Run: 2026-04-24-01KPZTXCKZ5T4A7Y98T0VC7SXK

Run Details

Duration:
6.2s
Cost:
$0.008625
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
65.57% 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 the slate roof of Blackwood Manor as Inspector Hollis stepped from his car into the gathering October gloom. The front door yawned open before he reached it, revealing a pale butler whose trembling hands betrayed recent horror. Inside, candles flickered against mahogany walls, casting restless shadows across portraits of ancestors who seemed to watch him accusingly. Six guests huddled together in the drawing room, their evening clothes rumpled, their faces drained of every possible color. Lord Ashworth lay sprawled beside the fireplace, a silver letter opener buried precisely between his third and fourth ribs. No one had heard anything unusual, they claimed, though dinner had ended scarcely forty minutes before the grim discovery. Hollis removed his wet coat slowly, studying each suspect in turn while the grandfather clock struck eleven hollow times. Someone in this elegant room had committed murder, and someone, he suspected, would very soon attempt to commit another.
created_at"2026-04-24T13:29:50.476Z" 4/24/2026, 1:29:50 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1015
moderation_latency(null)
generation_time6127
tokens_prompt46
tokens_completion250
native_tokens_prompt65
native_tokens_completion332
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"
usage0.008625
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"11e7a7e0-f3c9-4e2e-9e38-6ae14dc02883"
is_byokfalse
latency1008
model_permaslug"anthropic/claude-4.7-opus-20260416"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777037390-9uYWF3bmcGC87ldtAEUa"
session_id(null)
api_type"completions"
id"gen-1777037390-u3LInY2D7AKLqUdkpGU6"
upstream_id"11e7a7e0-f3c9-4e2e-9e38-6ae14dc02883"
total_cost0.008625
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
65.57% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
020
119
219
319
419
519
619
719