Run: 2026-10-08-01M4DA4D4FDA291EFEMQAF6DYJ

Run Details

Duration:
2.7s
Cost:
$0.000125
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
28.04% 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. Detective Harold Crane stepped out of his car. Yellow tape fluttered across the iron gates ahead. Somewhere inside, a door creaked slowly open. He pulled his collar tight against the cold. Officer Mary Lewis met him on the wet steps. Her face looked pale beneath the flickering porch light. "Body's upstairs, in the east study," she whispered. Crane nodded and climbed the marble stairs. Every step echoed through the empty, sleeping house. The study door hung slightly ajar tonight. Inside, a single candle still burned low. Crane's eyes swept across the overturned chair. Then they landed on the victim's outstretched hand.
created_at"2026-10-08T08:30:00.344Z" 10/8/2026, 8:30:00 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency784
moderation_latency(null)
generation_time2612
tokens_prompt46
tokens_completion167
native_tokens_prompt62
native_tokens_completion237
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"
usage0.0001247
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448200-PbzpxBysg5UtTh7TPskb"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448200-IB9SyIyQQjtP4T4g7Dd3"
upstream_id"msg_011CfpTSEoUwWK3VmW6CpMww"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpTSEoUwWK3VmW6CpMww"
is_byokfalse
latency784
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0001247
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
28.04% Matches word count n/a
neededCleanfalse
sentences14
wordCounts
08
18
28
37
48
59
69
78
87
98
107
117
127
138