Run: 2026-10-08-01M4DANCKH2W7GRPTP3GFB7ZHX

Run Details

Duration:
8.9s
Cost:
$0.000753
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
93.44% 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 on Ashford Manor since midnight, washing the gravel paths clean of every footprint that might have mattered. Detective Inspector Eleanor Vance arrived at half past seven, her coat soaked through and her temper already frayed beyond repair. Lord Edmund Ashford lay face down beside the library fireplace, a silver letter opener protruding from between his shoulder blades. Nobody in the household admitted to hearing a scream, though three of them had been awake and wandering the corridors. Vance knelt beside the body, noting the untouched brandy, the muddy boots by the door, and the single damp glove. None of these details troubled her as much as the faint scent of lavender clinging to the dead man's collar.
created_at"2026-10-08T08:39:16.856Z" 10/8/2026, 8:39:16 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2656
moderation_latency(null)
generation_time8836
tokens_prompt46
tokens_completion455
native_tokens_prompt62
native_tokens_completion1493
native_tokens_completion_images(null)
native_tokens_reasoning1254
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"
usage0.0007527
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448756-Ag8er8B7k0RUWRejDUOM"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448756-wJxg8Ftc8vyrq5PRTYpS"
upstream_id"msg_011CfpU9G5HCUCAJqMXJp7X5"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpU9G5HCUCAJqMXJp7X5"
is_byokfalse
latency705
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0007527
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
93.44% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
021
120
220
320
420
520