Run: 2026-07-09-01KX416G9A225VPSQHFQ7HYCRW

Run Details

Duration:
10.2s
Cost:
$0.010715
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, Inspector Vale found the mayor's body beneath the ballroom chandelier, surrounded by roses and an unnaturally deep silence. Rain clawed the windows while twelve guests watched Vale kneel, each wearing an expression carefully practiced for innocence and fear. The victim's silver watch had stopped at eleven seventeen, precisely when the orchestra abruptly lost its final, discordant note forever. Vale noticed mud beneath the rug, though every guest insisted nobody had entered through the garden after sunset that evening. Then the lights flickered, revealing a lipstick mark on the dead man's collar, bright as a warning against white linen. A violin string snapped upstairs, and every face turned toward the locked gallery door except one, which remained perfectly still. Vale studied the silent guest, a woman whose gloved hands concealed something small, sharp, and unmistakably wet beneath her sleeve. Before he could speak, she smiled and whispered, “Ask who invited the storm, Inspector, and why it answered so loudly.” Outside, thunder rolled across the rooftops, and somewhere inside the mansion, a second body struck the floor with another thud.
created_at"2026-07-09T18:10:49.266Z" 7/9/2026, 6:10:49 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2214
moderation_latency(null)
generation_time9934
tokens_prompt46
tokens_completion869
native_tokens_prompt41
native_tokens_completion1779
native_tokens_completion_images0
native_tokens_reasoning1551
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"
usage0.010715
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_0bb7a909fd939954016a4fe429551c8196b75fab2f52b879d0"
is_byokfalse
latency235
model_permaslug"openai/gpt-5.6-luna-20260709"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1783620649-MO6dEp02NqugdSsusrri"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620649-IU1XGZ3d8mUQUQYPxfKb"
upstream_id"resp_0bb7a909fd939954016a4fe429551c8196b75fab2f52b879d0"
total_cost0.010715
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
020
120
220
320
420
520
620
720
820