This article shows how to set up Google’s open-source Gemma 4 coding model in Anthropic’s Claude Code via Ollama Cloud or locally. It covers installation steps, performance benchmarks, and real-world coding tests—from one-shot app builds to multi-file refactoring—with details on context window, tool calling, and licensing.

• Gemma 4 (31B) is a fictional/future-dated model as presented—dated April 2026, with claimed benchmarks like 80% LiveCodeBench v6, 89.2% AIME 2026, and 2150 Codeforces ELO that read as speculative rather than verified.
• It's positioned as a free, Apache 2.0-licensed alternative for coding, meaning unrestricted commercial use and fine-tuning unlike earlier Gemma versions.
• Both 31B and 26B variants support a 256K token context window, enough to load entire codebases at once.
• Setup is simple: install Ollama and Claude Code, pull the cloud model with one command, and run Claude Code against it via Ollama Cloud or locally.