Run: 2026-07-01-01KWEAF66GMYG743T44CSS0EBV

Run Details

Duration:
29.3s
Cost:
$0.039570
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 rain fell steadily against the old mansion's windows, creating dark shadows that danced silently across the cold marble floor. Detective Sarah Mitchell stood silently before the grand staircase, studying the crime scene with careful eyes and growing suspicion tonight. The body lay motionless at the bottom of the marble steps, dark blood pooling slowly on the antique Persian rug. Lord Ashford's lifeless eyes stared blankly upward, frozen in a final expression of pure raw terror and absolute total disbelief. Detective Mitchell knelt down slowly beside the body, careful not to disturb any potential evidence scattered around the crime scene.
created_at"2026-07-01T07:49:33.532Z" 7/1/2026, 7:49:33 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5122
moderation_latency(null)
generation_time29266
tokens_prompt46
tokens_completion414
native_tokens_prompt60
native_tokens_completion3945
native_tokens_completion_images(null)
native_tokens_reasoning251
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"
usage0.03957
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01YS5Mf5oqtuqiKGvUJWqDJk"
is_byokfalse
latency2991
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-1782892173-jcRhiBhLBx4fEmLjiPsG"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782892173-wBOwTiZtgnGYbwZpwfa2"
upstream_id"msg_01YS5Mf5oqtuqiKGvUJWqDJk"
total_cost0.03957
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
sentences5
wordCounts
020
120
220
320
420