Run: 2026-07-25-01KYCQQPSBG6F819SA9RKXDDAC

Run Details

Duration:
33.6s
Cost:
$0.080225
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
90.00% 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 rain had been falling on Ashgrove Manor since midnight, and by dawn the gravel drive resembled a shallow river. Inspector Halloran parked beside the fountain, turned off the engine, and sat listening to water drumming against the car roof. A young constable waited under the portico, hatless, pale, holding an umbrella that the wind had already turned inside out. "She's in the library, sir," he said, "and nobody has touched her, though the housekeeper wanted to cover her face." Halloran nodded, wiped rain from his eyes, and followed the boy through doors of oak into the cold echoing hall. Fourteen guests had come for the weekend shooting party, and every one of them now stood accused by the silence. Lady Marchmont lay across the Persian carpet with her arms flung wide, as though welcoming home an unexpected late guest. The letter opener between her ribs bore the Marchmont crest, and the fire had burned itself down to grey embers. Rain hammered the tall windows like impatient knuckles, and the great old house seemed to hold its breath and wait. Halloran crouched, studied the clean edges of the wound, and understood at once that this particular killer had not hesitated. Somewhere above him a floorboard creaked, and he thought, quite calmly: one of you is still awake and still listening.
created_at"2026-07-25T13:34:18.931Z" 7/25/2026, 1:34:18 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4576
moderation_latency(null)
generation_time33429
tokens_prompt46
tokens_completion682
native_tokens_prompt60
native_tokens_completion3197
native_tokens_completion_images(null)
native_tokens_reasoning355
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"
usage0.080225
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNryV3zRZW83JkhMmNcw"
is_byokfalse
latency1573
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-1784986458-P5tJ7iZzYht8gMOlesua"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784986458-oAoBsuIyRSwRiBSVTEbD"
upstream_id"msg_011CdNryV3zRZW83JkhMmNcw"
total_cost0.080225
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
90.00% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
020
120
220
340
420
520
620
720
820
920