The smartest ChatGPT users are putting local AI in front of it — here's why

ChatGPT logo on iPhone in person's hand
(Image credit: Getty Images)

I've started noticing a growing trend among AI users. Instead of using local AI to replace ChatGPT, they are using it before ChatGPT. A quick browse through Reddit communities like r/LocalLLaMA and r/WritingWithAI shows power users actively programming tools like LM Studio to act as 'prompt-engineering assistants'—forcing the AI to ask them 5 questions about their goals before generating the final prompt.

At first, that sounded backwards. Why would anyone run a prompt through a smaller AI model before sending it to one of the most powerful AI systems available? The process of prompting the AI to ask questions works, but why would you start with local AI?

After testing the workflow myself, I realized using this technique is one of the best ways to avoid over usage limits while ensuring the cloud AI delivers the best answer possible.

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Don't let local AI scare you off

Local AI screenshot

(Image credit: LM Studio screenshot)

Before we go any further, don't let the phrase "local AI" send you running for the hills. A few years ago, running AI models on your own device often required deep technical know-how and expensive hardware. Today, that is no longer the case.

Free tools like Ollama, and GPT4All make it surprisingly easy to run small AI models directly on a standard laptop. Some browsers, like Brave, even let you plug local models right into their built-in sidebars.

To be clear, you're not replacing ChatGPT completely in this experiment. Instead, the goal is to use a smaller AI as an editor before ChatGPT ever sees your prompt. One tool helps shape the assignment for free; the other completes it.

The problem with most ChatGPT prompts

One of the biggest weaknesses of any large language model is that it assumes it understands what you mean. Although ChatGPT-5.5 has gotten a lot better at not assuming and Claude Opus 4.8 promises to deliver more accurate responses, these models will push back.

Even still, if you ask a generic or broad question, you're going to get a mediocre answer in response. That's because LLMs are designed to generate useful responses based on the information they receive. The real problem is that users are notoriously bad at providing complete context.

The local AI prompt I used

To test this multi-model workflow, I loaded a local model and gave it one job: improve my prompt before ChatGPT ever saw it.

Here is the exact prompt I used: Act as a prompt engineer. I am going to give you a task for ChatGPT. Before answering, analyze it, tell me what context or information is missing, identify any assumptions I'm making, and ask me 5–6 clarifying questions that would significantly improve the final result. Do not attempt to complete the task yet. Focus only on gathering the information needed to create the best possible prompt.

Instead of immediately generating answers, the local model became an interviewer. And that is where things got interesting.

When I asked for help planning a vacation, the local model didn't suggest destinations. Instead, it asked: What is your budget? How many people are traveling? Are you driving or flying? What are the ages of the children? Do you prefer relaxation or activities? How many days will you be away?

Only after answering those questions did I send the complete, updated context to ChatGPT. The final response felt dramatically more tailored. And while I realize this is a simple example, the point is, by having the local AI ask you questions, you won't waste your time or tokens with a bigger model doing the same thing. By having a local model ask you the right questions, you are curating a better and final prompt for ChatGPT.

Which local AI models can do this?

vibe coding

(Image credit: Pixabay)

The good news is that you don't need a massive, GPU-melting frontier model for this workflow. Smaller models are perfectly capable of identifying missing context and asking useful follow-up questions.

Popular options include lightweight open models like Google's Gemma 4, Meta's Llama 4 Scout, Microsoft's Phi-4, and compact models from Mistral and Qwen.

These models are readily available as mentioned through tools like LM Studio and GPT4All, running comfortably on standard consumer hardware.

Why power users are adopting this approach

I'll be honest, local AI isn't as smart as big tech like ChatGPT and Gemini, but as an interviewer to help narrow down your ideas, it's pretty good. That's why a growing number of enthusiasts are experimenting with smaller models as AI editors that review prompts before they reach the cloud. The local model identifies missing context, hidden assumptions and unanswered questions, ensuring ChatGPT receives a much stronger brief.

It is surprisingly similar to brainstorming with a human. But this lets you do it anytime, even when a human isn't available. And, like a human, a good consultant rarely jumps straight to a solution; they ask questions first. The better the questions, the better the outcome.

The privacy scrubber effect

Better prompts aren't the only reason people are adopting this workflow. A local model can also act as a privacy filter. Before sending information to a cloud-based AI service, users can have their local AI review prompts, remove sensitive details and replace personal information with placeholders. The local model becomes both a prompt editor and a privacy scrubber.

Why not just ask ChatGPT to do this?

A man typing on an iPhone

(Image credit: Shutterstock)

You can absolutely ask ChatGPT to ask clarifying questions before answering. In fact, that is a perfectly reasonable approach and one I do frequently. But the appeal of a separate local model is that it creates a dedicated, distraction-free layer in the workflow. You could even have it ask the questions while you're offline and then take the final prompt to ChatGPT once you're back on WiFi.

Instead of immediately jumping to a solution, the process forces you to slow down, add context and improve the request before it reaches the AI doing the heavy lifting.

Bottom line

As a power user, I'm always trying to find ways to maximize my token usage. And, after testing this workflow for every day projects like coding, I can honestly say the best results came from combining both tools.

Instead of the traditional workflow, I've adopted local AI for clarification and then ChatGPT, Claude or Gemini for reasoning and coding. It's a small change but it's proven to me that we are moving past the "one and done" chatbot. The smartest workflow seems to be utilizing local and cloud AI for the biggest impact and smartest outcome.

What do you think? Have you tried using local AI to perfect prompts for ChatGPT? Let me know in the comments.


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Amanda Caswell
AI Editor

Amanda Caswell is the AI Editor at Tom's Guide and one of today’s leading voices in AI and technology.

A celebrated contributor to various news outlets, her sharp insights and relatable storytelling have earned her a loyal readership. Amanda’s work has been recognized with prestigious honors, including outstanding contribution to media.

Known for her ability to bring clarity to even the most complex topics, Amanda seamlessly blends innovation and creativity, inspiring readers to embrace the power of AI and emerging technologies.

As a certified prompt engineer, she continues to push the boundaries of how humans and AI can work together.

Beyond her journalism career, Amanda is a long-distance runner and mom of three. She lives in New Jersey.

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