Run: 2026-10-08-01M4DAJMC8YN6PQ8YXCEWRMG76

Run Details

Duration:
9.2s
Cost:
$0.001019
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 fallen across Blackwood Manor since midnight, washing the gravel paths clean of every single footprint before dawn. Detective Inspector Harriet Vane arrived at the estate just after seven, her coat soaked and her temper already frayed badly. Lord Edmund Ashcombe lay face down in his library, a silver letter opener protruding from between his narrow shoulder blades. The constable at the scene, a nervous young man named Pike, insisted that nobody had entered or left since nine. Harriet knelt beside the body, noticing a faint smear of ink on the victim's right cuff that nobody had mentioned. Somewhere in the house, a clock chimed eleven times, and every guest in the drawing room fell silent at once. Harriet looked up slowly, and she knew with absolute certainty that one of them was lying to her face tonight.
created_at"2026-10-08T08:37:46.512Z" 10/8/2026, 8:37:46 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2893
moderation_latency(null)
generation_time9154
tokens_prompt46
tokens_completion383
native_tokens_prompt62
native_tokens_completion2026
native_tokens_completion_images(null)
native_tokens_reasoning1745
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"
usage0.0010192
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448666-lKMfngMIRmlpk4NbnHaQ"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448666-Q8oIm0HCikmPadtO0lvL"
upstream_id"msg_011CfpU2cH1Y42ZGByaohfd2"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpU2cH1Y42ZGByaohfd2"
is_byokfalse
latency763
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0010192
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