Run: 2026-07-25-01KYCPW5NJP5JDNH60ZDCY0MC8

Run Details

Duration:
12.1s
Cost:
$0.010825
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
77.07% 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 not stopped falling since Tuesday last week. Inspector Halloway stepped carefully around the puddle near the gate. Behind him, the constable held an umbrella at wrong angles. Water ran down the inspector's collar and soaked his shirt. The house ahead was tall, narrow, and painted a pale gray. Every window on the ground floor had been shuttered from inside. A woman waited at the door, hands folded, face perfectly still. "You are late," she said, though nobody had named a time. Halloway removed his hat and shook the rain onto the step. "Show me the room where you found him," he replied evenly. She turned without answering and walked into the dim front hall. The floorboards complained beneath her feet but stayed silent under his. Somewhere above them, a clock struck once for the half hour. The dead man lay beside the piano with his eyes open. Someone had folded his hands across his chest quite deliberately, neatly. Halloway crouched and looked for a long while at nothing much. "Who arranged him this way?" he asked the woman behind him. "He was like that when I came down," she said quietly. Halloway noted that she had not once looked at the body. Outside, the rain kept on falling as if paid handsomely for it.
created_at"2026-07-25T13:19:16.663Z" 7/25/2026, 1:19:16 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4342
moderation_latency(null)
generation_time12031
tokens_prompt46
tokens_completion324
native_tokens_prompt60
native_tokens_completion421
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"
usage0.010825
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNqq8EG4jhyfiffRYJNZ"
is_byokfalse
latency4294
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-1784985556-jePjL8BbFfrpycsLbqpW"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784985556-RQkP0SWFJuBUmqOJtIdB"
upstream_id"msg_011CdNqq8EG4jhyfiffRYJNZ"
total_cost0.010825
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
77.07% Matches word count n/a
neededCleanfalse
sentences20
wordCounts
010
110
210
310
411
511
611
711
811
911
1011
1111
1211
1311
1411
1511
1611
1711
1811
1912