Fine-tuning with the Gemini API

With the deprecation of Gemini 1.5 Flash-001 in May 2025, we no longer have a model available which supports fine-tuning in the Gemini API, but it is supported in Vertex AI.

We plan to bring fine-tuning support back in the future. We would love to hear from you on our developer forum if fine-tuning is important to your use case.