Run: 2026-10-09-01M4FYN627NCGR0SYF58N14T35

Run Details

Duration:
3.6s
Cost:
$0.000190
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
74.96% 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 fell hard on the silent manor tonight. Detective Marcus Hale stepped carefully across the wet gravel. Behind him, the flashing police lights painted the hedges red. Nobody had expected the body in the library today. Lady Evelyn Ashworth lay motionless beside her overturned chair. A single crystal glass rested near her outstretched hand. Marcus knelt slowly and studied the faint smell of almonds. Someone had poisoned her tea before the guests arrived. The butler, Thomas Reed, stood trembling by the doorway. His hands were stained with something dark and sticky. Marcus noticed a muddy bootprint leading toward the garden terrace. Whoever left it had been here very recently indeed. He looked up at the grand staircase above them. Three guests had quarreled bitterly over dinner that very evening. Now every one of them was hiding a secret. Marcus pulled out his notebook and began writing carefully. The first question was simple, yet deeply troubling. Who had wanted Lady Evelyn dead so badly?
created_at"2026-10-09T09:07:10.542Z" 10/9/2026, 9:07:10 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3618
moderation_latency(null)
generation_time3618
tokens_prompt46
tokens_completion257
native_tokens_prompt62
native_tokens_completion367
native_tokens_completion_images(null)
native_tokens_reasoning0
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"
usage0.0001897
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791536830-UBC3VfGBZVLGNkj1BjvP"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791536830-OaGh0MrVekowC9EtIY2h"
upstream_id"msg_011CfrQ5Z2BXojXvsSrD6Zme"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfrQ5Z2BXojXvsSrD6Zme"
is_byokfalse
latency1145
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0001897
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
74.96% Matches word count n/a
neededCleanfalse
sentences18
wordCounts
09
19
210
39
49
59
610
79
89
99
1010
119
129
1310
149
159
168
178