Run: 2026-04-24-01KQ0G9HCT03AEYMRJ3X57P1QA

Run Details

Duration:
20.7s
Cost:
$0.102725
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 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The cold rain hammered furiously against the tall windows of Ashcombe Manor as Detective Inspector Margaret Hollis stepped carefully inside. A solitary candle still burned low upon the polished mahogany table, flickering weakly beside a nearly empty glass of claret. Lord Ashcombe himself lay slumped across his worn leather armchair, with one pale hand still clutching a crumpled, bloodstained letter. Margaret knelt slowly beside the cooling body, her trained eyes sweeping across the scene for any detail that seemed unusual. Outside, the thunder cracked violently overhead, and somewhere within the darkened house, a floorboard creaked beneath a very careful footstep. Margaret's gloved hand drifted slowly toward the revolver at her hip as she realized the killer had never actually left.
created_at"2026-04-24T19:43:28.669Z" 4/24/2026, 7:43:28 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2268
moderation_latency(null)
generation_time20684
tokens_prompt46
tokens_completion516
native_tokens_prompt65
native_tokens_completion4096
native_tokens_completion_images(null)
native_tokens_reasoning317
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"
usage0.102725
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"f97416b3-4ecf-4c81-bafa-8022fe8a8619"
is_byokfalse
latency901
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-1777059808-NpSzEuEmxsMXAvvi2hwN"
session_id(null)
api_type"completions"
id"gen-1777059808-pP02Y1ex95CPkqJjEBc1"
upstream_id"f97416b3-4ecf-4c81-bafa-8022fe8a8619"
total_cost0.102725
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
120
220
320
420
520