Run: 2026-09-23-01M37PRS6TP9NAQHH8DHT0SDYT

Run Details

Duration:
15.1s
Cost:
$0.031008
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 storm had raged for three days before anyone died. Lady Margaret Ashford was found at dawn in the library. Her body lay slumped across the desk beside the window. A single candle still burned, though the wick was short. The butler screamed once, then fell silent in the doorway. Within minutes, every guest had gathered in the cold hallway. Inspector Thomas Reed pushed through the crowd without saying anything. He knelt beside the body and studied her pale hands. Her fingers were clenched tightly around a small brass key. Reed glanced up at the six faces watching him closely. The butler whispered that the door had been locked inside. No one could have entered, and no one could leave. Outside, the bridge to the village had washed away overnight. Reed stood slowly and brushed the dust from his knees. The killer, he realized, was standing in this very room.
created_at"2026-09-23T17:59:42.574Z" 9/23/2026, 5:59:42 PM
model"anthropic/claude-opus-5.5-20260921"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4216
moderation_latency(null)
generation_time15013
tokens_prompt46
tokens_completion428
native_tokens_prompt62
native_tokens_completion1538
native_tokens_completion_images(null)
native_tokens_reasoning1264
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"
usage0.031008
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790186382-ouuP2c8sSRNbImStEIq9"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790186382-xOZ3FCXMF7yhi0hQvsZu"
upstream_id"msg_011CfLokDfW8hcq2Qct9aEEn"
provider_responses
0
endpoint_id"3a2388bc-3740-4e64-a1f5-4e301726b6b9"
id"msg_011CfLokDfW8hcq2Qct9aEEn"
is_byokfalse
latency1219
model_permaslug"anthropic/claude-opus-5.5-20260921"
provider_name"Claude Platform on AWS"
status200
total_cost0.031008
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
sentences15
wordCounts
010
110
210
310
410
510
610
710
810
910
1010
1110
1210
1310
1410