Run: 2026-07-25-01KYCPN2FQ1A4J3T3AG625ANGE

Run Details

Duration:
8.9s
Cost:
$0.008925
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
98.15% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain hammered the windows of Blackthorn House like impatient fists. Inside, the grandfather clock struck three with unusual, hollow reluctance. Detective Inspector Marlowe removed her coat and studied the room. Eleven guests sat frozen around a table set for twelve. The empty chair belonged to Sir Edmund Blackthorn, now deceased. His body lay upstairs, discovered barely forty minutes before midnight. Nobody had left the house since the storm began at dusk. Marlowe counted the faces, memorizing each nervous tic and glance. "Somebody here killed him," she said, quietly folding her gloves. The fire spat once, then settled into a guilty silence. Mrs. Hensley, the housekeeper, dropped a teacup onto the floor. Its shatter sounded impossibly loud against the drumming of rain. Marlowe smiled without warmth and pulled out the twelfth chair. "Let us begin," she murmured, "with where everyone was standing."
created_at"2026-07-25T13:15:24.031Z" 7/25/2026, 1:15:24 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1713
moderation_latency(null)
generation_time8234
tokens_prompt46
tokens_completion237
native_tokens_prompt60
native_tokens_completion345
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)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"end_turn"
service_tier"default"
usage0.008925
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNqXsDtrYTer9Lqtzt1Z"
is_byokfalse
latency1713
model_permaslug"anthropic/claude-opus-5-20260723"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1784985324-06nS18CTmnu5veZake9x"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784985324-CvgDfXy8NUOnXDc45I2V"
upstream_id"msg_011CdNqXsDtrYTer9Lqtzt1Z"
total_cost0.008925
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
98.15% Matches word count n/a
neededCleanfalse
sentences14
wordCounts
010
110
210
310
410
510
611
710
810
910
1010
1110
1210
1310