-18-01KHQ926C5DHWE741J6KC3WCJA

Run Details

Duration:
6.3s
Cost:
$0.003702
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
21.72% 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 had stood at the edge of Dunmore Cove for nearly two hundred years without incident. Margaret Hale discovered the body just after dawn, her rubber boots sinking deep into the cold wet sand. The dead man lay face down beside the rusted iron door that led into the lighthouse base. She did not scream, which surprised her, because Margaret had always considered herself someone who would definitely scream. Instead she pulled her wool coat tighter and stared at the pale hand reaching toward the gray water. Detective Rowan Finch arrived forty minutes later, his black car cutting slowly through the thick morning coastal fog. He had seen seventeen dead bodies in his career, but something about this one felt immediately and deeply wrong. The lighthouse beam still rotated above them, casting its slow cold light across the rocky and indifferent shore. Finch crouched beside the body and noticed the small brass key clutched tightly inside the dead man's fist. Margaret watched him work and realized with a hollow certainty that she recognized the dead man's expensive brown shoes.
created_at"2026-02-18T02:25:35.500612+00:00" 2/18/2026, 2:25:35 AM
model"anthropic/claude-4.6-sonnet-20260217"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency763
moderation_latency99
generation_time6100
tokens_prompt46
tokens_completion291
native_tokens_prompt44
native_tokens_completion238
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"
usage0.003702
router(null)
provider_responses
0
id"e22804f9-fa67-42ac-8f69-4be328b9f6f4"
status200
is_byokfalse
latency762
endpoint_id"83d802cb-44f2-45a0-a9d5-cb9bf79777c8"
provider_name"Amazon Bedrock"
model_permaslug"anthropic/claude-4.6-sonnet-20260217"
api_type"completions"
id"gen-1771381528-ywRv5OcspT0eF5hegjBK"
upstream_id"e22804f9-fa67-42ac-8f69-4be328b9f6f4"
total_cost0.003702
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"

Evaluation details

Result Evaluator Details Meta Data
21.72% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
018
118
217
318
418
518
619
718
818
919