Run: 2026-07-25-01KYCPMCVEHFP3D3PZ487N62AW

Run Details

Duration:
11.0s
Cost:
$0.008125
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
94.82% 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 Blackwood Manor that October night. Detective Inspector Marlowe stepped over the threshold and removed his hat. The body lay sprawled across the library's faded Persian rug. Lord Everett Ashcombe had died with his eyes wide open. A silver letter opener protruded from beneath his left collarbone. Blood had dried into the pages of an open ledger. Marlowe crouched low and studied the dead man's clenched fist. Three strands of long blonde hair were caught between fingers. The clock on the mantel had stopped at half past eleven. Someone had wound it backward, then smashed the glass face. Outside, seven guests waited in the drawing room, saying nothing. Each of them had reason to want the old man gone. Marlowe straightened up slowly and buttoned his damp wool coat. He had until morning before the London train arrived again. Whoever killed Lord Ashcombe was still inside this locked house.
created_at"2026-07-25T13:15:02.018Z" 7/25/2026, 1:15:02 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4161
moderation_latency(null)
generation_time10753
tokens_prompt46
tokens_completion231
native_tokens_prompt60
native_tokens_completion313
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"
usage0.008125
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNqWFZm6Vns6hdd9EC2u"
is_byokfalse
latency4125
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-1784985302-pRVOrc8wiXI1tNZwg4Ve"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784985302-ZRfiia00tGHLFN8fKkWo"
upstream_id"msg_011CdNqWFZm6Vns6hdd9EC2u"
total_cost0.008125
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
94.82% Matches word count n/a
neededCleanfalse
sentences15
wordCounts
010
111
210
310
410
510
610
710
811
910
1010
1111
1210
1310
1410