Run: 2026-09-23-01M37PJEQQED2T3V80NXW1NVMS

Run Details

Duration:
11.0s
Cost:
$0.015808
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 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The storm arrived at midnight. Rain hammered the manor windows. Lady Ashworth descended the stairs. Her candle flickered and hissed. The house seemed too quiet. She reached the library door. It stood open, unusually so. Cold air drifted from inside. She stepped across the threshold. Her husband sat by firelight. His head hung strangely low. She whispered his name softly. He did not answer her. Then she saw the blood. It pooled beneath his chair. A silver letter opener gleamed. It jutted from his chest. Lady Ashworth dropped her candle. Darkness swallowed the entire room. Somewhere, a floorboard creaked slowly. She was not alone here.
created_at"2026-09-23T17:56:15.243Z" 9/23/2026, 5:56:15 PM
model"anthropic/claude-opus-5.5-20260921"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4784
moderation_latency(null)
generation_time10937
tokens_prompt46
tokens_completion280
native_tokens_prompt62
native_tokens_completion778
native_tokens_completion_images(null)
native_tokens_reasoning548
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"
usage0.015808
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790186175-UQAfUae4gfAcnZBNAIXi"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790186175-nTa6tnLl7cPT7c0E6lE8"
upstream_id"msg_011CfLoUwGr9t6UwK4i7bDJG"
provider_responses
0
endpoint_id"3a2388bc-3740-4e64-a1f5-4e301726b6b9"
id"msg_011CfLoUwGr9t6UwK4i7bDJG"
is_byokfalse
latency1221
model_permaslug"anthropic/claude-opus-5.5-20260921"
provider_name"Claude Platform on AWS"
status200
total_cost0.015808
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
sentences21
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155
165
175
185
195
205