According to this NEWS.COM article, Solaris will be free for systems using x86 processors. Security updates will also be provided at no charge, but bug fixes and support will require an annual subscription fee.

The subscription will cost $120 per processor per year for bug fixes, $240 per processor per year for 12-hour support five days a week and $360 per processor per year for 24-hour support seven days a week. With premium support, the new Solaris 10 version will cost $1,440 per year for a server with four Opteron processors from Advanced Micro Devices, for example.