Run: 2026-10-08-01M4DA3CKCDGZ43DDKXVYCCVND

Run Details

Duration:
2.9s
Cost:
$0.000169
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
51.66% 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 steadily against the tall windows. Detective Mara Voss stepped carefully across the polished marble floor. Somewhere above, a door slammed shut unexpectedly. She pulled on thin latex gloves and sighed. The mansion smelled of old wood and bitter coffee. Candlelight flickered across the portraits lining the grand staircase. Constable Dennis Hale waited near the library entrance, pale. "He's inside, ma'am, just as we found him." Mara nodded once and pushed the heavy oak door open. Lord Edmund Ashford lay sprawled across the Persian rug. A silver letter opener protruded from his chest. Beside his outstretched hand lay a single red rose. Its petals had not yet begun to wilt. Mara knelt beside the body and studied the scene. Nothing in the room seemed disturbed except one thing. The clock on the mantel had stopped at midnight. Someone in this house was lying, and Mara intended to find out who.
created_at"2026-10-08T08:29:27.028Z" 10/8/2026, 8:29:27 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2884
moderation_latency(null)
generation_time2884
tokens_prompt46
tokens_completion229
native_tokens_prompt62
native_tokens_completion326
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"
usage0.0001692
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448167-6cqxQLGhGGavI3Y4EiNP"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448167-YoJNMQ240xcWSdEiCixg"
upstream_id"msg_011CfpTPnE29RnidH1LkM9gu"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpTPnE29RnidH1LkM9gu"
is_byokfalse
latency722
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0001692
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
51.66% Matches word count n/a
neededCleanfalse
sentences16
wordCounts
08
110
27
38
49
59
69
718
89
98
109
118
129
139
149
1513