Gemini 4 Carbon
Gemini 4 Carbon is Google's most capable Gemini model. Use it for complex software engineering, long agentic coding tasks, and document-heavy work. For faster, lower-cost everyday work, use Gemini 4 Argon.
Strengths
- Clear, plain explanations: it describes its changes and reasoning directly, without padding.
Effort levels
Gemini 4 Carbon supports three effort levels: high, medium (the default), and low. Raise it to high for the hardest tasks, or drop to low for faster responses on simpler ones.
Tools
Gemini 4 Carbon 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 Carbon 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 | ||||
|---|---|---|---|---|
| $2 | - | $0.1 | $10 |
These are Google's introductory rates, available through November 30, 2026. From December 1, 2026, Gemini 4 Carbon is billed at $4 input, $0.20 cache read, and $20 output per million tokens.