Run: 2026-10-09-01M4FZW4GJBPW3DT12EM5N6GQT

Run Details

Duration:
2.7s
Cost:
$0.000131
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
81.22% 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 had not stopped for three days straight now. Detective Mara Voss stood beneath the flickering streetlamp outside. Yellow tape fluttered across the mansion gate like nervous ribbons. Inside, someone had died in the library, quietly and alone. Her partner, Tomas Reyes, lit a cigarette with trembling fingers. "The housekeeper found him just after dawn," he said. Mara pulled on gloves and stepped carefully across the wet gravel. Every window of the house glowed except one upstairs. That dark window, she suspected, held the answer. She climbed the marble steps without waiting for the uniformed officers. The front door stood slightly open, as if inviting her in. Somewhere deep in the house, a clock began to chime.
created_at"2026-10-09T09:28:26.904Z" 10/9/2026, 9:28:26 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency782
moderation_latency(null)
generation_time2632
tokens_prompt46
tokens_completion182
native_tokens_prompt62
native_tokens_completion250
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"
usage0.0001312
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791538106-p56xqBEOmLhIUaEjOlQ1"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791538106-HgOEDCy4HmGho83GrPnR"
upstream_id"msg_011CfrRhdm3y3cvdrngnnxQW"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfrRhdm3y3cvdrngnnxQW"
is_byokfalse
latency782
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0001312
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
81.22% Matches word count n/a
neededCleanfalse
sentences12
wordCounts
010
19
210
310
410
59
611
79
88
911
1011
1110