A recent study by researchers at Stanford and MIT Sloan suggests that the democratization of financial advice via AI is largely an illusion. Although professional-grade advice now costs only an LLM subscription, users who can ask better financial questions achieve materially better outcomes, widening the gap between the financially literate and everyone else.
AI financial advice has already gone mainstream
Roughly half of adults in the UK and the US have used AI for financial advice, surpassing the number who seek out human experts. The study, with the academic title "AI Financial Advice: Supply, Demand, and Life Cycle Implications," highlights that unlike robo-advisors, LLMs are not fine-tuned to provide financial advice. Given how many people now ask AI what they should do with their money, this presents a problem.
Industry players like Robinhood (with Cortex) and eToro (with Tori) have already launched AI-assisted advice tools aimed at giving users research capabilities. Another issue: for LLMs, risky assets such as crypto fall far down the investment pecking order.
The Prompt Engineering divide
The study, which sampled 1,000 US adults, found that the quality of AI-assisted financial outcomes depends heavily on a user's existing skills. Novices do not benefit the most. Those with prompt engineering experience - the ability to ask machines questions that yield useful answers - are the ones pulling ahead.
Researchers used a quantitative model to simulate a lifetime of earnings and investment based on LLM advice. Users who had previously used AI for financial guidance received recommendations leading to an average wealth of $100,000 more by age 60 than those who had never used such tools. The difference was due to better saving behavior, not market luck.
Financial literacy also played a defining role. Those who struggled with basic financial concepts received advice that resulted in 4.1 % lower wealth outcomes. Rather than acting as a great equalizer, the AI appeared to mirror the user's own limitations. Novices who asked "thin" or poorly phrased questions received generic, overly cautious answers and lower equity allocations - missing the growth needed to build a substantial retirement fund.
Viktor Prokopenya, founder of Capital.com, commented in a LinkedIn post: "We removed the price. The question is now the gate, and a question is made of words a person either has or does not have."
AI without literacy widens the gap
The results were replicated across models including ChatGPT-5.2, Gemini 3 Flash, and GPT-5.6 Terra, though they were based on modeling rather than real-user outcomes. Prokopenya suggests the true work is not in shipping the tool itself, but in ensuring it can identify weak questions and interrogate the user to find a better answer.
If the industry fails to bridge this gap, a new economy may emerge: selling prompts for financial advice. Marketplaces like PromptBase already sell access to AI prompts for niche use cases. Rather than paying for advice directly, the uninitiated could find themselves paying for the right words to unlock advice that was promised to be free.
Why this matters for finance professionals
Finance professionals should treat AI-assisted advice as a skill, not a shortcut. The same tools that give clients better savings recommendations can reinforce poor decisions when users lack financial literacy and Prompt Engineering skills. For firms deploying LLMs in customer-facing tools, the responsibility is not merely delivering the model - it is ensuring the tool can detect when a user needs coaching and redirect the conversation, or risk selling a service that worsens the gap it claims to close.
For professionals themselves, understanding how to ask structured questions and structure AI interactions is quickly becoming a required job skill. Programs like AI for Finance Managers offer practical training on financial AI that directly addresses the digital literacy gap, and research from Stanford and MIT Sloan shows that experience with AI tools can translate to the difference between giving a client average advice and advice worth $100,000 more in retirement.
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