Run: 2026-09-23-01M36P1HFES7WXDBBDCQZ3VZ4H

Run Details

Duration:
15.7s
Cost:
$0.000938
Provider:
OpenAI

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 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
At midnight, the bells of Blackthorn Hall rang thirteen times, though everyone inside swore the clock had stopped years ago. Mara Venn found the body beneath the grandfather clock, one gloved hand curled around a silver key bearing strange initials. She knew the dead man; everyone in the village knew Lord Vale, though each feared him for a different reason. Rain tapped against the tall windows while Mara knelt, careful not to disturb the dark pool spreading beneath his waistcoat. Behind her, the guests gathered in the doorway, whispering accusations before anyone thought to summon the nearest available police officers. Mara lifted the key, and Lord Vale’s blood gleamed on its teeth like fresh paint beneath the chandelier, unnaturally bright. Then the clock began ticking again, and every guest turned toward the locked study at the end of the hall. Mara noticed the key in her palm had vanished, leaving a tiny crown-shaped red mark burning against her skin still.
created_at"2026-09-23T08:27:46.551Z" 9/23/2026, 8:27:46 AM
model"openai/gpt-6-luna-20260922"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4123
moderation_latency(null)
generation_time15557
tokens_prompt46
tokens_completion531
native_tokens_prompt41
native_tokens_completion1868
native_tokens_completion_images0
native_tokens_reasoning1667
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"completed"
service_tier"default"
usage0.0009381
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790152066-EkZQECjYNppLuJQAfuQ4"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790152066-bSc4i7XBxKrZxR2hAsI4"
upstream_id"resp_013db1b50bfadfb2016ab38d82b5fc87d187c2b90c4096a263"
provider_responses
0
endpoint_id"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id"resp_013db1b50bfadfb2016ab38d82b5fc87d187c2b90c4096a263"
is_byokfalse
latency896
model_permaslug"openai/gpt-6-luna-20260922"
provider_name"OpenAI"
status200
total_cost0.0009381
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
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
sentences8
wordCounts
020
120
220
320
420
520
620
720