Run: 2026-09-23-01M37PMTDQSYDBGTFARFNHNVGZ

Run Details

Duration:
14.4s
Cost:
$0.029268
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 arrived at Blackwood Manor just before midnight struck. Inside, eight guests gathered near the fireplace, sipping warm brandy. Lord Ashford stood by the window, watching lightning split clouds. His wife, Eleanor, whispered something sharp to the young butler. Nobody noticed when the old grandfather clock suddenly stopped ticking. Then every candle in the drawing room flickered and died. A woman screamed, and glass shattered somewhere in the darkness. When the lights returned, Lord Ashford lay upon the carpet. A silver letter opener protruded from his motionless, bloodied chest. Detective Mara Quinn set down her glass and sighed heavily. "Nobody leaves this room," she said, her voice perfectly calm. Outside, the storm raged on, sealing every road from town. Somewhere among these trembling guests, a killer was smiling quietly.
created_at"2026-09-23T17:57:32.744Z" 9/23/2026, 5:57:32 PM
model"anthropic/claude-opus-5.5-20260921"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5074
moderation_latency(null)
generation_time14348
tokens_prompt46
tokens_completion420
native_tokens_prompt62
native_tokens_completion1451
native_tokens_completion_images(null)
native_tokens_reasoning1150
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"
usage0.029268
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790186252-YNOHLbr31vfJ7omNx9ZE"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790186252-FcepyPhAAtgT8JdIk0vE"
upstream_id"msg_011CfLoafMoJxgu5pyUXMiBk"
provider_responses
0
endpoint_id"3a2388bc-3740-4e64-a1f5-4e301726b6b9"
id"msg_011CfLoafMoJxgu5pyUXMiBk"
is_byokfalse
latency1449
model_permaslug"anthropic/claude-opus-5.5-20260921"
provider_name"Claude Platform on AWS"
status200
total_cost0.029268
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
sentences13
wordCounts
010
110
210
310
410
510
610
710
810
910
1010
1110
1210