Run: 2026-02-24-01KJ8W6GX4TFE7NKANNBNF5GS2

Run Details

Duration:
1m 49s
Cost:
$0.184128
Provider:
Anthropic

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 rain had been falling steadily all through the long and bitterly cold night over the quiet town of Crestwood. Someone had called it in at precisely half past two, just a panicked voice reporting that there was a body. Detective Clara Finch was the first to arrive at the scene, her headlights cutting through the heavy curtain of rain. She stepped out of her car and immediately felt the cold bite of the wind against her pale tired face. The Hargrove mansion rose up behind the iron gates like something pulled directly from a very unpleasant and disturbing dream. A young uniformed officer stood at the front door, his face washed gray and his boots sunk in cold mud. Deep inside the grand entrance hall, and beneath a shattered crystal chandelier, lay the still body of Lord Edmund Hargrove. His arms were spread wide, his eyes fixed open toward the ceiling above, his mouth frozen in a silent scream. Clara had seen many crime scenes in her twelve years on the force, but none had ever felt like this. She pulled on her gloves and stepped closer, knowing already that this case would haunt her for many long years.
created_at"2026-02-24T22:26:59.119Z" 2/24/2026, 10:26:59 PM
model"anthropic/claude-4.6-sonnet-20260217"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency829
moderation_latency(null)
generation_time108503
tokens_prompt46
tokens_completion2212
native_tokens_prompt61
native_tokens_completion12263
native_tokens_completion_images(null)
native_tokens_reasoning1931
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"
usage0.184128
router(null)
provider_responses
0
endpoint_id"6d408764-7dd7-4626-bb87-a6cc1589bc86"
id"msg_01QMKbEixyrtr7wDh8qZSRNW"
is_byokfalse
latency825
model_permaslug"anthropic/claude-4.6-sonnet-20260217"
provider_name"Anthropic"
status200
api_type"completions"
id"gen-1771972019-mET7fVhxIZEin5GdITbk"
upstream_id"msg_01QMKbEixyrtr7wDh8qZSRNW"
total_cost0.184128
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"

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