Run: 2026-07-01-01KWE972MQP72G3TFXKSZGTC9V

Run Details

Duration:
46.4s
Cost:
$0.064330
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 old mansion stood eerily silent beneath a heavy gray sky, cold rain hammering steadily against its ancient glass windows. Detective Sarah Chen stepped carefully through the grand entrance, her flashlight cutting slowly through the thick musty darkness before her. A body lay motionless at the base of the grand sweeping marble staircase, dark blood pooling slowly across the floor. Sarah immediately recognized the fallen victim as Charles Whitmore, the reclusive millionaire who had owned this vast, isolated grand estate. Three nervous suspects waited quietly in the adjacent study, each one completely avoiding the detective's own probing, suspicious, sharp gaze. Somewhere within these cold, silent stone walls, Sarah knew, the killer patiently waited for her very next single wrong move.
created_at"2026-07-01T07:27:39.173Z" 7/1/2026, 7:27:39 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3846
moderation_latency(null)
generation_time46322
tokens_prompt46
tokens_completion654
native_tokens_prompt60
native_tokens_completion6421
native_tokens_completion_images(null)
native_tokens_reasoning455
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"
usage0.06433
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_013n6yaZS4xH7fEj8vh6riC4"
is_byokfalse
latency1803
model_permaslug"anthropic/claude-sonnet-5-20260630"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.17.0; linux; x64))"
http_referer(null)
request_id"req-1782890859-CcqVHNY1CHfPL4bAOI6I"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782890859-U8p8x8XbVnZZw9Ul46NW"
upstream_id"msg_013n6yaZS4xH7fEj8vh6riC4"
total_cost0.06433
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
100.00% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
120
220
320
420
520