Quoting Quiet_Man, reply 1103it will also build capitals as much as it has capital crew or resources.
... but does the AI research increases in capital crew (to make it interesting), how many AI caps have you seen in play? How have you found the game dynamics with more capitals in play?
yes, you can see it on the summary stats at game ending. The AI researches Capital ship crew just as fleet support or any other tech. But if you compare "Used fleet support" with "Number of capital ships" (both are in the stats) you will see that the AI, with sufficient resource, will always max out fleet support (indeed it seldom ever drops as the AI puts a new ship into the queue immediately one is destroyed) but Capital ships will even drop when is has reached max fleet support research, often not more than 2 or 3. While it researched fleet support, it gains from time to time enough free points to add a capital, but after this it will practical build only smaller ships.
By giving it capital ships independent of fleet support, the AI will max out Capital ship production the same, putting capital ships into the build queue as support points and resources are avalaible. I'm even giving it additional capital ship crew, an ship build-speed and experience-gain bonus of 100% and have now battles with fleets much more equal to my own. No more hundreds of frigates as cannon fodder.