Run: 2026-04-24-01KQ0G01CX1WG8219CPXVH9SC6

Run Details

Duration:
17.7s
Cost:
$0.071575
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
83.33% 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
The rain hammered against the cracked windows of Ashford Manor as Detective Miriam Cole stepped carefully across the creaking threshold. A single lamp flickered beside the body, casting long, trembling shadows across the old oak floor and stained silk rug. Lord Ashford lay sprawled before the cold stone hearth, one pale hand clutching a torn letter sealed with crimson wax. Detective Miriam knelt down slowly, her gloved fingers hovering above the fatal wound, her sharp eyes cataloguing every suspicious detail. Behind her, the elderly butler cleared his throat nervously, his trembling voice barely audible over the howling winter storm outside. "Everyone in the household was present tonight, Detective, and every single one of them had a reason to despise him." Miriam rose slowly, tucking her notebook away, knowing that before dawn arrived, a killer would be hiding among these guests.
created_at"2026-04-24T19:38:17.502Z" 4/24/2026, 7:38:17 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2370
moderation_latency(null)
generation_time17414
tokens_prompt46
tokens_completion469
native_tokens_prompt65
native_tokens_completion2850
native_tokens_completion_images(null)
native_tokens_reasoning245
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"
usage0.071575
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"4bddb2e5-1ddc-4ef7-ba3b-88ff1d367921"
is_byokfalse
latency728
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-1777059497-VfFijT8rRVNXXA09AVU8"
session_id(null)
api_type"completions"
id"gen-1777059497-Q73HXgsIoUuW6jg68Rod"
upstream_id"4bddb2e5-1ddc-4ef7-ba3b-88ff1d367921"
total_cost0.071575
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
83.33% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
120
220
320
420
540