Fiber internet speeds in South Africa can vary depending on the provider and the plan you choose. However, most fiber optic internet plans in South Africa offer speeds of up to 100Mbps, 500Mbps, or even 1Gbps.

Here are some of the fastest fiber internet providers in South Africa:

• Telkom: Telkom offers fiber optic internet plans with speeds up to 1Gbps.
  
• Vodacom: Vodacom offers fiber optic internet plans with speeds up to 500Mbps.
  
• Cool Ideas: Cool Ideas offers fiber optic internet plans with speeds up to 1Gbps.
  
• Mweb: Mweb offers fiber optic internet plans with speeds up to 500Mbps.
  
• Webafrica: Webafrica offers fiber optic internet plans with speeds up to 1Gbps.
  

It is important to note that the actual speed of your fiber optic internet connection will depend on a number of factors, including the distance between your home and the fiber optic network, the number of other users on the network, and the quality of your home’s WiFi network.

If you are looking for the fastest possible fiber internet connection in South Africa, then you should choose a plan with a speed of 1Gbps. However, if you are on a budget or if you do not need the fastest possible connection, then you may be able to save money by choosing a plan with a lower speed.