Run: 2026-10-08-01M4DAEJEMVM1CWV7299E5N7NV

Run Details

Duration:
10.6s
Cost:
$0.001453
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The cold rain fell hard on Ashford Manor that night. Detective Harriet Vance stared down at the lifeless body below. Lord Edmund Blackwood lay sprawled across the cold marble floor. A single crystal glass lay shattered beside his outstretched hand. Every guest at Ashford had a reason to hate him. Vance knelt beside the body and studied the wound carefully. There was no blood, only a bruise above his ear. Someone had moved the body long after he had died. Vance looked up at the clock on the far wall. Its hands had stopped at exactly a quarter past eleven. Somebody had wanted everyone to believe the hour of death. Vance smiled grimly, because she knew the clock had lied. Behind her, the nervous young constable cleared his throat loudly. Ma'am, we have locked all the doors as you requested. Nobody leaves until I speak with every one of them. Somewhere in this grand house, a killer was silently waiting.
created_at"2026-10-08T08:35:33.467Z" 10/8/2026, 8:35:33 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency10603
moderation_latency(null)
generation_time10603
tokens_prompt46
tokens_completion228
native_tokens_prompt62
native_tokens_completion2894
native_tokens_completion_images(null)
native_tokens_reasoning2576
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"
usage0.0014532
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448533-iGcscLQTy9ga059eXu6e"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448533-oAwZ2O3EGv9UStNOM9hx"
upstream_id"msg_011CfpTro6rqNgFwXa2pCKBd"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpTro6rqNgFwXa2pCKBd"
is_byokfalse
latency785
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0014532
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
sentences16
wordCounts
010
110
210
310
410
510
610
710
810
910
1010
1110
1210
1310
1410
1510