B.G 15.15
sarvasya cāhaṃ hṛdi saṃniviṣṭo mattaḥ smṛtirjñānamapohanaṃ ca। vedaiśca sarvairahameva vedyo vedāntakṛdvedavideva cāham ॥15॥
I reside in the heart of every being, and from me arise memory, knowledge, and removal of misconceptions. Through all the Vedas, I am to be understood; I am the author of Vedānta and the one who truly knows the Vedas.
Gīta Bhāshya 15.15
The correct conclusion of the Vedas based on inquiry is known as Vedānta, i.e. Brahma Sutras, authoured by sage Vyāsa.
vedanirṇayātmikā mīmāṁsā vedāntaḥ। tathāca sāmavede prācīnaśālāśrutiḥ-
The correct conclusion of the Vedas based on mīmāṁsā, i.e. inquiry, is known as Vedānta. It is stated in the Sama Veda, the ancient school tradition:
"sa vedāntakṛt sa kālaka iti। sa hyeva yuktisūtrakṛt kālakaḥ।"
"He is known as the author of Vedanta, and thus referred to as Kālaka. Indeed, he is the same Kālaka who authored the Yuktisutra."
iti ॥15॥
- stated thus.
Note: From the Madhva disciple tradition, the "Yukti-sutras" here are interpreted as "Brahma sutras" of Badarayana Vyāsa, and Vyāsa is considered as the incarnation of Lord Vishnu.
Gīta Tātparya 15.15
Lord Vyāsa is the author of Vedānta sutras, i.e. Brahma sutras.
"sa eva vyāsarūpeṇa vedāntakṛdudāhṛtaḥ।"
He is indeed mentioned as the author of the Vedānta in the form of Vyāsa.