How the Economics of Inference Can Maximize AI Value

23/04/2025

As AI models evolve and adoption grows, enterprises must perform a delicate balancing act to achieve maximum value.

That's because inference - the process of running data through a model to get an output - offers a different computational challenge than training a model.

Pretraining a model - the process of ingesting data, breaking it down into tokens and finding patterns - is essentially a one-time cost. But in inference, every prompt to a model generates tokens, each of which incur a cost.

That means that as AI model performance and use increases, so do the amount of tokens generated and their associated computational costs. For companies looking to build AI capabilities, the key is generating as many tokens as possible - with maximum speed, accuracy and quality of service - without sending computational costs skyrocketing.

As such, the AI ecosystem has been working to make inference cheaper and more efficient. Inference costs have been trending down for the past year thanks to major leaps in model optimization, leading to increasingly advanced, energy-efficient accelerated computing infrastructure and full-stack solutions.

According to the Stanford University Institute for Human-Centered AI's 2025 AI Index Report, the inference cost for a system performing at the level of GPT-3.5 dropped over 280-fold between November 2022 and October 2024. At the hardware level, costs have declined by 30% annually, while energy efficiency has improved by 40% each year. Open-weight models are also closing the gap with closed models, reducing the performance difference from 8% to just 1.7% on some benchmarks in a single year. Together, these trends are rapidly lowering the barriers to advanced AI.

As models evolve and generate more demand and create more tokens, enterprises need to scale their accelerated computing resources to deliver the next generation of AI reasoning tools or risk rising costs and energy consumption.

What follows is a primer to understand the concepts of the economics of inference, enterprises can position themselves to achieve efficient, cost-effective and profitable AI solutions at scale.

Key Terminology for the Economics of AI Inference Knowing key terms of the economics of inference helps set the foundation for understanding its importance.

Tokens are the fundamental unit of data in an AI model. They're derived from data during training as text, images, audio clips and videos. Through a process called tokenization, each piece of data is broken down into smaller constituent units. During training, the model learns the relationships between tokens so it can perform inference and generate an accurate, relevant output.

Throughput refers to the amount of data - typically measured in tokens - that the model can output in a specific amount of time, which itself is a function of the infrastructure running the model. Throughput is often measured in tokens per second, with higher throughput meaning greater return on infrastructure.

Latency is a measure of the amount of time between inputting a prompt and the start of the model's response. Lower latency means faster responses. The two main ways of measuring latency are:

Time to First Token: A measurement of the initial processing time required by the model to generate its first output token after a user prompt.

Time per Output Token: The average time between consecutive tokens - or the time it takes to generate a completion token for each user querying the model at the same time. It's also known as inter-token latency or token-to-token latency.

Time to first token and time per output token are helpful benchmarks, but they're just two pieces of a larger equation. Focusing solely on them can still lead to a deterioration of performance or cost.

To account for other interdependencies, IT leaders are starting to measure goodput, which is defined as the throughput achieved by a system while maintaining target time to first token and time per output token levels. This metric allows organizations to evaluate performance in a more holistic manner, ensuring that throughput, latency and cost are aligned to support both operational efficiency and an exceptional user experience.

Energy efficiency is the measure of how effectively an AI system converts power into computational output, expressed as performance per watt. By using accelerated computing platforms, organizations can maximize tokens per watt while minimizing energy consumption.

How the Scaling Laws Apply to Inference Cost The three AI scaling laws are also core to understanding the economics of inference:

Pretraining scaling: The original scaling law that demonstrated that by increasing training dataset size, model parameter count and computational resources, models can achieve predictable improvements in intelligence and accuracy.

Post-training: A process where models are fine-tuned for accuracy and specificity so they can be applied to application development. Techniques like retrieval-augmented generation can be used to return more relevant answers from an enterprise database.

Test-time scaling (aka long thinking or reasoning ): A technique by which models allocate additional computational resources during inference to evaluate multiple possible outcomes before arriving at the best answer.

While AI is evolving and post-training and test-time scaling techniques become more sophisticated, pretraining isn't disappearing and remains an important way to scale models. Pretraining will still be needed to support post-training and test-time scaling.

Profitable AI Takes a Full-Stack Approach In comparison to inference from a model that's only gone through pretraining and post-training, models that harness test-time scaling generate multiple tokens to solve a complex problem. This results in more accurate and relevant model outputs - but

LINK:	https://blogs.nvidia.com/blog/ai-inference-economics/...
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