Run: 2026-04-24-01KPZV1J8K09B2S5D1JCA5TC4N

Run Details

Duration:
6.3s
Cost:
$0.009325
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
72.91% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 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 Blackwood Manor as Detective Marlowe stepped from his car into the gathering October storm. The wrought iron gates had been left open, which the butler mentioned was strictly against the late master's orders. Inside, seven guests waited in the drawing room, each clutching a glass of brandy with hands that trembled noticeably. Lord Ashcroft lay sprawled across the Persian rug, a silver letter opener buried deep between his shoulder blades. The grandfather clock in the corner had stopped at precisely eleven seventeen, which everyone agreed was the moment of death. Marlowe removed his dripping coat and studied each face in turn, noting the subtle flickers of fear and calculation. Someone in this room had committed murder, and that someone was currently pretending to mourn alongside the other innocent guests. The French windows stood locked from the inside, the only key dangling from the victim's own waistcoat pocket chain. Marlowe smiled grimly to himself because impossible crimes were precisely the sort of puzzle he had traveled here to solve.
created_at"2026-04-24T13:32:07.33Z" 4/24/2026, 1:32:07 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1430
moderation_latency(null)
generation_time6070
tokens_prompt46
tokens_completion273
native_tokens_prompt65
native_tokens_completion360
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"
usage0.009325
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"3733cb64-6423-4cba-a7a6-cfbf38e10391"
is_byokfalse
latency1430
model_permaslug"anthropic/claude-4.7-opus-20260416"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777037527-7aOP3JIgzpEWqitTGRBb"
session_id(null)
api_type"completions"
id"gen-1777037527-Dhw8TqZMthRMnWSE0S0A"
upstream_id"3733cb64-6423-4cba-a7a6-cfbf38e10391"
total_cost0.009325
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
72.91% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
020
119
219
318
420
519
620
719
820