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Google rolls out Gemini 4 Hydrogen, finally replacing 3.8 Flash
Google says the model is 2.5 times faster than Gemini 3.8 Flash and cuts fabricated claims by more than five times.
Google unveiled Gemini 4 Hydrogen, a new model designed for everyday agentic workflows that replaces the previous Flash branding following Carbon's release this week.
Hydrogen addresses the need for faster, cheaper, and reasonably smart models; Google bills it as a "major standalone upgrade" offering an alternative to resource-intensive frontier models like Carbon and Argon.
Hydrogen completes "tasks 2.5 times faster at its high default setting" than 3.8 Flash and achieves a 96.7% honesty rate; developers pay $1.50 per million input tokens and $7.50 per million output tokens.
Google Search users now receive improved intent understanding for complex queries and typos, with AI Mode responses featuring visual content, comparison tables, and relevant links for immediate use.
Orchestrator, a new feature in Google Antigravity, allows Carbon to offload routine steps to Hydrogen for parallel agent workflows, helping teams ship complex projects faster without increasing token costs.
Google introduced Gemini 4 Hydrogen to work with documents, complex search queries and interactive projects. The model is available in Gemini and Google Search.