Reinforcement fine-tuning is now available for o4-mini! You might remember we announced the alpha program for RFT during 12 Days of OpenAI last December . We’ve been working on it since, and verified organizations can get started with it today. This marks the first time you fine-tune on OpenAI reason…

Fine-tuning updates: Reinforcement fine-tuning now available + GPT-4.1 nano fine-tuning

Karan_Sharma June 6, 2025, 10:55pm 13

not yet, but this is something we are actively considering!

2 Likes

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