Run: 2026-09-23-01M36RFJ2G0GVGAVM8A0QE0MKQ

Run Details

Duration:
14.6s
Cost:
$0.000694
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 doors stood ajar, spilling lamplight across the snow and illuminating a single crimson footprint. Detective Mara Venn arrived alone, her coat unbuttoned, while the entrance clock struck thirteen with a shudder, then stopped dead. Inside, Professor Hale lay faceup beneath the star chart, his silver spectacles folded neatly beside an untouched cup of tea. Nothing appeared disturbed except the window latch, gleaming wetly against the room’s bitter, perfectly dry air, and the overturned chair. Venn knelt beside him, noticing a tiny paper boat tucked beneath Hale’s palm, its folded sail marked with fresh blood. Then the dead professor’s watch chimed once, though its hands had been removed, and someone whispered her name from upstairs.
created_at"2026-09-23T09:10:23.071Z" 9/23/2026, 9:10:23 AM
model"openai/gpt-6-luna-20260922"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3974
moderation_latency(null)
generation_time14549
tokens_prompt46
tokens_completion475
native_tokens_prompt41
native_tokens_completion1380
native_tokens_completion_images0
native_tokens_reasoning1215
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"
usage0.0006941
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790154623-32F1LIAmBXP2GFBD6wfN"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790154623-l2Mos7fI7yyEo3xYjxuF"
upstream_id"resp_0c9a5ee813b20fcd016ab3977f37e887d18c444d320cb8aeea"
provider_responses
0
endpoint_id"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id"resp_0c9a5ee813b20fcd016ab3977f37e887d18c444d320cb8aeea"
is_byokfalse
latency575
model_permaslug"openai/gpt-6-luna-20260922"
provider_name"OpenAI"
status200
total_cost0.0006941
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
sentences6
wordCounts
020
120
220
320
420
520