AI Fine-Tuning Cost Estimator — OpenAI Training Calculator

Estimate the cost of fine-tuning an OpenAI model on your dataset. Calculate training costs and see how many requests it takes to break even.

Practical example: 1K examples, 3 epochs. For a small dataset scenario, enter the values that match your situation to get an instant cost estimate.

Is fine-tuning worth the cost? Fine-tuning is worth it when you need consistent output format, domain-specific knowledge, or want to reduce prompt length (saving inference costs). It's usually not worth it just for better general performance — prompting is cheaper to iterate.