Run: 2026-07-09-01KX402QSP9SWP0WG44QKW94QB

Run Details

Duration:
2.1s
Cost:
$0.000911
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
94.82% 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 tapped softly against windows overlooking the sleeping coastal town. Detective Mara Venn arrived before dawn, carrying yesterday's unanswered questions. Inside, the mayor lay beneath portraits, still clutching crimson roses. No doors stood broken, yet muddy footprints crossed the marble floor. A grandfather clock chimed six, then abruptly stopped between heartbeats. Mara noticed seawater pooled beneath the mayor's polished writing desk. Beside it, someone had carved three letters into floorboards. Those letters matched names missing from the town's oldest ledger. Outside, gulls screamed while distant bells announced another approaching tide. Mara opened the ledger, discovering her own name listed there.
created_at"2026-07-09T17:51:17.312Z" 7/9/2026, 5:51:17 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency387
moderation_latency(null)
generation_time1450
tokens_prompt46
tokens_completion191
native_tokens_prompt41
native_tokens_completion145
native_tokens_completion_images0
native_tokens_reasoning0
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"
usage0.000911
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_057cd0a783eb6d11016a4fdf95647c8195ae951abe82f8237f"
is_byokfalse
latency241
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-1783619477-N5ALzSphqKGvn7d6YU5s"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783619477-6IFmGCWTFaip7RwJYK5K"
upstream_id"resp_057cd0a783eb6d11016a4fdf95647c8195ae951abe82f8237f"
total_cost0.000911
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
94.82% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
010
110
210
311
410
510
69
710
810
910