Run: 2026-04-24-01KQ0G1DCZTXYXT7BSRD8EBEEN

Run Details

Duration:
13.0s
Cost:
$0.056100
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 had been falling over Blackwood Manor for three straight days, drumming against the windows like impatient fingers. Detective Harlow Finch arrived just before dawn, her long wool coat soaked through, her boots caked with thick, unforgiving mud. The elderly butler met her at the door, his face pale as parchment, his hands trembling against the silver tray. Inside, the grand staircase spiraled upward into darkened shadow, where a single chandelier swayed gently above the polished marble floor. At the foot of the stairs lay Lord Ashcombe, his eyes open, his throat marked by a single crimson line. Harlow knelt beside the body, studying the wound, then glanced up toward the landing where twelve guests stood watching silently. One of them, she knew with absolute certainty, had quietly walked down these stairs only hours before to commit murder.
created_at"2026-04-24T19:39:02.435Z" 4/24/2026, 7:39:02 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2266
moderation_latency(null)
generation_time12949
tokens_prompt46
tokens_completion386
native_tokens_prompt65
native_tokens_completion2231
native_tokens_completion_images(null)
native_tokens_reasoning170
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"
usage0.0561
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"c101293a-d51b-402c-878b-9724e7ed29d2"
is_byokfalse
latency677
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-1777059542-bFBAHqiTUmOGQH7c3UZo"
session_id(null)
api_type"completions"
id"gen-1777059542-SPm7tGBaVZeMp6mjLRrV"
upstream_id"c101293a-d51b-402c-878b-9724e7ed29d2"
total_cost0.0561
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
sentences7
wordCounts
020
120
220
320
420
520
620