Run: 2026-09-23-01M37PJPAYD7X6B6ND30PWQYD6

Run Details

Duration:
17.2s
Cost:
$0.034028
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 over Blackwood Manor since early evening. Inside, the guests gathered near the fire, sipping warm brandy. Lord Ashworth had summoned them all with an urgent letter. Yet their host had not appeared since the dinner bell. Margaret, his niece, paced nervously beside the tall bay window. Colonel Hastings checked his pocket watch for the third time. Suddenly, a piercing scream echoed down the long east corridor. Everyone froze, their glasses suspended halfway between table and lips. The young maid, Elsie, stumbled into the room, trembling violently. "He is dead," she whispered, pointing toward the dark study. They rushed down the hallway, candles flickering against the walls. Lord Ashworth lay slumped across his desk, eyes wide open. A silver letter opener protruded from between his shoulder blades. The window was latched, the key still inside the lock. Somewhere in this house, a murderer was watching them all.
created_at"2026-09-23T17:56:23.027Z" 9/23/2026, 5:56:23 PM
model"anthropic/claude-opus-5.5-20260921"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4338
moderation_latency(null)
generation_time17147
tokens_prompt46
tokens_completion437
native_tokens_prompt62
native_tokens_completion1689
native_tokens_completion_images(null)
native_tokens_reasoning1367
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"
usage0.034028
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790186183-zvrjYWh1WxmYB8gR0mIH"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790186183-UOXtzRaHxJ5OdlD2yUJl"
upstream_id"msg_011CfLoVWgGkBPp2yExvVyQa"
provider_responses
0
endpoint_id"3a2388bc-3740-4e64-a1f5-4e301726b6b9"
id"msg_011CfLoVWgGkBPp2yExvVyQa"
is_byokfalse
latency1205
model_permaslug"anthropic/claude-opus-5.5-20260921"
provider_name"Claude Platform on AWS"
status200
total_cost0.034028
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