Gemini 4 Hydrogen now available on AI Gateway

Vercel made Google's Gemini 4 Hydrogen available on AI Gateway. Call it with the model name google/gemini-4-hydrogen, for example in the AI SDK's streamText.

Google positions Hydrogen as the successor to Gemini 3.8 Flash, in the same latency class. Vercel's summary says it improves agentic coding, knowledge work, and tool use. It also says the model handles longer engineering tasks, follows system instructions and formatting requirements more closely, and orchestrates tools more reliably across long conversations. Those are the publisher's claims, not independent tests.

To use it in a coding agent such as Claude Code, Codex, or Cursor, install the latest Vercel CLI and run npx vercel ai-gateway setup. Then pick google/gemini-4-hydrogen in the agent. The coding agents guide says the command detects the agents you have installed and shows a diff of every planned change before it writes anything. You can also try the model in the playground on Vercel.

Vercel says AI Gateway reflects provider pricing with no markup and charges no platform fee on inference, including on bring-your-own-key requests.