Run: 2026-03-18-01KM09AM4ZXPQ7T9CQ2HNHTQKN

Run Details

Model:
GPT-5.4 Nano (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
8.3s
Cost:
$0.000757
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain tapped windows as Detective Maren entered the silent conservatory. A guest lay still beside marble fountains, unmoving and pale. Her pearls rested near a shattered pocketwatch on velvet nearby. Inspector Rowe whispered that the house smelled faintly of almonds. Maren noticed no footprints, yet fresh lilies leaned inward tonight. Someone had locked the doors, but the key vanished entirely.
created_at"2026-03-18T10:54:38.763Z" 3/18/2026, 10:54:38 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency8086
moderation_latency(null)
generation_time8228
tokens_prompt46
tokens_completion456
native_tokens_prompt41
native_tokens_completion599
native_tokens_completion_images0
native_tokens_reasoning512
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"
usage0.00075695
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_045466ccf58be7560169ba846ed2f88197823955d6a3cd3540"
is_byokfalse
latency198
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-1773831278-Nb9Rjr2DndDT0WNai1Hp"
upstream_id"resp_045466ccf58be7560169ba846ed2f88197823955d6a3cd3540"
total_cost0.00075695
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
010
110
210
310
410
510