Run: 2026-07-25-01KYCRJ63T7BRD747HB3QBF9TG

Run Details

Duration:
18.3s
Cost:
$0.041350
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
72.60% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The rain had washed the gravel drive clean by dawn. Inspector Marlowe parked beside the fountain and killed the engine. Ravenscourt House loomed above him, all wet stone and silence. A constable waited at the door, hat clutched in hands. The young man's face had gone the color of ash. "Library, sir," he said. "Nobody has touched anything since seven." Marlowe wiped his shoes and stepped into the warm hall. Somewhere upstairs a woman was weeping without any real conviction. The library smelled of brandy, book dust, and cold iron. Lord Ravenscourt sat in his chair, facing the tall windows. Someone had driven a letter opener through his starched collar. His right hand still held a pen above blank paper. Marlowe crouched, studying the neat wound and the untouched glass. The man had not struggled, had not even stood up. "He knew them," Marlowe murmured, "and he trusted them completely." Behind him, the constable finally asked who should be woken. Marlowe rose slowly and looked at the ceiling above them. "Everyone," he said. "One of them will lie to me."
created_at"2026-07-25T13:48:46.596Z" 7/25/2026, 1:48:46 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3928
moderation_latency(null)
generation_time18185
tokens_prompt46
tokens_completion446
native_tokens_prompt60
native_tokens_completion1642
native_tokens_completion_images(null)
native_tokens_reasoning177
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"
usage0.04135
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNt5SN3VT4kKkczcGF57"
is_byokfalse
latency1275
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-1784987326-wELiBGh7PtQ5SmXihi85"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784987326-P016MN6MKCesUmszUsD4"
upstream_id"msg_011CdNt5SN3VT4kKkczcGF57"
total_cost0.04135
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
72.60% Matches word count n/a
neededCleanfalse
sentences18
wordCounts
010
110
210
310
410
54
616
710
810
910
1010
1110
1210
1310
1420
1510
163
177