Run: 2026-07-25-01KYCPTF0QZB8997NXQZXP40V2

Run Details

Duration:
6.9s
Cost:
$0.007575
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
95.68% 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 slate roof of Thornbury Hall all night. Constable Ellis Vane arrived at precisely seven in the morning. The front door stood open, swollen wood scraping wet stone. Inside, a grandfather clock ticked against the silence like accusation. Lady Margery Thornbury lay sprawled across the library's Persian carpet. Her left hand clutched a torn page of yellowed sheet music. Blood had dried around a brass letter opener's ornate handle. Vane crouched, noting the absence of any struggle whatsoever nearby. Seven crystal glasses waited on the sideboard, six of them used. Someone had rearranged the chairs into a careful, deliberate circle. Outside, six houseguests watched from the terrace, saying absolutely nothing. Vane wondered which of them had already decided to lie.
created_at"2026-07-25T13:18:20.701Z" 7/25/2026, 1:18:20 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1631
moderation_latency(null)
generation_time6818
tokens_prompt46
tokens_completion205
native_tokens_prompt60
native_tokens_completion291
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"
usage0.007575
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNqkrA1rhB1k5qKEv32w"
is_byokfalse
latency1631
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-1784985500-xOw9yHvVpWdl0EUUTlaa"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784985500-8mkpb5DUu2Bq6fLZJDwh"
upstream_id"msg_011CdNqkrA1rhB1k5qKEv32w"
total_cost0.007575
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
95.68% Matches word count n/a
neededCleanfalse
sentences12
wordCounts
010
110
210
310
410
511
610
710
811
910
1010
1110