OpenAI has released a significant update, and I was eager to explore its potential.
GPT-4o fine-tuning is now available for all paid users, and I’ve already been tinkering.
For those who might not know, fine-tuning lets you train GPT-4o on your own data. You can improve the model’s performance for specific tasks. Like adjust its response style, or train it to understand complex concepts related to your field.
I Just Tried GPT-4o Fine-Tuning: Here’s the Scoop!
My First Impressions

The process was surprisingly straightforward. Simply go to the fine-tuning dashboard. Then choose your base model (I selected the full GPT-4o-2024-08-06 for maximum capability), and upload your training data.
Of course, there are costs involved. Training will cost $25 per million tokens, and using your fine-tuned model will cost a bit more, too.
If you’d like to try out with the smaller GPT-4o-mini-2024-07-18 model, you can get 2 million free training tokens daily until September 23rd!
What is Fine-Tuning, and Why Does it Matter?
Consider fine-tuning as a way to provide large language models like GPT-4o with specialized training.
Instead of relying on its general knowledge, developers can now feed it datasets related to their specific needs. This leads GPT-4o to:
- Improved performance: Early users report remarkable results, such as Cosine’s Genie achieving top-level performance in software engineering.
- Customized outputs: You can tailor responses to specific styles, tones, or even complex instructions.
- Reduced costs: Fine-tuned models can be more efficient, potentially saving on computing resources.
Who’s Already Seeing Success?
- Thanks to GPT-4o fine-tuning, Cosine’s AI assistant, Genie, is now amazing at fixing bugs, building features, and refactoring code.
- Distyl, a company offering AI solutions, recently achieved the top position in a major text-to-SQL benchmark. It demonstrates GPT-4o’s strength in data analysis.
What This Means for You
Whether you’re a developer, business owner, or simply interested in AI, this news is significant:
- Developers: You now have the tools to create highly specialized AI solutions tailored to your needs.
- Businesses: Expect to see even more powerful and customized AI applications hit the market, potentially transforming your operations.
- AI enthusiasts: This advancement brings us closer to a future where highly capable and adaptable AI remarkably enhances human potential.
Key Takeaways
- GPT-4o fine-tuning is now available to all developers on paid tiers.
- Early results are impressive, with some achieving state-of-the-art performance.
- Data privacy and safety remain top priorities.
- This is a major milestone in AI development with wide-ranging potential.
Community Insights and Resources
AI engineers are widely discussing GPT-4o fine-tuning, sharing their challenges, successes, and best practices on platforms like Reddit, GitHub, and webinars.
Engaging with these communities can provide valuable insights and help you navigate the complexities of fine-tuning.

A major Reddit discussion focused on a common question: when should you fine-tune a model comparing to rely on prompt engineering?
Reddit user hyperschlauer shared their experience building a corporate writing assistant using a Retrieval-Augmented Generation (RAG) system with GPT-4o mini.
They questioned the need for GPT-4o fine-tuning, given their success with base prompts.
In response, user rickyhatespeas explained:
“You would fine-tune if you want to influence the results with a lot of data and be consistent… Fine-tuning adjusts the weights and bias, unlike prompt engineering, which relies heavily on pre-existing instructions and can struggle with complex or repetitive needs.”
They compared fine-tuning to training an athlete for a specific task rather than providing general advice. They emphasized the long-term benefits of targeted model training.

Another common question among AI engineers is whether it’s feasible to fine-tune GPT-4o with their existing codebases. Hot-Entry-007 raised this point:
“My main question: Can I fine-tune it with my codebase?”
In reply, bobartig suggested a practical method. He suggested that you can fine-tune GPT-4o using your codebase by formatting your data into 100-1000 input/output examples.
Here’s an example of how to structure your data for fine-tuning:
{
"messages": [
{
"role": "system",
"content": "Refactor the given code snippet to be more concise or efficient while maintaining the same functionality."
},
{
"role": "user",
"content": "# Original function\ndef add_numbers(a, b):\n result = a + b\n return result\n\n# Refactor the function to be a one-liner"
},
{
"role": "assistant",
"content": "def add_numbers(a, b): return a + b"
}
]
}This approach give the model to learn specific tasks from your codebase, making it more skilled at addressing specialized programming tasks.
Real-World Applications of GPT-4o Fine-Tuning
A fascinating aspect of fine-tuning GPT-4o is its versatility across industries.
Healthcare, finance, education, and marketing professionals equally leverage fine-tuned models.
Beyond software development and data analysis, these industries use fine-tuning to solve domain-specific challenges.
For example, fine-tuned models could assist with medical record summarization or personalized patient advice in healthcare.
They could provide tailored tutoring experiences based on individual learning styles in education.
As more industries use this technology, it’s becoming clear that fine-tuning can transform workflows and boost productivity.
Why I’m Excited?

AI’s possibilities have always fascinated me, and this update feels like a big step forward. Imagine creating a GPT-4o version that excels in your field or fully grasps your brand’s unique voice.
The potential applications are endless.
I’m in the early stages of experimentation but will continue to share my experiences and findings.
If you’re a developer or AI enthusiast, I encourage you to explore gpt-4o fine-tuning for yourself. It’s an exciting time to be discovering AI’s potential!
Let me know if you have any questions or want to share your experiences with GPT-4o fine-tuning. I’m eager to hear what you all create!
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