Run: 2026-10-09-01M4G0WS3ME21BG9F6FCFZ2XK2

Run Details

Duration:
12.5s
Cost:
$0.001206
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 over Ashford Manor since dawn, washing the gravel paths grey and turning the lawns to mud. Inspector Eleanor Marsh arrived at half past seven, her coat dripping onto the polished hallway floor beside a trembling constable. Lord Harold Ashford lay motionless and sprawled beside the cold library fireplace, a silver letter opener protruding from his chest. Nobody in the sprawling household admitted hearing a single sound, though every one of them had been painfully wide awake. Marsh crouched beside the body, noting the dried blood, the overturned chair, and the single muddy footprint near the window. Whoever had killed Lord Ashford had walked through the house with ease, and that troubled her deeply as she rose.
created_at"2026-10-09T09:46:16.57Z" 10/9/2026, 9:46:16 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2679
moderation_latency(null)
generation_time12454
tokens_prompt46
tokens_completion472
native_tokens_prompt62
native_tokens_completion2400
native_tokens_completion_images(null)
native_tokens_reasoning2149
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"
usage0.0012062
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791539176-47yfhc95fYG74w58BKqJ"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791539176-FhdQiBNeuIKtmAjsW6vL"
upstream_id"msg_011CfrT4VQU41bfct7CrBrnk"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfrT4VQU41bfct7CrBrnk"
is_byokfalse
latency783
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0012062
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