The Banana Pi BPI-EAI80 is an affordable single-board computer that packs a dual-core AI accelerator. The board could also be used as an alternative to a Raspberry Pi thanks to its 40-pin GPIO header, albeit with some limitations.
https://www.notebookcheck.net/Banana-Pi-A-Raspberry-Pi-alternative-with-an-AI-accelerator-that-costs-just-US-16.497765.0.html