Run: 2026-07-01-01KWE925TTWSHJB56AWP80QNNQ

Run Details

Duration:
31.6s
Cost:
$0.044870
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
Rain fell steadily against the tall windows of Blackwood Manor as the old clock struck midnight in the silent hall. Detective Elena Marsh stood quietly beside the crackling fireplace, carefully studying the scattered papers on the mahogany desk before her. The lifeless body of Lord Ashford lay motionless upon the antique rug, his cold eyes staring blankly toward the ceiling. A single silver letter opener protruded from his chest, glinting faintly beneath the dim, flickering candlelight above the old desk. Elena knelt slowly beside the cold corpse, carefully noting the strange absence of any struggle, blood, or forced entry there. Only a faint, bitter scent of almonds lingered in the cold night air, hinting strongly at poison rather than blade. She rose slowly to her feet and turned toward the heavy, closed oak door, sensing someone still lingered just nearby.
created_at"2026-07-01T07:24:58.599Z" 7/1/2026, 7:24:58 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3750
moderation_latency(null)
generation_time31554
tokens_prompt46
tokens_completion464
native_tokens_prompt60
native_tokens_completion4475
native_tokens_completion_images(null)
native_tokens_reasoning246
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"
usage0.04487
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01UpFW6vgS497k3cP6h3AhQi"
is_byokfalse
latency2209
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-1782890698-a55QPn1ISUmzUpUflhRe"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782890698-XQ1gpqBtJKSSldQobjH6"
upstream_id"msg_01UpFW6vgS497k3cP6h3AhQi"
total_cost0.04487
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
sentences7
wordCounts
020
120
220
320
420
520
620