Aug 20, 2024 · GPT-4o fine-tuning is available today to all developers on all paid usage tiers (opens in a new window).. To get started, visit the fine-tuning dashboard (opens in a new window), click create, and select gpt-4o-2024-08-06 from the base model drop-down. GPT-4o fine-tuning training costs $25 per million tokens, and inference is $3.75 per million input tokens and $15 per million output ...