Run: 2026-09-23-01M36P2J7BEBF9CQ2P23R7C9XN

Run Details

Duration:
26.8s
Cost:
$0.001006
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 clock stopped, though witnesses swore its hands moved when Captain Vale entered the locked room alone. By dawn, the door remained bolted from within, and Vale lay beside a teacup that smelled faintly of seawater still. Inspector Mara Venn disliked impossible crimes, especially those staged beneath portraits whose eyes seemed to follow her across the room. She found guests waiting in the ballroom, each insisting they had heard the clock strike thirteen before lights went out. Only the housekeeper kept silent, clutching a wet matchbox and watching carefully the inspector's reflection instead of the inspector herself. On the mantel, beside the stopped clock, Mara noticed a fresh fingerprint pressed into the dust, pointing toward the window. Outside, waves battered the cliffs, while inside, someone whispered her name through the locked door in a familiar voice again.
created_at"2026-09-23T08:28:20.081Z" 9/23/2026, 8:28:20 AM
model"openai/gpt-6-luna-20260922"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency20868
moderation_latency(null)
generation_time26752
tokens_prompt46
tokens_completion345
native_tokens_prompt41
native_tokens_completion2003
native_tokens_completion_images0
native_tokens_reasoning1820
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"
usage0.0010056
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790152100-OjVtL9VyUHSNAYtkOgJW"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790152100-qwKw3WORK3RfA1pddA1V"
upstream_id"resp_074fd8ce64b5ad84016ab38da431a887d188e289f7a0f1cb55"
provider_responses
0
endpoint_id"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id"resp_074fd8ce64b5ad84016ab38da431a887d188e289f7a0f1cb55"
is_byokfalse
latency788
model_permaslug"openai/gpt-6-luna-20260922"
provider_name"OpenAI"
status200
total_cost0.0010056
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
sentences7
wordCounts
020
120
220
320
420
520
620