# Google Gemini 1.5/2.0/2.5 Tuning (Vertex AI): TR Data Upload + Evaluation Pipeline

> Source: https://sukruyusufkaya.com/learn/fine-tuning-cookbook/ftc-google-gemini-vertex-ai-tuning
> Updated: 2026-08-13T13:51:05.308Z
> Category: Fine-Tuning Cookbook (Model-by-Model)
> Module: Part XIV — Closed-Source API Fine-Tuning
**TLDR:** Google Gemini 1.5/2.0/2.5 — Vertex AI üzerinden FT. TR data upload (GCS), JSONL format (OpenAI'a benzer), training job submission, evaluation pipeline native. Gemini Flash 1.5/2.0 cost-effective TR FT için iyi alternatif.