Run: 2026-10-08-01M4DABBTTVWMYJE1XPRAXP44P

Run Details

Duration:
8.2s
Cost:
$0.000997
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 beat against the windows of Blackmoor Manor as the clock struck midnight, and nobody heard the faint scream. Detective Inspector Helen Marsh arrived at dawn, her coat soaked through, her temper already worn dangerously thin, and waiting impatiently. Lord Edmund Ashworth lay face-down in the locked library, a slender silver letter opener jutting from between his shoulder blades. Nobody had left the house all evening, or so the seven guests insisted, each one carefully avoiding the others' eyes. Marsh crouched beside the body, noticing a muddy footprint near the hearth that did not belong to any of them. Somewhere in the dark corridor, a floorboard creaked, and every head in the room turned toward the door at once.
created_at"2026-10-08T08:33:48.385Z" 10/8/2026, 8:33:48 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency8199
moderation_latency(null)
generation_time8199
tokens_prompt46
tokens_completion185
native_tokens_prompt62
native_tokens_completion1982
native_tokens_completion_images(null)
native_tokens_reasoning1724
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"
usage0.0009972
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448428-PPToXzniaDOKaXAN0DSt"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448428-YidCyf6YmO8CzyPsMukQ"
upstream_id"msg_011CfpTj3kCC6cQBosfshMTc"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpTj3kCC6cQBosfshMTc"
is_byokfalse
latency789
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0009972
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