Gemma 4 is an open-weight language model developed by Google DeepMind, based on the Gemini technology stack. It is available in two dense models: 26B and 31B. Notably, it exhibits excellent stability in generating structured JSON output, making it an outstanding performer as an intermediate engine in automated pipelines. In terms of performance level, it falls between Claude 3 Haiku and Sonnet, or even surpasses GPT-4o-mini, demonstrating remarkable quality for its size. In biotechnology research, Gemma 4's strengths are evident in review and classification tasks. Like a meticulous research assistant, it consistently performs tasks such as reading paper abstracts and categorizing them, or detecting outliers in experimental results, all in JSON format. The 31B dense model can be run with 19GB of VRAM, allowing it to be executed even on a single consumer GPU, and its official support in Ollama makes installation easy. When used as a generation backend for a RAG engine, it exhibits a low hallucination rate, allowing for reliable responses. Thanks to Google's vast multilingual training data, its Korean language processing capabilities are also commendable. It generates natural results in tasks such as summarizing Korean biotechnology literature, performing Korean-English parallel analysis, and translating experimental protocols. Furthermore, since it uses the same tokenizer as the Gemini API, transitioning workflows prototyped with cloud Gemini to local Gemma 4 is seamless. It is particularly suitable for constantly running agents such as update checkers and document reviewers.

Google's lightweight, high-performance, open-weight language model based on Gemini technology.

Case 1: Automated paper classification system — 1,000 PubMed abstracts are fed to Gemma 4 31B in JSON mode. Each paper is classified into four categories: "genomics/proteomics/drug_discovery/clinical". The post-processing pipeline operates stably with a JSON parsing failure rate of less than 0.3%. (140 characters)