Run: 2026-07-25-01KYCR2VK4RD02472PY0P2XKMS

Run Details

Duration:
18.1s
Cost:
$0.042525
Provider:
Amazon Bedrock

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 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 Hall all that night. Margaret Ellis found the body at precisely six that morning. She had come upstairs to light the fires as usual. The heavy library door stood open, which was never allowed. Inside, Sir Edmund Wrayburn lay sprawled across the writing desk. His silver fountain pen had rolled beneath the tall bookcase. A brass letter opener protruded from between his shoulder blades. Two whisky glasses stood upon the side table, both empty. Margaret did not scream, though she wanted to very badly. Instead she noticed the mantel clock had stopped at midnight. Someone had wound it wrong, or else stopped it deliberately. Eight guests slept upstairs, and one of them had lied. Margaret backed out slowly and went downstairs to fetch help. The rain kept falling, washing every footprint from the gravel.
created_at"2026-07-25T13:40:24.299Z" 7/25/2026, 1:40:24 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3936
moderation_latency(null)
generation_time18027
tokens_prompt46
tokens_completion377
native_tokens_prompt60
native_tokens_completion1689
native_tokens_completion_images(null)
native_tokens_reasoning165
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"
usage0.042525
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNsSR4PERfX7P4R92EDU"
is_byokfalse
latency1284
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-1784986824-Y1HGlL4vx5mxn5AvrWRs"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784986824-BkTmx7JT0DZQXIffQGFu"
upstream_id"msg_011CdNsSR4PERfX7P4R92EDU"
total_cost0.042525
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
100.00% Matches word count n/a
neededCleanfalse
sentences14
wordCounts
010
110
210
310
410
510
610
710
810
910
1010
1110
1210
1310