Announcing extended support for Fine Tuning gpt-4o and gpt-4o-mini

At Build 2025, we announced post-retirement, extended deployment and inference support for fine tuned models.

Today, we’re excited to announce we’re extending fine-tuning training for current customers of our most popular Azure OpenAI models: gpt-4o (2024-08-06) and gpt-4o-mini (2024-07-18). Hundreds of customers have pushed trillions of tokens through fine-tuned versions of these models and we’re happy to provide even more runway for your AI agents and applications.

Already using these models in Foundry? We have you covered as the only provider of fine tuning gpt-4o and gpt-4o-mini come April. Keep fine tuning!

Not yet using Microsoft Foundry? Get started today by migrating your training data to Microsoft Foundry and fine tune using Global or Standard Training for gpt-4o and gpt-4o-mini using your existing OpenAI code. You’ll have the runway to continuously fine tune or update your models. You have until March 31^st, 2026, to become a fine-tuning customer of these models.

¹For existing customers only. Otherwise, training retirement occurs at base model retirement