What was the first starship to achieve warp 5?

What was the first starship to achieve warp 5? The NX-01 Enterprise was humanity’s first starship capable of reaching warp 5.

The ship was built by the United Earth government and Starfleet as the culmination of decades of warp-drive development. Launched in 2151 under Captain Jonathan Archer, it gave humans a range far beyond the older warp-3 and warp-4 vessels used by earlier explorers.

Enterprise initially had a maximum speed of about warp 5. Later upgrades improved its performance, allowing a cruising speed above warp 5 and an emergency speed of warp 5.2. The ship’s early voyages form the setting of Star Trek: Enterprise and take place before the United Federation of Planets existed.

The wording can cause confusion because the Phoenix was humanity’s first warp-capable spacecraft, achieving warp 1 in 2063. It was not a warp-5 vessel. The USS Enterprise from The Original Series was a later Constitution-class ship, while USS Discovery belongs to a much later era. Thus, NX-01 Enterprise is the intended canonical answer for the first human warp-5 starship.