Run: 2026-03-18-01KM08XZ9VC23VKQ2W6NAPGV6Q

Run Details

Duration:
9.0s
Cost:
$0.001162
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 sheeted the manor windows as Inspector Hale arrived, noting the clock stopped exactly three minutes past midnight for him. In the foyer, Lady Marrow stood pale, while servants whispered about a scream from the east library before the storm. Carpet tracks led to a shattered portrait, and beneath it lay Anton Quill, still warm, strangely smiling with clasped hands. Hale knelt beside the body, smelling gunpowder on a fallen key, engraved with a stag crest from the study door. Across the hall, a music box clicked once, then fell silent, as if someone wanted witnesses gone without making noise. Lady Marrow insisted she heard nothing, yet her gloves bore fresh mud from the garden path where only servants walked.
created_at"2026-03-18T10:47:44.202Z" 3/18/2026, 10:47:44 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency8655
moderation_latency(null)
generation_time8874
tokens_prompt46
tokens_completion287
native_tokens_prompt41
native_tokens_completion923
native_tokens_completion_images0
native_tokens_reasoning764
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"
usage0.00116195
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_0bb0ae956aefae330169ba82d043448195a767e9206790894f"
is_byokfalse
latency191
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-1773830864-SOvTdC48x3pzjS7blnCV"
upstream_id"resp_0bb0ae956aefae330169ba82d043448195a767e9206790894f"
total_cost0.00116195
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
120
220
320
420
520