Run: 2026-10-08-01M4DAMT4A46YDM1XR7T7B052D

Run Details

Duration:
3.5s
Cost:
$0.000187
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
84.45% 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 fell hard against the windows of Blackmoor Manor. Inspector Halloway arrived just after midnight with his weary assistant. Lord Ashcombe had been found dead in the library that evening. Nobody in the household had heard a single scream or cry. The fireplace still glowed faintly with embers from the previous night. Every door in the mansion had been locked from the inside. Mrs. Whitlow, the housekeeper, wrung her trembling hands repeatedly. Her nephew Edmund stood quietly near the staircase, saying nothing. Lady Ashcombe sat rigidly upon the velvet settee, staring ahead. Halloway knelt beside the body and studied the pale, twisted fingers. A crystal decanter lay shattered upon the Persian rug nearby. Something glinted beneath the leather armchair, catching the lamplight. He reached for it carefully, aware that everyone was watching him. It was a silver cufflink, engraved with a single initial: M. Across the room, Edmund's face drained of all remaining color.
created_at"2026-10-08T08:38:57.939Z" 10/8/2026, 8:38:57 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3416
moderation_latency(null)
generation_time3416
tokens_prompt46
tokens_completion249
native_tokens_prompt62
native_tokens_completion361
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"
usage0.0001867
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448737-SjN0lYgBHI1bYJHULAXl"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448737-uhgO76r3FONP88IKZBap"
upstream_id"msg_011CfpU7sukBD8V4QHn9b2aG"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpU7sukBD8V4QHn9b2aG"
is_byokfalse
latency976
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0001867
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
84.45% Matches word count n/a
neededCleanfalse
sentences15
wordCounts
010
110
211
311
411
511
69
710
810
911
1010
119
1211
1311
1410