Run: 2026-09-23-01M36RDWSFXW7QH6R4RW8W411Y

Run Details

Duration:
16.6s
Cost:
$0.000885
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 old observatory’s brass clock stopped, though every witness swore its hands had been moving just moments earlier. Dr. Vale lay beneath the telescope, one gloved hand curled around a silver key no door in the building fit. Rain tapped the domed windows while Inspector Mara Venn studied the room’s silence and smelled fresh roses beneath the smoke. Behind her, the observatory’s seven guests stood shoulder to shoulder, each insisting they had never left the building since dinner. Mara noticed one guest’s cuffs were dry, despite the storm, and another’s shoes carried dust from the sealed east stair. The clock struck twelve, although its hands remained fixed at eleven seventeen, and every guest turned toward an unlocked door. Mara did not follow their gaze; she watched the dead man’s reflection in the telescope lens, where someone stood smiling. When she looked behind her, the doorway was empty, but wet footprints crossed the floor toward the chair behind her.
created_at"2026-09-23T09:09:28.505Z" 9/23/2026, 9:09:28 AM
model"openai/gpt-6-luna-20260922"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency14640
moderation_latency(null)
generation_time16536
tokens_prompt46
tokens_completion341
native_tokens_prompt41
native_tokens_completion1761
native_tokens_completion_images0
native_tokens_reasoning1552
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"
usage0.0008846
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790154568-qMi7wQHPXsSHZ7NZnP2W"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790154568-mOGez6bAvvkVC6luWgVY"
upstream_id"resp_0a14987ce0ecc0ce016ab3974899ec87d199fecd01735a4bcf"
provider_responses
0
endpoint_id"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id"resp_0a14987ce0ecc0ce016ab3974899ec87d199fecd01735a4bcf"
is_byokfalse
latency713
model_permaslug"openai/gpt-6-luna-20260922"
provider_name"OpenAI"
status200
total_cost0.0008846
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