Run: 2026-09-23-01M36R604ZSCSAC1J48XSM4STY

Run Details

Duration:
10.8s
Cost:
$0.000588
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 lighthouse keeper found the mayor’s coat floating in the harbor, its pockets weighted with smooth, unfamiliar stones. No body surfaced, but a crimson thread clung to the iron ladder, trembling whenever the tide dragged against the pilings. Inspector Vale arrived before dawn, carrying a suitcase, a revolver, and the private conviction that someone had already begun lying. The keeper watched her examine the coat, then whispered, “He was wearing it when he came back from the dead.” Vale looked up sharply; outside, the lighthouse beam crossed the water and illuminated a second figure standing on the breakwater. It raised one gloved hand, then vanished as the beam turned, leaving only a wet footprint on the stone steps. The mayor’s name was carved into its heel, though he had been buried beneath the yew tree three years earlier. From somewhere below the rocks came three slow knocks, and the keeper began counting them with the terror of recognition.
created_at"2026-09-23T09:05:09.802Z" 9/23/2026, 9:05:09 AM
model"openai/gpt-6-luna-20260922"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency9782
moderation_latency(null)
generation_time10789
tokens_prompt46
tokens_completion253
native_tokens_prompt41
native_tokens_completion1168
native_tokens_completion_images0
native_tokens_reasoning962
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"
usage0.0005881
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790154309-z6zx0Tb8uSbCEbUiktqC"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790154309-VcYWfcVkbNvoUAKx5vBD"
upstream_id"resp_03836dcd510fb01d016ab39645e5c087d19e6c5b1de2e32ed3"
provider_responses
0
endpoint_id"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id"resp_03836dcd510fb01d016ab39645e5c087d19e6c5b1de2e32ed3"
is_byokfalse
latency398
model_permaslug"openai/gpt-6-luna-20260922"
provider_name"OpenAI"
status200
total_cost0.0005881
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