A chord keyboard uses combinations of keys, like chords on a piano. You have fewer keys so you can type with one hand. I'm not 100% serious about it, learning curve would be horrendous. But it would be interesting to try. I used blackberry for a long time and I hate screen keyboards.
And yes, looks like I found one while looking for examples :) It's $175 on ebay, bit expensive.
It's not: https://llm-stats.com/models/compare/claude-3-7-sonnet-20250219-vs-claude-3-5-sonnet-20241022