Run: 2026-07-09-01KX407XB36362JX6909AETNAJ

Run Details

Duration:
10.4s
Cost:
$0.006467
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
Rain needled the courthouse windows while Inspector Vale discovered a dead judge beneath the abandoned witness stand before dawn, alone. A silver key rested between the judge’s fingers, polished clean except for one crimson thread caught beneath its jagged teeth. Vale heard footsteps above him, though the courthouse had stood empty since midnight, locked from every entrance without exception tonight. On the judge’s desk, an unsigned verdict waited beside two teacups, one warm, one dusted with ash, and fresh blood. The clock behind the bench chimed thirteen times, then stopped, leaving Vale alone with the impossible arithmetic of that hour. When Vale turned the key over, a tiny inscription gleamed: “RETURN WHAT YOU STOLE, OR BURY ANOTHER, BEFORE DAYBREAK, INSPECTOR.” From the gallery, someone applauded softly, and every courtroom door swung open at precisely the same moment without any warning.
created_at"2026-07-09T17:54:06.827Z" 7/9/2026, 5:54:06 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2277
moderation_latency(null)
generation_time10118
tokens_prompt46
tokens_completion814
native_tokens_prompt41
native_tokens_completion1071
native_tokens_completion_images0
native_tokens_reasoning884
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"
usage0.006467
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_07a8974ada4d4c74016a4fe03ee2ec81969d3f20b72c6f4f2c"
is_byokfalse
latency233
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-1783619646-MgCh4Pm47VgxJi6M3O5J"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783619646-QGBcVGVndBMLRqB45AgF"
upstream_id"resp_07a8974ada4d4c74016a4fe03ee2ec81969d3f20b72c6f4f2c"
total_cost0.006467
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
sentences7
wordCounts
020
120
220
320
420
520
620