Run: 2026-07-25-01KYCPMGC7TJE1YHC6GD21BAXY

Run Details

Duration:
6.5s
Cost:
$0.006900
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
88.22% 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
The rain had not stopped falling since Tuesday last week. Inspector Marlowe Vance stepped over the threshold and removed her hat. Blood pooled beneath the grand piano in slow, widening circles. Lord Ashcombe lay face down across the ivory keys, motionless. Seven guests waited in the drawing room, none of them speaking. The butler had discovered the body at precisely half past ten. Nobody had heard a gunshot, though everybody claimed perfect hearing. Vance knelt and studied the dead man's oddly clean right hand. A single black glove rested on the windowsill, damp and abandoned. Outside, the gravel drive held no tire tracks or footprints. "Whoever killed him," Vance murmured quietly, "never left this house."
created_at"2026-07-25T13:15:05.486Z" 7/25/2026, 1:15:05 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1721
moderation_latency(null)
generation_time6397
tokens_prompt46
tokens_completion187
native_tokens_prompt60
native_tokens_completion264
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"
usage0.0069
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNqWTwQ1q4eFwNqaH3Kq"
is_byokfalse
latency1721
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-1784985305-fjCG7bxI40AO5S7Yibjn"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784985305-6yeZpHBvZZA4wfCNh324"
upstream_id"msg_011CdNqWTwQ1q4eFwNqaH3Kq"
total_cost0.0069
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
88.22% Matches word count n/a
neededCleanfalse
sentences11
wordCounts
010
111
210
310
411
511
610
711
811
910
1010