Run: 2026-09-23-01M36R9VBD7KNF02F855G3JG23

Run Details

Duration:
18.4s
Cost:
$0.000975
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 bell rang once, though its keeper had been dead for three days and buried far inland. Mara Vale heard it from the manor library, where rain tapped the windows like impatient fingers seeking entry after midnight. She looked up from the unsigned will and found the grandfather clock stopped at precisely eleven seventeen that wet evening. Across the room, Inspector Shaw stood beside a corpse none remembered inviting, with white gloves folded neatly across its chest. The dead man wore Mara's father's signet ring, missing since the night her mother vanished without explanation from the house. Shaw noticed her staring, then asked whether she recognized the victim, while thunder swallowed the answer she nearly gave aloud. Before Mara could speak, someone upstairs began playing the dead keeper's hymn on a piano, though every room stood empty. Inspector Shaw reached for his notebook, but Mara recognized the melody and whispered, “That song was played at Father's funeral.”
created_at"2026-09-23T09:07:15.965Z" 9/23/2026, 9:07:15 AM
model"openai/gpt-6-luna-20260922"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency17715
moderation_latency(null)
generation_time18218
tokens_prompt46
tokens_completion258
native_tokens_prompt41
native_tokens_completion1942
native_tokens_completion_images0
native_tokens_reasoning1750
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"
usage0.0009751
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790154436-9KBCTOP1XHHi9I5Wl1cO"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790154436-fmAYUh9IamAwGb78084A"
upstream_id"resp_0dae932a3a2e8644016ab396c483dc87d1ba70dfb96c53bb2d"
provider_responses
0
endpoint_id"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id"resp_0dae932a3a2e8644016ab396c483dc87d1ba70dfb96c53bb2d"
is_byokfalse
latency1341
model_permaslug"openai/gpt-6-luna-20260922"
provider_name"OpenAI"
status200
total_cost0.0009751
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