Run: 2026-03-18-01KM09MGJZV9H25D9BE2PGBTV2

Run Details

Duration:
1.3s
Cost:
$0.000202
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
70.72% 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
Detective Mara Venn arrived at Harborlight after midnight, breathless and cautious. The pier lights flickered, casting shadows across the silent warehouse entrance. Inside, a body lay sprawled beside stacked crates, oddly uncovered. Detective Venn studied the wound, noting bruises shaped like rings. A stern inspector whispered that the victim wore gloves. Nearby, a spilled lantern oil glimmered, smelling sharply metallic. Captain Rourke insisted no one left, checking radios. Witnesses huddled outside, repeating names, times, and conflicting alibis. Mara requested the lockbox key, then examined the victim's watch. At last, it stopped at 12:07, precisely.
created_at"2026-03-18T11:00:02.798Z" 3/18/2026, 11:00:02 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency505
moderation_latency(null)
generation_time861
tokens_prompt46
tokens_completion177
native_tokens_prompt41
native_tokens_completion155
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)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.00020195
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_0c6c0820e32dd0280169ba85b2dfd48196a16e03d1d5c6cd81"
is_byokfalse
latency232
model_permaslug"openai/gpt-5.4-nano-20260317"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer(null)
api_type"completions"
id"gen-1773831602-Vxwj4LxppebUyInSmyAT"
upstream_id"resp_0c6c0820e32dd0280169ba85b2dfd48196a16e03d1d5c6cd81"
total_cost0.00020195
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
70.72% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
011
111
210
310
49
59
68
79
810
97