Run: 2026-04-24-01KPZTZD5PVM20ME3240XNKVFW

Run Details

Duration:
5.6s
Cost:
$0.009175
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
80.33% 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 against the bay windows of Ravenscroft Manor as midnight approached and the grandfather clock began its mournful chime. Inspector Harold Blackwood stepped carefully across the marble foyer, his polished shoes echoing loudly through the silent, cavernous hall. The butler, pale and trembling, gestured weakly toward the library door with one gloved hand held firmly against his chest. Lord Ashworth lay sprawled beside the fireplace, a silver letter opener buried deep within his starched white dinner shirt. Seven guests huddled together near the velvet curtains, their faces betraying shock, suspicion, grief, and something else entirely unreadable. A single crystal wineglass rested on the Persian rug, its contents staining the intricate pattern a deep, ominous crimson shade. Blackwood knelt beside the body, noting the peculiar absence of struggle and the strange smile frozen on the victim's face. Someone in this room had committed murder, and every person present possessed both motive and opportunity to end Ashworth's miserable life.
created_at"2026-04-24T13:30:56.581Z" 4/24/2026, 1:30:56 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency917
moderation_latency(null)
generation_time5532
tokens_prompt46
tokens_completion265
native_tokens_prompt65
native_tokens_completion354
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"
usage0.009175
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"86eb149b-d884-491c-8905-66b3dceaa1fc"
is_byokfalse
latency917
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-1777037456-9gYAMzRKz3PGTjjJndbl"
session_id(null)
api_type"completions"
id"gen-1777037456-1HHTBQOAH2r9iGD88x7V"
upstream_id"86eb149b-d884-491c-8905-66b3dceaa1fc"
total_cost0.009175
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
80.33% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
020
119
220
319
419
520
620
721