Run: 2026-07-25-01KYCPW1EJPXX7D0RHMB7WH6HN

Run Details

Duration:
8.5s
Cost:
$0.007850
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
96.30% 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 Ashgrove Manor all that night. Detective Inspector Vera Coombes arrived just before the dawn. The front door hung open, swinging on one broken hinge. Inside, a grandfather clock had stopped precisely at eleven-thirteen. Lord Ashgrove lay face down across the library's Persian rug. A silver letter opener protruded from between his shoulder blades. Someone had arranged six white roses beside the dead man. The butler stood weeping quietly in the doorway behind her. Nine guests waited upstairs, none of them wearing dry shoes. Vera knelt and studied the wound with practiced, patient care. Whoever struck the blow had known exactly where to aim. She noticed the wine glass, wiped clean of every fingerprint. Outside, thunder rolled across the moors like distant, hungry applause. This killer had planned tonight for a very long time.
created_at"2026-07-25T13:19:12.345Z" 7/25/2026, 1:19:12 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2123
moderation_latency(null)
generation_time8405
tokens_prompt46
tokens_completion216
native_tokens_prompt60
native_tokens_completion302
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"
usage0.00785
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNqpfEYms1bsjvNiE9dg"
is_byokfalse
latency2123
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-1784985552-0oU1qbFVzqgHDgI7nNqi"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784985552-2kB3UhcbPyRpPfdbqIZw"
upstream_id"msg_011CdNqpfEYms1bsjvNiE9dg"
total_cost0.00785
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
96.30% Matches word count n/a
neededCleanfalse
sentences14
wordCounts
010
19
210
39
410
510
610
710
810
910
1010
1110
1210
1310