Gemini 4 Hydrogen
Gemini 4 Hydrogen is Google's fast, cost-efficient Gemini model and the successor to Gemini 3.8 Flash. Use it for everyday agentic coding and tool-heavy work. For the hardest tasks, use Gemini 4 Carbon.
Effort levels
Gemini 4 Hydrogen supports four effort levels: xhigh, high (the default), medium, and low. Keep it on high for agentic coding. Quality drops noticeably at medium and low, so use those only for simple, latency-sensitive tasks. Raise it to xhigh for hard debugging and reasoning, at the cost of more thinking tokens and slower responses.
Tools
Gemini 4 Hydrogen has access to all agent tools when used with Cursor including:
Find files by name, read directory structures, and grep for patterns.
Generate search queries and fetch results from the web.
Read file contents, including images for vision-capable models.
Suggest edits and apply them automatically.
Execute terminal commands and monitor output.
Control a browser to take screenshots, test applications, and verify visual changes. See the Browser documentation.
Generate images from text descriptions or reference images.
Ask clarifying questions while continuing to work in the background.
Retrieve rules based on type and description.
Learn more about how tools work and tool calling fundamentals.
Pricing
Gemini 4 Hydrogen is a third-party model, so it isn't part of the usage included with Cursor plans. On The X Subscription it's billed at the rates below from your prepaid credit. On legacy Cursor plans it draws from the Other Models pool. All prices are per million tokens.
| Name | ||||
|---|---|---|---|---|
| $1.5 | - | $0.075 | $7.5 |