Fine-Tuning

What it means

Further training an already pre-trained model using additional task-specific or domain-specific data.

Code example

from openai import OpenAI
client = OpenAI()
job = client.fine_tuning.jobs.create(
  training_file="file-abc123",
  model="gpt-4o-mini",
)
print(job.id)

Why it matters

It adapts a model to specialised tasks or behaviour when prompting and retrieval are insufficient.

When to use it

• Adapting tone and style
• Teaching a niche domain
• Shortening prompts

Further reading

• OpenAI Fine-tuning Guide