Run: 2026-10-09-01M4FXHCZ7XDK4S2V34H3JZ0TT

Run Details

Duration:
12.2s
Cost:
$0.001268
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 had been falling over Ashford Manor since dawn, and nobody in the household had slept well that night. Detective Inspector Harold Finch arrived at half past seven, carrying an umbrella and a grim expression that suggested serious trouble. Lord Edmund Ashford lay motionless beside the library fireplace, a silver letter opener protruding from his chest like an accusation. Nobody had touched the body, according to the maid, who had screamed loudly enough to wake the entire sleepy village. Finch knelt beside the victim, noting the untouched teacup, the muddy boot prints, and the open window facing the gardens. Somewhere in this house, a killer had remained calm enough to tidy the study before the first light of dawn. Finch looked up at the assembled suspects and felt the familiar chill of certainty settle deep within his weary heart.
created_at"2026-10-09T08:47:38.171Z" 10/9/2026, 8:47:38 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2473
moderation_latency(null)
generation_time11953
tokens_prompt46
tokens_completion502
native_tokens_prompt62
native_tokens_completion2524
native_tokens_completion_images(null)
native_tokens_reasoning2245
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"
usage0.0012682
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791535658-T19EYLlqPuHNdwBfkpsn"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791535658-kUkdlaTpE7N6YNygJ56W"
upstream_id"msg_011CfrNb8n1tQZid43eUF1YA"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfrNb8n1tQZid43eUF1YA"
is_byokfalse
latency841
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0012682
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
sentences7
wordCounts
020
120
220
320
420
520
620