Run: 2026-10-08-01M4DA1B5WKE9CD0569TGACMT2

Run Details

Duration:
7.8s
Cost:
$0.000955
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 rain hammered relentlessly against the manor windows that night. Inspector Harriet Vance stood motionless in the cold grand foyer. Somewhere high above her, a heavy oak door slammed shut. Lord Ashford lay dead in his locked study before midnight. Nobody had entered or left that room since dinner ended. Harriet pulled on her gloves and stepped over the threshold. The air inside smelled of brandy, wet wool, and fear. Her eyes moved across the scattered papers on the desk. Something about the scene felt utterly staged and deeply wrong. Then the hallway clock stopped ticking abruptly, leaving silence behind.
created_at"2026-10-08T08:28:20.037Z" 10/8/2026, 8:28:20 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency7792
moderation_latency(null)
generation_time7792
tokens_prompt46
tokens_completion154
native_tokens_prompt62
native_tokens_completion1897
native_tokens_completion_images(null)
native_tokens_reasoning1678
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"
usage0.0009547
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448100-UOtqC2yDcOChFSbSkUBV"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448100-At2LONraXXlNB0x4xPed"
upstream_id"msg_011CfpTJqyrK2d5z33THdDa2"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpTJqyrK2d5z33THdDa2"
is_byokfalse
latency799
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0009547
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
sentences10
wordCounts
010
110
210
310
410
510
610
710
810
910