Vercel adds Google's Gemini 4 Hydrogen to AI Gateway

Vercel's changelog says Google's Gemini 4 Hydrogen is now served through AI Gateway under the model name google/gemini-4-hydrogen. The model replaces Gemini 3.8 Flash and stays in the same latency class while improving agentic coding, knowledge work and tool use, according to the post. Vercel says it handles longer engineering tasks, finishes documents, spreadsheets and presentations in fewer agent steps, follows instructions and task boundaries more closely, and orchestrates tools more reliably over long conversations. Stronger grounding is said to cut unsupported claims in search-backed answers and fabricated tool or test results in coding reports. Developers can call it through the AI SDK, Chat Completions or the model playground, and select it in Claude Code, Codex and Cursor after installing the latest Vercel CLI.