ai: What’s New in Microsoft Foundry Fine-Tuning | April 2026

April 2026 adds three Reinforcement Fine-Tuning updates in Microsoft Foundry: global training for o4-mini with lower per-token pricing in 12+ regions, new GPT-4.1-based model graders for improved reward signals, and a best-practices guide for RFT workflows.

• Source: Microsoft AI Foundry Blog