Ec2 Pricing Hindi-On-Demand |Savings Plans|EC2 Spot Instances |Dedicated Hosts|Capacity Reservations

On-Demand:-
On-Demand Instances let you pay for compute capacity by the hour or second with no long-term commitments. This frees you from the costs and complexities of planning, purchasing, and maintaining hardware and transforms what are commonly large fixed costs into much smaller variable costs.
Savings Plans:-
Savings Plans is a flexible pricing model that can help you reduce your bill by up to 72% compared to On-Demand prices, in exchange for a commitment to a consistent amount of usage (measured in $/hour) for a 1- or 3-year term.
Amazon EC2 Spot Instances:-
Amazon EC2 Spot Instances let you take advantage of unused EC2 capacity in the AWS cloud and are available at a discount of up to 90% compared to On-Demand prices.
Dedicated Hosts:-
A Dedicated Host is a physical EC2 server fully dedicated for your use. Dedicated Hosts can help you reduce costs by allowing you to use your existing server-bound software licenses, including Windows Server, SQL Server, and SUSE Linux Enterprise Server (subject to your license terms). Dedicated Hosts can be purchased On-Demand (hourly) or can be purchased as part of Savings Plans.
On-Demand Capacity Reservations:-
On-Demand Capacity Reservations enable you to reserve compute capacity for your EC2 instances in a specific Availability Zone for any duration. Capacity reservations mitigate against the risk of being unable to get On-Demand capacity in case of capacity constraints and ensure that you always have access to EC2 capacity when you need it, for as long as you need it.