openTPU
An open-source AI accelerator, developed by AI
...Both int8 and compact 4-bit weight formats are supported to trade memory use, accuracy, and throughput. Validation tools compare simulator, RTL, FPGA, and Hugging Face reference outputs to detect implementation differences. The included Lens profiler exposes timelines, roofline information, and per-instruction behavior. Command-line chat, monitoring tools, diagnostics, and an OpenAI-compatible inference server make the accelerator usable beyond low-level hardware experiments.