Run: 2026-07-25-01KYCQQ2MNCFKAS5AZ3BZH6F16

Run Details

Duration:
41.3s
Cost:
$0.101350
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 cold rain had been falling on Marlow Hall for three days, and the gravel drive shone like wet coal. Inside, the housekeeper Agnes Pryor lit the lamps at four o'clock because the winter dark arrived early and stayed late. She counted seven faces at dinner, though only six would still be breathing when the grandfather clock struck eleven tonight. The body was discovered in the library, face down on the Turkish carpet beside an overturned decanter of good brandy. Sir Edmund Marlow had swallowed something bitter, and the doctor arrived much too late to argue about the exact cause. Agnes stood in the doorway with her ring of keys pressed hard against her palm, saying absolutely nothing at all. She had seen who carried the last glass upstairs, and she fully intended to keep that knowledge entirely for herself. Outside, the rain kept falling steadily, washing the long drive clean of every tyre track and every single hurried footprint. By morning the police would arrive, ask their careful questions, and find six people offering six identical answers already polished. One of those six answers was a lie, and Agnes Pryor was the only person in the house who knew.
created_at"2026-07-25T13:33:58.301Z" 7/25/2026, 1:33:58 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4459
moderation_latency(null)
generation_time41205
tokens_prompt46
tokens_completion878
native_tokens_prompt60
native_tokens_completion4042
native_tokens_completion_images(null)
native_tokens_reasoning577
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"
usage0.10135
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNrwxnoH48ZB3BCmPXLw"
is_byokfalse
latency1875
model_permaslug"anthropic/claude-opus-5-20260723"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1784986438-RA7dp3abSAoiMrfKS4FT"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784986438-YmLaFhCUpcKOd77Dyrvc"
upstream_id"msg_011CdNrwxnoH48ZB3BCmPXLw"
total_cost0.10135
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
sentences10
wordCounts
020
120
220
320
420
520
620
720
820
920