Run: 2026-07-09-01KX417NSTFFM865CNZPGM7KPD

Run Details

Duration:
5.3s
Cost:
$0.004871
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 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain battered Blackthorn Manor’s windows. Inspector Vale arrived before dawn. The front door stood open. Inside, silence smelled faintly metallic. Lady Mercer lay beneath chandeliers. Her throat bore crimson markings. Nobody had touched the body. Muddy footprints crossed the carpet. Vale crouched beside the corpse. Warm blood stained his glove. Then someone laughed softly upstairs. Every guest gathered in silence. Six faces watched Inspector Vale. One familiar face was missing. Vale remembered the locked conservatory. Someone whispered, “She deserved death.” Vale studied every frightened expression. Then the clock struck thirteen. All candles went out simultaneously. Behind Vale, the door slammed. The murderer had never left.
created_at"2026-07-09T18:11:27.681Z" 7/9/2026, 6:11:27 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1973
moderation_latency(null)
generation_time5047
tokens_prompt46
tokens_completion504
native_tokens_prompt41
native_tokens_completion805
native_tokens_completion_images0
native_tokens_reasoning642
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"
usage0.004871
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_0090bdaba379aadf016a4fe44fc1a481968e97f21830d0cb5a"
is_byokfalse
latency209
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-1783620687-XAJOM0SoOqy1L29S2NV2"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620687-FyXdG50R2AIGLWoDY57y"
upstream_id"resp_0090bdaba379aadf016a4fe44fc1a481968e97f21830d0cb5a"
total_cost0.004871
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
sentences21
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155
165
175
185
195
205