Run: 2026-02-18-01KHQ92G8JJ6ZGBD09Q0A7JYMD

Run Details

Duration:
6.4s
Cost:
$0.004062
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
27.67% 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 keeper discovered the body just before dawn, when pale light crept across the frozen harbor below. Nobody in the small coastal town had expected violence to shatter their quiet lives on such a morning. Margaret Holloway lay face down on the wet rocks, her silver hair splayed like seaweed around her head. Detective Silas Crane arrived within minutes, his boots crunching over gravel as cold wind tore through his coat. He had seen death before, many times, but something about this scene made his stomach tighten with dread. The lighthouse beam continued its slow rotation above, indifferently casting long shadows across the woman's motionless, frost-covered body. A single red glove rested near her outstretched hand, clearly belonging to someone other than the dead woman. Silas crouched down carefully, studying every detail without touching anything, knowing that evidence here could vanish without warning. The keeper, old Thomas Briggs, stood trembling nearby, clutching his lantern as though it might somehow protect him still. Someone in this town had committed an unforgivable act, and Silas was determined to find out exactly who.
created_at"2026-02-18T02:25:46.210773+00:00" 2/18/2026, 2:25:46 AM
model"anthropic/claude-4.6-sonnet-20260217"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency745
moderation_latency203
generation_time6085
tokens_prompt46
tokens_completion297
native_tokens_prompt44
native_tokens_completion262
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"
usage0.004062
router(null)
provider_responses
0
id"f73589f7-94a3-4236-8f21-3a41aeda3b12"
status200
is_byokfalse
latency741
endpoint_id"83d802cb-44f2-45a0-a9d5-cb9bf79777c8"
provider_name"Amazon Bedrock"
model_permaslug"anthropic/claude-4.6-sonnet-20260217"
api_type"completions"
id"gen-1771381539-umnaAKeG14t10eF1SNlx"
upstream_id"f73589f7-94a3-4236-8f21-3a41aeda3b12"
total_cost0.004062
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"

Evaluation details

Result Evaluator Details Meta Data
27.67% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
019
118
218
318
418
519
618
718
819
918