Run: 2026-07-09-01KX4098S8YZ3801SYD8PPJWQ2

Run Details

Duration:
7.4s
Cost:
$0.009923
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain hammered Blackthorn Hall as Detective Mara Vale arrived alone. The butler waited beneath the porch, pale, trembling, and silent. Inside, grandfather clocks had stopped simultaneously at precisely midnight together. A woman lay beside the library fireplace, clutching broken glass. Her blood darkened letters scattered across the expensive Persian carpet. Vale recognized one message: TRUST NOBODY IN THIS HOUSE TONIGHT. Behind her, the front door slammed though nobody entered there. Every guest gathered upstairs claimed hearing footsteps before screaming began. Somewhere nearby, a child laughed once, then suddenly stopped forever. Vale drew her revolver and noticed footprints leading inward upstairs. Each print was wet, although rain had never entered Blackthorn. At the staircase, someone whispered her name from below softly. Vale looked down, discovering herself reflected in a stranger’s eyes.
created_at"2026-07-09T17:54:51.314Z" 7/9/2026, 5:54:51 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2032
moderation_latency(null)
generation_time7200
tokens_prompt46
tokens_completion567
native_tokens_prompt41
native_tokens_completion1647
native_tokens_completion_images0
native_tokens_reasoning1475
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"
usage0.009923
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_0690ddc40dcd3cf5016a4fe06b6544819480d4cf87de8dae80"
is_byokfalse
latency262
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-1783619691-GljyTsdOkukXJnBKVFye"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783619691-IfQjtcHYf93HPeMJWz8l"
upstream_id"resp_0690ddc40dcd3cf5016a4fe06b6544819480d4cf87de8dae80"
total_cost0.009923
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
sentences13
wordCounts
010
110
210
310
410
510
610
710
810
910
1010
1110
1210