Run: 2026-10-08-01M4DYKEV53E53EHSFRN0R0ZXX

Run Details

Duration:
3m 7s
Cost:
$0.024839
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
95.45% 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 had not stopped falling since early Tuesday evening. Detective Mercer stood beneath the flickering lamp outside Ashgrove Manor. She pulled her collar higher and counted the dark windows. Somewhere inside, a dog barked twice and then fell silent. Constable Reid met her at the door, his face pale. Portraits of stern ancestors watched them from the corridor walls. A woman in grey silk waited motionless on the stairs. Reid swallowed hard, then whispered, "Nobody has moved him yet." The library smelled of cold cigars and something sharper beneath. Edmund Vane lay slumped across his desk, one hand outstretched. A fire had burned down to embers in the grate. Only one teacup rested on the tray beside the decanter. A second saucer sat empty beside it, its cup missing. Mercer crouched beside the body and noticed the stained fingertips. Dark ink had bled into the creases of his skin. An uncapped pen lay beside an unfinished letter to Ruth. It began, "My dearest Ruth, I know what you did." Mercer asked Reid, "Who else has been in this room?" Reid stared at the carpet and did not answer her. Beyond the door, a floorboard creaked and a shadow shifted. The mantel clock had halted at a quarter past eleven. Someone had stopped its pendulum by hand, Mercer realised quietly. That missing cup, she suspected, had been washed and hidden. Whoever killed Edmund Vane had wanted the hour to lie.
created_at"2026-10-08T14:27:45.136Z" 10/8/2026, 2:27:45 PM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3227
moderation_latency(null)
generation_time186562
tokens_prompt46
tokens_completion6900
native_tokens_prompt62
native_tokens_completion49665
native_tokens_completion_images(null)
native_tokens_reasoning49151
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"
usage0.0248387
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791469665-QwCLVpHFwnFtE9xxM1qf"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791469665-zrDLp8uVRGIfsYgMuyKd"
upstream_id"msg_011CfpviWWdonaiQmH4xwr7o"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpviWWdonaiQmH4xwr7o"
is_byokfalse
latency997
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0248387
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
95.45% Matches word count n/a
neededCleanfalse
sentences22
wordCounts
010
110
210
310
410
510
610
710
810
910
1010
1110
1210
1310
1410
1510
1630
1710
1810
1910
2010
2110