Run: 2026-07-01-01KWEADNQZG4KDYGPM0ZEXAEA1

Run Details

Duration:
5.4s
Cost:
$0.002310
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
87.15% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
# The Last Letter Rain fell hard on Tuesday. The old house stood silent. Detective Marsh climbed the steps. Blood stained the marble floor. Nobody had heard the scream. The butler found him first. His hands shook while calling. "Come quickly, there's been murder." Marsh examined the still body. The victim clutched a letter. Ink smeared across the page. Three words remained quite legible. "Tell her I knew." Marsh frowned at the message. Who was she, he wondered. The mansion held many secrets. Twelve guests slept upstairs still. One of them was guilty. Marsh straightened his damp coat. This would be a long night.
created_at"2026-07-01T07:48:43.914Z" 7/1/2026, 7:48:43 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1720
moderation_latency(null)
generation_time5381
tokens_prompt46
tokens_completion157
native_tokens_prompt60
native_tokens_completion219
native_tokens_completion_images(null)
native_tokens_reasoning0
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"
usage0.00231
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01F41jgXRa2WujbRVgGkXAqo"
is_byokfalse
latency1699
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-1782892123-8PnVrageMDvLqcPce0Bu"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782892123-7Y4q1qxIqp0hYKAGQnOC"
upstream_id"msg_01F41jgXRa2WujbRVgGkXAqo"
total_cost0.00231
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
87.15% Matches word count n/a
neededCleanfalse
sentences19
wordCounts
04
15
25
35
45
55
65
75
810
95
105
115
129
135
145
155
165
175
186