Run: 2026-10-08-01M4DAMQME52VMCE5S8A8VT7K9

Run Details

Duration:
10.0s
Cost:
$0.001236
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 midnight, washing the cobbled courtyard into a dark and restless mirror. Inspector Eleanor Vance stood beneath the dripping eaves, her collar turned up against a cold wind that smelled of woodsmoke. Behind her, the great oak doors stood open, spilling yellow lamplight across the wet stones where the body had lain. Sergeant Thomas Hale hovered at her elbow, notebook clutched in gloved hands, his face unusually pale beneath the constable's umbrella. Lord Gregory Ashford had been found at the foot of the east staircase, his neck bent at an impossible angle. Nobody in the household admitted hearing a sound, which Vance found more interesting than any scream could possibly have been. She made a note, underlined it twice, and quietly wondered which of the nine guests in that house was lying.
created_at"2026-10-08T08:38:55.382Z" 10/8/2026, 8:38:55 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency9974
moderation_latency(null)
generation_time9974
tokens_prompt46
tokens_completion212
native_tokens_prompt62
native_tokens_completion2460
native_tokens_completion_images(null)
native_tokens_reasoning2168
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"
usage0.0012362
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448735-wZJZiKnDzIITPuhulWv0"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448735-2NcNLhAn1JWKnxXeNF13"
upstream_id"msg_011CfpU7gCnwsMHt6cntAai7"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpU7gCnwsMHt6cntAai7"
is_byokfalse
latency699
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0012362
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