[breser]

Yubikey 4 and newer supports 4096 bit keys with PGP: https://www.yubico.com/products/compare-yubikey-4-neo/ https://www.yubico.com/products/compare-yubikey-5-series/

[laksdjfkasljdf]

where do you see that information on that page?

[crote]

All the way at the bottom of the table, under "Cryptographic Specifications".

Recent versions also have support for plenty of ECC algorithms, see https://www.yubico.com/blog/whats-new-in-yubikey-firmware-5-...