Run: 2026-02-24-01KJ8VXHSMJQZPPJYNB0S4RDPR

Run Details

Duration:
1m 45s
Cost:
$0.185133
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
100.00% 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 gray manor house had been sitting quietly at the very edge of town for over a hundred years. Its crumbling stone walls were slowly being consumed by the dark green ivy that crept quietly up each shadowed side. That all changed on the cold and rainy Thursday evening when young Thomas Holt was found dead at the door. His pale cold body lay face down across the stone steps, one arm outstretched toward the heavy brass door knocker. Detective Inspector Mara Stone pushed open the creaking gate and swept her flashlight in an arc through the thick fog. She had seen dozens of crime scenes, but something about this one made the hairs on both her arms rise. The victim wore a very fine formal black suit, as though he had been dressed for an important evening event. There was no visible wound or mark upon him, and that fact made the whole terrible scene more deeply disturbing. Mara slowly crouched down beside the dead body and spotted a single dark red rose petal beneath his limp hand. She knew then that this was no ordinary death, and that someone deeply clever and very patient was watching her.
created_at"2026-02-24T22:22:05.115Z" 2/24/2026, 10:22:05 PM
model"anthropic/claude-4.6-sonnet-20260217"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency661
moderation_latency203
generation_time104368
tokens_prompt46
tokens_completion1032
native_tokens_prompt61
native_tokens_completion12330
native_tokens_completion_images(null)
native_tokens_reasoning755
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"
usage0.185133
router(null)
provider_responses
0
endpoint_id"83d802cb-44f2-45a0-a9d5-cb9bf79777c8"
id"77e33349-52d4-449d-96d0-0ce466b9124b"
is_byokfalse
latency660
model_permaslug"anthropic/claude-4.6-sonnet-20260217"
provider_name"Amazon Bedrock"
status200
api_type"completions"
id"gen-1771971725-uoLr4Vadbjz93BOzyLHn"
upstream_id"77e33349-52d4-449d-96d0-0ce466b9124b"
total_cost0.185133
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
020
120
220
320
420
520
620
720
820
920