Run: 2026-09-23-01M36NYJ0NFBM3KATJPA4WSBC3

Run Details

Duration:
3.9s
Cost:
$0.000064
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
49.67% 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 bell rang twice, though its keeper had been dead for seven hours and remained locked inside. Mara Venn arrived carrying a bloodstained umbrella, despite the cloudless sky and the dry gravel path beneath her boots. On the threshold, Inspector Vale noticed wet footprints leading inward, but none returning through the dust toward the harbor. The victim’s watch had stopped at twelve, while every clock in town insisted it was eleven seventeen exactly. Then the telephone rang upstairs, and Mara whispered, “Don’t answer; he always calls before someone disappears from here.”
created_at"2026-09-23T08:26:08.795Z" 9/23/2026, 8:26:08 AM
model"openai/gpt-6-luna-20260922"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2756
moderation_latency(null)
generation_time3846
tokens_prompt46
tokens_completion157
native_tokens_prompt41
native_tokens_completion120
native_tokens_completion_images0
native_tokens_reasoning0
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"
usage0.0000641
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790151968-iwCORNbONxLHSefJuGiF"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790151968-ST2myHWjTwvcZU4J8vOk"
upstream_id"resp_0068f83c183d2af8016ab38d20e4b887d195befcadb247612d"
provider_responses
0
endpoint_id"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id"resp_0068f83c183d2af8016ab38d20e4b887d195befcadb247612d"
is_byokfalse
latency1469
model_permaslug"openai/gpt-6-luna-20260922"
provider_name"OpenAI"
status200
total_cost0.0000641
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
49.67% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
020
119
219
318
418