Run: 2026-03-18-01KM0AMBGTFSANAYXBXW16XT1V

Run Details

Duration:
10.7s
Cost:
$0.003689
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 stitched the harbor black, and Detective Mara Vale found the body beneath the pier, waiting like a terrible answer. A single lantern swung overhead, turning the victim's silver cufflinks into accusing eyes that flashed whenever the water shifted below. Mara knelt, smelled salt and copper, then noticed three footprints in the mud, each made by a different shoe size. Behind her, the ferry horn moaned, and every dockworker suddenly found urgent reasons to stare anywhere except the corpse below. Mara rose, meeting the crew's silence with a smile that promised trouble, because the killer had already slipped inside somewhere.
created_at"2026-03-18T11:17:26.186Z" 3/18/2026, 11:17:26 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency10447
moderation_latency(null)
generation_time10577
tokens_prompt46
tokens_completion609
native_tokens_prompt41
native_tokens_completion813
native_tokens_completion_images0
native_tokens_reasoning684
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"
usage0.00368925
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_0c78f5b000d9ac6c0169ba89c645488194b46cdfdb063a3737"
is_byokfalse
latency241
model_permaslug"openai/gpt-5.4-mini-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-1773832646-s5vP5rpFoYaI6h5aqow9"
upstream_id"resp_0c78f5b000d9ac6c0169ba89c645488194b46cdfdb063a3737"
total_cost0.00368925
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
020
120
220
320
420