Claude and Gemini are decent at it as well. I was surprised when I asked claude (and this was several months back) to come up with a testbench for some very old

Claude and Gemini are decent at it as well. I was surprised when I asked claude (and this was several months back) to come up with a testbench for some very old, poorly documented verilog. It did a very decent job for a first-cut testbench. It even collected common, recurring code into verilog tasks (functions) which really surprised me at the time.