Run: 2026-03-18-01KM07XGT1K20401QSDSRGAJQB

Run Details

Duration:
10.1s
Cost:
$0.006106
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 polished the manor windows as Inspector Vale stepped inside, where candlelight trembled over portraits and a spilled glass below. Mrs. Ashdown waited by the staircase, her pearl necklace broken, her voice too calm, and her hands stained with ash. No one mentioned the scream, though everyone had heard it, because the body in the library made silence necessary tonight. Vale knelt beside the desk, where a pocket watch ticked impossibly, and noticed muddy footprints leading toward the conservatory doors. Somewhere beyond the walls, thunder answered, and Inspector Vale realized the murderer was still in the house watching him now.
created_at"2026-03-18T10:30:00.781Z" 3/18/2026, 10:30:00 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency9965
moderation_latency(null)
generation_time10025
tokens_prompt46
tokens_completion552
native_tokens_prompt41
native_tokens_completion1350
native_tokens_completion_images0
native_tokens_reasoning1220
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"
usage0.00610575
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_0f36502d45b29e810169ba7ea8d4f4819582a7adfb87181398"
is_byokfalse
latency159
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-1773829800-0sWRWIZzgy6AcTSDvHP0"
upstream_id"resp_0f36502d45b29e810169ba7ea8d4f4819582a7adfb87181398"
total_cost0.00610575
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