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

> Source: https://sukruyusufkaya.com/en/learn/fine-tuning-cookbook/ftc-google-gemini-vertex-ai-tuning
> Updated: 2026-05-14T14:43:00.344Z
> Category: Fine-Tuning Cookbook (Model-by-Model)
> Module: Part XIV — Closed-Source API Fine-Tuning
**TLDR:** Google Gemini 1.5/2.0/2.5 — FT via Vertex AI. TR data upload (GCS), JSONL format (similar to OpenAI), training job submission, native evaluation pipeline. Gemini Flash 1.5/2.0 cost-effective TR FT alternative.