A company plans to build an application using Amazon Bedrock but has a small budget and wants flexibility without committing long term. Which Bedrock pricing option satisfies these constraints?

On-Demand pricing is correct because it offers pay-as-you-go flexibility without upfront commitments, aligning perfectly with a small budget and the need for non-committal usage. You only pay for the inferences you make. Model customization is incorrect as it's a feature for fine-tuning models, not a pricing model for general usage, and typically involves additional costs. Provisioned Throughput is incorrect because it involves reserving a specific throughput level for a committed duration, which goes against the "small budget" and "flexibility without committing long term" requirements. Spot Instance is incorrect because it's an EC2 pricing model, not a Bedrock pricing option.