Run: 2026-07-01-01KWEA9GW4FQ3E99ETAY65KN4E

Run Details

Duration:
16.9s
Cost:
$0.020450
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 hammered relentlessly against the old manor's windows as Detective Sarah Chen crept carefully through the long, darkened, silent hallway. The lifeless body lay motionless beneath the grand staircase, surrounded completely by broken glass and scattered papers from the desk. Chen knelt slowly beside the victim, noting the peculiar bruising pattern that suggested a struggle before the final, fatal blow. Something about this entire crime scene felt wrong, staged even, as if someone truly wanted her to find it quickly. She stood up slowly, scanning the entire room for anything the local police might have overlooked or simply dismissed entirely.
created_at"2026-07-01T07:46:27.853Z" 7/1/2026, 7:46:27 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4114
moderation_latency(null)
generation_time16893
tokens_prompt46
tokens_completion291
native_tokens_prompt60
native_tokens_completion2033
native_tokens_completion_images(null)
native_tokens_reasoning128
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"
usage0.02045
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01ALsjmCLAuBMf95BeJbhv9J"
is_byokfalse
latency1472
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-1782891987-7YQvAoTfqGIrO4SHbeSZ"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782891987-WNzs7EH0PrdlfECL8dZN"
upstream_id"msg_01ALsjmCLAuBMf95BeJbhv9J"
total_cost0.02045
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