Run: 2026-10-08-01M4D9W8MEJAY3G42TB469KF6B

Run Details

Duration:
11.5s
Cost:
$0.001297
Provider:
Claude Platform on AWS

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 rain hammered relentlessly against the tall windows of Hollow Creek Manor while the old grandfather clock solemnly struck midnight. Inspector Eleanor Vance stood in the doorway of the study, staring at the body slumped over the cluttered mahogany desk. Lord Reginald Ashworth, the estate's wealthy and disliked owner, had been found dead barely one hour before dinner was served. Every guest in the house had a motive, and every one of them had lied about where they were tonight. Vance knelt beside the body, noticing a faint smell of bitter almonds and a broken pocket watch on the carpet. The watch had stopped at 11:47, a detail that would soon unravel the flimsy alibis of everyone under this roof.
created_at"2026-10-08T08:25:33.754Z" 10/8/2026, 8:25:33 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency10863
moderation_latency(null)
generation_time10863
tokens_prompt46
tokens_completion177
native_tokens_prompt62
native_tokens_completion2581
native_tokens_completion_images(null)
native_tokens_reasoning2334
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"
usage0.0012967
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791447934-SUtKec7e07qBVbdEoVyQ"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791447934-H4CFRJy5HVBnPrGb8INg"
upstream_id"msg_011CfpT6dadtTkS9vVknXjVh"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpT6dadtTkS9vVknXjVh"
is_byokfalse
latency945
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0012967
cache_discount(null)
upstream_inference_cost0
provider_name"Claude Platform on AWS"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
120
220
320
420
520